Entries |
Document | Title | Date |
20080197725 | Cooling arrangement for a variable reluctance electric machine - A variable reluctance electric machine comprising a rotor and a stator; the stator having two or more electromagnetic windings and the rotor having a plurality of salient poles, the salient poles defining axially extending cooling fluid channels; wherein the salient poles and the cooling fluid channels are circumferentially skewed along at least a part of their length whereby in use the cooling fluid channels impel cooling fluid in a substantially axial direction towards the electromagnetic windings and the stator to facilitate heat transfer and dissipation from the windings. | 08-21-2008 |
20080231126 | MOTOR COOLING ARRANGEMENT - At least one cooling duct is provided for a motor that includes a frame. The cooling duct has a wall supported by the frame that, in turn, comprises an arcuate surface portion and a non-arcuate surface portion that together define a bore. A method of increasing the transfer of heat away from a motor is also presented. | 09-25-2008 |
20080303360 | INSULATED BEARING MOTOR ASSEMBLY - A motor with improved bearing life has a shaft rotatably supported by a pair bearings. The motor further has a stator and a rotor, wherein one of the stator and the rotor is mounted to the shaft and the other of the stator and the rotor surrounds the shaft so that the stator and rotor can rotate with respect to one another. The motor has one or more features to protect at least one of the bearings from heat emitted by at least one of the stator and the rotor. | 12-11-2008 |
20080309175 | ELECTRIC MOTOR COOLING - An electric motor cooling system is provided that includes a housing and first and second cooling sources that are different from one another respectively to provide first and second cooling flows. A stator is mounted in the housing and receives the first cooling flow. A rotor is rotatable relative to the stator and receives the second cooling flow. In the examples, the housing supports a journal bearing upon which the rotor is supported, and the second cooling flows through the journal bearing. The first cooling flow is provided by a low pressure source such as ram air, and the second cooling flow is provided by high pressure source such as bleed air, for example. A circumferential gap is provided between the rotor and stator. In one example, a seal is arranged between the housing and a stator for providing a cavity in fluid communication with the journal bearing and the gap. The cooling flow from the journal bearing passes through the cavity and into the gap for cooling the rotor. In another example, the rotor includes circumferentially spaced magnets providing spaces. The spaces are arranged interiorly of an exterior surface of the rotor. A passage is in communication with the spaces and journal bearing. The second cooling flow from the journal bearing passes through the passage and into the spaces for cooling the rotor. | 12-18-2008 |
20080309176 | METHOD AND APPARATUS FOR COOLING GENERATORS - A baffle for guiding cooling fluids in a power generator cooled by a cooling fluid and having a flange, a stator, and an end stator has an inclined surface configured to direct a first portion of the cooling fluid flow towards the flange, a second portion of the cooling fluid flow towards the end stator and a third portion of the first portion towards an angled surface of the flange. | 12-18-2008 |
20090026858 | COOLING DEVICE FOR AN ELECTRICAL MACHINE, ELECTRICAL MACHINES HAVING A COOLING DEVICE SUCH AS THIS, CORE LAMINATE AND PRODUCTION METHOD FOR SUCH ELECTRICAL MACHINES - The invention relates to a cooling device for an electric machine, in particular, for an electric motor comprising a stator ( | 01-29-2009 |
20090058204 | Apparatus and Method for Cooling Rotor and Stator Motor Cores - A laminated core for a motor includes a plurality of laminations each of which are disposed in a non-spaced relation to an adjacent lamination and each of which have a disc-like configuration and wherein the plurality of laminations are each dimensioned and configured to provide for a flow of a cooling fluid traveling in a radial direction to a rotational axis of the motor. A method of cooling a motor is also presented. | 03-05-2009 |
20090184592 | ROTATING ELECTRIC MACHINE - A rotating electric machine is provided that includes a rotating portion including a rotating shaft, a housing enclosing at least a part of the rotating shaft, and a stator coil accommodated in the housing. A static coolant supply portion supplies coolant to the stator coil from the outside of the stator coil in a radial direction of the rotating shaft. A rotating coolant supply portion supplies coolant to the stator coil from the inside of the stator coil in the radial direction of the rotating shaft. A guide portion is provided in the housing and extends toward the inner surface of the stator coil in the radial direction of the rotating shaft. The guide portion has a through hole through which coolant flows. | 07-23-2009 |
20090261669 | METHOD OF MAKING AND DEVICE FOR COOLING ROTOR MOTOR CORES - A vent plate for a rotor of a motor core includes a hub, a plurality of spokes extending from the hub and a plurality of coffin portions each having a coffin bore extending therethrough and at least one of which is connected with a spoke. The coffin portions may each be radially spaced from, and circumferentially spaced about the hub and wherein each coffin portion comprises an outer radial end, and a connecting ring which extends about the periphery of the coffin portions. The connecting ring may engage each outer radial end. In another embodiment of the present invention, a method of making a rotor for an electric motor is also presented. | 10-22-2009 |
20090267428 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core. | 10-29-2009 |
20100026110 | METHOD AND DEVICE FOR COOLING AN ELECTRIC MACHINE - In a slowly-running electric machine, such as a bulb turbine generator, air circulation for cooling is supplied by externally driven fans. A cooling device is mounted on the pressure or the suction side of the fan and the rotor and the stator are mounted on the suction side of the fan. | 02-04-2010 |
20100026111 | STATOR FOR AN ELECTRICAL MACHINE WITH LIQUID COOLING - The invention relates to a stator ( | 02-04-2010 |
20100045126 | ROTOR OF ROTARY-ELECTRIC MACHINE - In a rotor of a rotary-electric machine, in order to improve a cooling performance of a rotor winding on an end portion of the rotor in an axial direction, the rotor winding being held by a retaining ring of the rotor winding formed by laminating conductors in slots of a rotor iron core extending in an axial direction and having slots formed at predetermined intervals in a peripheral direction, ventilation channels through which cooling air flows are formed in the surfaces of the conductors along a longitudinal direction. The ventilation channels have air inlet holes which guide the cooling air and exhaust holes which exhaust the cooling air, the conductors are laminated to constitute the rotor winding, and the conductors include openings of the air inlet holes in bottoms of the conductors on a side opposite to a side on which the ventilation channels are formed. | 02-25-2010 |
20100072837 | MOTOR COOLING SYSTEM - A vehicle motor system includes a motor that receives cooling fluid flow from two different cooling sources. A control, such as a valve, selectively changes the cooling flow between the two cooling sources in response to an operational state of the vehicle. | 03-25-2010 |
20100127583 | DRIVING MECHANISM - A driving apparatus includes: a rotating electrical machine; an inverter capable of supplying electric power to the rotating electrical machine; an electrical device connected to the inverter; a containing case capable of containing the rotating electrical machine, the inverter, and the electrical device; and a cooling coolant circulation circuit, distributing cooling coolant capable of cooling the inverter and the electrical device, which allows the inverter to be cooled at an upstream side relative to the electrical device in a direction in which the cooling coolant is distributed. | 05-27-2010 |
20100133932 | EXTERNAL ROTOR AND HOUSING THEREFOR - A housing for an external rotor with a side wall; an end cover directly connected to the side wall; a cavity formed between the side wall and the end cover; a plurality of openings formed in the side wall; a plurality of wind wheels; a plurality of air inlets, each of the air inlets disposed one between adjacent wind wheels; a base disposed at the center of the end cover and connected to the side wall via the wind wheels; and a center hole disposed at the center of the base, the center hole for forming connection to a drive shaft of the external rotor. An external rotor with the housing, a magnetic conductive housing; and a plurality of magnetic tiles. | 06-03-2010 |
20100156207 | System and Method for Managing Air Flow in a Motor - Certain exemplary embodiments can comprise a system for managing air flow within an induction motor, such as in the rotor assembly of the motor. The system can comprise a gap blocker to substantially impede air flow through radial apertures defined by and/or near end regions of the rotor conductor bars. | 06-24-2010 |
20100181849 | ROTOR FOR A GENERATOR - A rotor for a generator includes a cylindrical rotor body with axial winding slots which are arranged in a distributed manner over the circumference and in which are arranged conductor elements which extend in the axial direction. A cooling medium from a sub-slot which is arranged at the bottom of the winding slot is fed along the axis in periodic intervals to the conductor elements. Beneath the conductor elements provision is made for ripple springs which in each case press the conductor elements of a winding slot against a slot wedge which closes off the winding slot at the top. With such a rotor, an adequate spring force is achieved by the ripple springs being arranged at the bottom of the sub-slot and, via an axial profile which is arranged in the sub-slot, acting by their spring force upon the conductor elements which lie above them. | 07-22-2010 |
20100187922 | MOTOR AIR FLOW COOLING - In one possible embodiment, an aircraft electric motor cooling system is provided having an airflow path through a spinner which includes a first airflow path between an inner rotor and a stator, a second airflow path between an outer rotor the stator and a third airflow path along an outer surface of the outer rotor. | 07-29-2010 |
20100237723 | SYSTEM AND METHOD FOR THERMAL MANAGEMENT IN ELECTRICAL MACHINES - A cooling system for an electrical machine is provided. The cooling system includes at least one baffle enclosing multiple endwindings, wherein the at least one baffle is configured to guide a cooling fluid flow to multiple regions of interest in the machine. | 09-23-2010 |
20100289349 | MULTIPLE PASS AXIAL COOLED GENERATOR - A generator includes a housing and a stator arranged within the housing. The stator includes a first end that extends to a second end, and a plurality of axial flow passages extending between the first and second ends. The generator also includes at least one air flow re-direction member provided on at least one of the first and second ends of the stator. The at least one air flow re-direction member fluidly connects adjacent ones of the plurality of axial flow passages. The at least one air flow re-direction member guides an air flow passing though one of the plurality of axial flow passages in a first direction into an adjacent one of the plurality of axial flow passages in a second direction, the second direction being distinct from the first direction. | 11-18-2010 |
20110115315 | ROTOR FOR A MULTIPOLAR SYNCHRONOUS ELECTRIC MACHINE WITH SALIENT POLES - A rotor for a multipolar synchronous rotating machine includes a plurality of salient poles, each salient pole including a polar body and being surrounded by an induction coil including a plurality of layers of coiled wire; a plurality of spacers such that each spacer of the plurality of spacers creates a first spacing between two successive layers of coiled wire of the plurality of layers for the circulation of coolant between each layer of coiled wire of the plurality of layers, the rotor including a second spacing between the polar body and each layer of coiled wire of the plurality of layers for the circulation of the coolant between the induction coil and the polar body. | 05-19-2011 |
20110121670 | FLUID COOLED ELECTRIC MOTOR - An electric motor includes a stator fixed in a motor housing, disposed around a motor shaft rotatable relative to the motor housing and formed with a radially extending through hole that is in spatial communication with an air-flow space defined between the stator and a tube body of the motor housing. The tube body is formed with an annular fluid-flow channel for receiving cooling fluid therein. A rotor is sleeved fixedly on the motor shaft. The motor shaft co-rotates with the rotor. The rotor is formed with angularly spaced apart slots extending inwardly and radially from an outer annular surface thereof, and air holes extending from an end surface thereof in an axial direction. Each air hole in the rotor is in spatial communication with corresponding slots. When the rotor rotates, the through hole in the stator is successively in spatial communication with the slots in the rotor. | 05-26-2011 |
20110169352 | MOTOR AND VEHICLE - This disclosure discloses a motor comprising: a motor main body; and a winding switching unit configured to switch windings of the motor main body; the motor main body including: a motor housing that a first coolant channel is formed inside; and a stator having the windings and fixed to an inner surface of the motor housing, the winding switching unit including: a winding switching housing that a second coolant channel is formed inside and being disposed on an outer surface of the motor housing, and heat-generating components disposed at an outer surface of the winding switching housing and used to switch the windings. | 07-14-2011 |
20110169353 | ROTATING ELECTRIC MACHINE - A motor generator serving as a rotating electric machine includes: a rotor; a rotor shaft rotating with the rotor; and end plates and provided at opposite ends, respectively, of the rotor. The rotor shaft has oil channels and provided independently of each other and passing oil therethrough. The end plates and have oil channels and communicating with the oil channels and, respectively, and guiding oil to the rotor. The oil channels and are formed so as to avoid passing oil in a stream having vector components facing one another, as seen in the axial direction of a center axis, on the route of the channels. The oil channels and are formed so as to avoid passing oil in a stream having vector components facing one another, as seen in the axial direction of the center axis, on the route of the channels. The rotating electric machine thus allows the rotor to be cooled uniformly. | 07-14-2011 |
20110181137 | PERMANENT MAGNET TYPE ELECTRIC POWER GENERATOR - For providing a permanent magnet type generator that has a limited inside temperature rise gradient even if the capacity thereof is increased and permits to reduce the size thereof, the present invention provides a ventilation means that increases the inner gas (air or cooling wind) quantity that is caused circulated via the heat exchanger causing to flow outer air is increased more at a region facing the outer air exhaust side in the heat exchanger than at the outer air inlet side. | 07-28-2011 |
20110181138 | TOTALLY ENCLOSED MOTOR - A totally enclosed motor which includes a rotor disposed inside a housing and a heat of the rotor is transferred to the housing, a stator disposed inside the housing and a heat of the stator is transferred to the housing, and an inner fin which is disposed in the rotor and agitates air inside the housing. The totally enclosed motor is cooled by a forced convection by an outer fan disposed outside the housing, or by a natural convention in the vicinity of an outer surface of the housing, and a shape of the rotor is different between one end side and the other end side of the rotor in an extending direction of a rotary shaft of the rotor. | 07-28-2011 |
20110215661 | ROTATING ELECTRICAL MACHINE AND STATOR THEREOF - According to an embodiment, radially extending inner spacers are provided in a stator core at a distance from each other in the circumferential direction at intervals between a prescribed number of stacked magnetic steel plates, and ventilation ducts for cooling gas flow are formed in the radial direction. The perimeter of each ventilation duct is defined by the inner spacers and a magnetic steel plate separated by the inner spacers. The cooling gas, which flows in the rotation direction, is split laterally to both sides of a rotor coil and directed toward the outer circumference. Portions of the shoulder parts of a wedge are cut off such that the width of the shoulder parts of the wedge at positions corresponding to the ventilation ducts matches the slot width. | 09-08-2011 |
20110221288 | SYSTEM AND METHOD FOR COOLING IN ELECTRIC MACHINES - A segmented cooling system for an electric machine is provided. The segmented cooling system includes multiple cooling subsystems coupled to respective multiple stator segments in the electric machine, wherein the multiple cooling subsystems directs fluid flow towards one or more regions of interest within the respective multiple stator segments. | 09-15-2011 |
20110254392 | ALTERNATOR WITH DUAL AXIAL AIR FLOW - A vehicle alternator comprises a rotor and a stator positioned within a housing. The housing includes a front face, a rear face, and a outer wall extending between the front face and the rear face. The front face includes a plurality of air inlet holes, and the rear face including a plurality of air outlet holes. The outer wall is void of air holes that extend through the outer wall. The rotor is positioned within the housing and configured to rotate about an axis. The stator is positioned within the housing between the rotor and the outer wall of the housing. The stator includes a core with an outer surface, a front end and a rear end. A plurality of substantially axial air passages are positioned between the outer wall of the housing and the outer surface of the stator core. | 10-20-2011 |
20110266896 | ROTATING ELECTRIC MACHINE - A rotating electric machine is provided and includes a rotor rotating around an axis and a stator concentrically surrounding the rotor. The stator is made up of a plurality of packages of laminations and includes a plurality of axial slots distributed along the inner circumference of the stator for receiving a stator winding. Cooling elements are provided within the stator to remove heat from the stator by a flow of cooling air flowing through said stator. The cooling efficiency and stator design are improved by providing radial and axial channels for the cooling air at the slots by combining packages of laminations with different shapes of the slot cut-outs. | 11-03-2011 |
20110273039 | Electric Machine Cooling System and Method - Embodiments of the invention provide an electric machine module including a module housing, which can at least partially define a machine cavity. In some embodiments, an electric machine can include a stator assembly and a rotor assembly and can be positioned in the machine cavity. In some embodiments, the module housing can include a coolant transport network, which can include at least one passage in fluid communication with at least one first annulus and at least one second annulus. In some embodiments, the first annulus can be substantially axially adjacent to an axial end of the stator assembly and the second annulus can be substantially axially adjacent to an axial end of the rotor assembly. In some embodiments, the annuli can include a plurality of annulus apertures. | 11-10-2011 |
20110273040 | Electric Machine Cooling System and Method - Some embodiments of the invention provide an electric machine including a rotor assembly. In some embodiments, the rotor assembly can include a plurality of rotor laminations including at least one first aperture positioned through a portion of the rotor laminations. In some embodiments, the first apertures can form at least one magnet channel when the rotor assembly is substantially assembled. At least one permanent magnet can be positioned in each of the magnet channels. In some embodiments, at least one second aperture can be positioned through a portion of some of the laminations, along a Q-axis, and adjacent to the at magnet channel. Also, the second apertures can be configured and arranged to form at least one first coolant channel when the rotor assembly is substantially assembled. | 11-10-2011 |
20110278969 | ELECTRICAL MACHINE WITH MULTIPLE COOLING FLOWS AND COOLING METHOD - An electrical machine with a stator has a winding support, which has at least one radial cooling slot, and a rotor, which likewise has at least one radial cooling slot. The winding support of the stator has on its outer shell a number of axially running cooling ribs, along which an axially running first cooling flow can be directed. Furthermore, the rotor has axially running first cooling ducts, which open out into its at least one radial cooling slot, so that a second cooling flow can be directed in the axial direction along the axial cooling ribs of the stator through the axial first cooling ducts of the rotor, the at least one radial cooling slot of the rotor, the air gap between the rotor and the stator and the at least one radial cooling slot. In this way, the stator can be cooled by two different cooling flows. | 11-17-2011 |
20110304229 | STATOR ELEMENT - A stator element having a yoke is provided. The stator has several laminated metal plates and a number of tooth radially protruding from one side of the yoke. The stator also has a cooling unit providing a path for the flow of a cooling medium along the yoke. The yoke is at least partially provided with a plated metal layer in the region contacted by the cooling unit. | 12-15-2011 |
20110316368 | Electrical Machine - An electrical machine is provided, comprising a stator ( | 12-29-2011 |
20120013207 | STATOR SLEEVE FOR AN ELECTRIC MACHINE AND METHOD OF ESTABLISHING A COOLANT CAVITY ABOUT A STATOR FOR AN ELECTRIC MACHINE - An electric machine including a housing, and a stator mounted within the housing. The stator includes an outer perimetric surface and an inner perimetric surface. A rotor is mounted, at least in part, within the inner perimetric surface of the stator. The rotor is rotatable relative to the stator. A stator sleeve extends about the stator. The stator sleeve includes a first sleeve portion and a second sleeve portion. The first sleeve portion includes a first diametric edge that extends to a second diametric edge, and the second sleeve portion includes a first diametric edge section that extends to a second diametric edge section. The stator sleeve is configured and disposed to establish a coolant cavity about the outer perimetric surface of the stator. | 01-19-2012 |
20120019084 | COOLING SYSTEM OF ELECTRIC ROTATING MACHINE FOR VEHICLES - A cooling system of a AC generator for vehicles has a stator with a stator winding, a rotor that is arranged in an inner circumferential side of the stator, a rectifier that converts an alternating current voltage generated in the stator winding into direct current, and a rear cover that covers the rectifier. The rear cover has an intake duct connecting portion that projects outside and an air intake duct is attached to a tip portion of the intake duct connecting portion. A dividing wall that divides an internal space of the rear cover into a plurality of spaces along a direction extending from the rectifier backwardly relative to the direction of rotation is disposed in the intake duct connecting portion. | 01-26-2012 |
20120025640 | MOTOR - A motor including a housing, a stator assembly, a rotor assembly, a controller, and a top end cover. The housing includes a cavity. The stator assembly includes a stator core and a stator winding and is housed in the cavity. The top end cover is disposed on the top of the housing. The rotor assembly includes a permanent magnet, a revolving shaft, and a rotor support. A bearing support extends inward from the center of a top end face of the top end cover, with a bearing chamber respectively provided on both ends thereof. The revolving shaft is disposed into and supports the bearing. A connection kit extends from the edge of the rotor support and outside the bearing support. The permanent magnet is disposed on the connection kit. The motor is characterized by simple and compact structure, lower cost, easy thermal dissipation, smaller axial dimension, and convenient assembly. | 02-02-2012 |
20120025641 | METHOD AND DEVICE FOR COOLING AN ELECTRIC MACHINE - In a slowly-running electric machine, such as a bulb turbine generator, air circulation for cooling is supplied by externally driven fans. A cooling device is mounted on the pressure or the suction side of the fan and the rotor and the stator are mounted on the suction side of the fan. | 02-02-2012 |
20120032539 | Permanent Magnet Rotating Machine - A permanent magnet rotating machine has a stator, in which armature windings are formed in a plurality of slots formed in a stator iron core, and also has a rotor, in which two magnet insertion slots are formed for each pole in a rotor iron core in a V shape when viewed from the outer circumference of the rotor and one permanent magnet is embedded in each magnet insertion slot with polarity alternating for each pole; a wall at one end of the magnet insertion slot on the external diameter side of the rotor is formed with three arcs having different curvatures, one of the three arcs being parallel to the outer circumference of the rotor, and a wall at the other end of the magnet insertion slot on the internal diameter side of the rotor is formed in an arc shape. | 02-09-2012 |
20120062057 | TRACTION MOTOR - According to one embodiment, a traction motor includes a stator core, a rotor core, a first bearing, a second bearing, a rotor shaft, a first ventilation passage made at an outer circumference portion of the stator core, a first fan, and a second ventilation passage to introduce external air. And, in the motor, a first minute gap is provided between an end portion of a first fan main plate and an inner circumference portion of the first bracket, cooling wind is discharged to the motor outside via the second ventilation passage, an outer circumference portion of the first fan, a ventilation portion in the first bracket and the first ventilation passage, and the second ventilation passage is made so that the cooling wind entered from the first air intake port flows around the rotor shaft portion between the first ventilation fan and the first bearing. | 03-15-2012 |
20120074800 | Stator and Method of Assembly - The present application provides a stator. The stator may include a number of poles and a stator tip and cooling assembly. The stator tip and cooling assembly may include a number of stator tips with a number of cooling tubes adjacent thereto such that the stator tips align with the poles and the cooling tubes cool the poles. | 03-29-2012 |
20120074801 | Magnetic Rotor Having Inset Bridges To Promote Cooling - A rotor arrangement with decreased fluid flow impedance and improved rotary motor cooling is mountable on a shaft for rotation relative to the stator of a rotary motor arrangement The rotor arrangement has a plurality of laminations joined together to form a multilayer laminated rotor with a plurality of magnet receptacles. Each of the laminations has a solid central section surrounding an opening within which the shaft is receivable, spokes extending substantially radially outwardly from said solid central section, ribs interposed between adjacent spokes, and bridges interconnecting the spokes and ribs. At least some of the bridges are inset from an outer diameter of the lamination toward the solid central section to decrease fluid flow impedance and improve rotary motor cooling. | 03-29-2012 |
20120080966 | HEAT-DISSIPATION STRUCTURE FOR MOTOR - A heat-dissipation structure for a motor including a motor shell, a control box, and a coupling shell. One end of the coupling shell is connected to the bottom of the motor shell and the other end thereof is connected to the top of the control box and a plurality of air vents are arranged on a side wall of the coupling shell. The introduction of the coupling shell enlarges the inner space of the control box and achieves rapid heat dissipation and a better heat dissipation effect. The heat-dissipation structure features rapid heat dissipation, excellent heat dissipation effect, a simple structure, an attractive shape, and great universality. | 04-05-2012 |
20120098362 | DYNAMOELECTRIC MACHINE COIL SPACERBLOCK HAVING FLOW DEFLECTING CHANNEL IN COIL FACING SURFACE THEREOF - A dynamoelectric machine includes a rotor having a plurality of adjacent coils; and a spaceblock disposed between adjacent coils so as to define at least a first cavity adjacent the spaceblock and between mutually adjacent coils, the spaceblock including a channel disposed in a coil facing surface of the spaceblock for intercepting and redirecting a circulating coolant flow to the first cavity. | 04-26-2012 |
20120112573 | ELECTRIC MACHINE SYSTEM INCLUDING AN ALTERNATING CURRENT (AC) ELECTRIC MACHINE HAVING AN EXPANDABLE COOLANT MANIFOLD - An electric machine system including an alternating current (AC) electric machine. The AC electric machine includes a machine housing having a machine portion and a switch portion. A stator is fixedly mounted in the machine portion of the machine housing, and a rotor rotatably mounted relative to the stator. A switch assembly is arranged within the switch portion of the machine housing and electrically connected to the stator. The switch assembly includes a switch module having a switch member. The switch module is configured and disposed to be detachably mounted in the switch portion of the machine housing. A cooling system that includes an expandable coolant manifold is arranged in the switch portion of the machine housing. The expandable coolant manifold is fluidly connected to the switch module. | 05-10-2012 |
20120112574 | Rotor Lamination Cooling System and Method - Some embodiments of the invention provide an electric machine module including a rotor assembly. The rotor assembly can include a rotor hub, a first set of rotor laminations which can include a portion having a first inner radius, and a second set of rotor laminations which can include a portion having a second inner radius larger than the first inner radius. At least one circumferential flow channel defined by the first set of rotor laminations, the second set of rotor laminations, and the rotor hub can at least partially circumscribe the rotor hub. | 05-10-2012 |
20120126643 | APPARATUSES USEFUL FOR COOLING WINDINGS OF ROTOR ASSEMBLIES - Braces that can be placed in the gap between adjacent rotor field windings to help secure the rotor field windings in place during operation and that help cool those windings. Rotor assemblies with cooling ducts, such as rotor body cooling ducts and pole body cooling ducts, that help cool rotor field windings. | 05-24-2012 |
20120153749 | ELECTRIC MOTOR AND ELECTRIC VEHICLE HAVING THE SAME - A motor for an electric vehicle includes a frame, a stator disposed in the frame, a rotor disposed to be rotatable with respect to the stator; and an engaging portion that restricts the stator from moving with respect to the frame in a circumferential direction, the engaging portion including at least one rib protruding from one of the surfaces of the frame and the stator, and at least one rib accommodation portion formed at other of the surfaces of the frame and the stator, wherein the at least one rib and the at least one accommodation portion are engaged to allow heat to be transferred therebetween. Under this configuration, a cooling performance may be improved and durability may be enhanced. | 06-21-2012 |
20120169159 | APPARATUS FOR VENTILATING STATOR CORE - An apparatus for venting a stator core having a plurality of slots through which stator windings extend is provided. The apparatus includes a first ventilation layer for positioning at an end of the stator core. The first ventilation layer includes an inner set of circumferentially spaced slots that correspond to the plurality of slots and through which the stator windings extend, and an outer set of slots radially distanced from the inner set of slots. A second ventilation layer for positioning between the first ventilation layer and a stator core flange of the stator core is also provided. The second ventilation layer includes a set of ventilation slots providing a flow path between the stator windings to the outer set of slots. | 07-05-2012 |
20120169160 | Motor Casing and A Motor Utilizing the Same - The invention discloses a motor casing including a frame assembly and a motor base. The frame assembly includes a frame having an inner face defining an air channel, and a plurality of connection members disposed in the air channel. Each connection member has first and second ends. The first ends of the connection members are coupled to the inner face of the frame. The motor base includes a supporting member and a covering member. The supporting member has an inner surface defining a through-hole, and an outer surface coupled with the second ends of the connection members. An opening portion and a coupling portion are formed at two sides of the through-hole. The covering member is coupled to the opening portion of the supporting member and has first and second surfaces. The first surface faces the through-hole of the supporting member. The covering member includes at least one vent. | 07-05-2012 |
20120169161 | DISK MOTOR USING A PERMANENT MAGNET AND BYPASSING THE MAGNETIC FORCE OF THE MAGNET - The present invention relates to a disk-type motor using a permanent magnet, wherein the permanent magnet is arranged on a disk-type rotor ( | 07-05-2012 |
20120194014 | SYSTEM AND METHOD FOR INCREASING AIRFLOW IN ELECTRIC MACHINES - An air-cooled electric machine, such as an alternating current motor, having a housing containing a rotating shaft and a housing airflow cooling path has cooling vents on the housing periphery. An external cooling system having a duct enclosure is coupled to the housing exterior, and defines a duct airflow cooling path that is in communication with the housing airflow cooling vent and housing airflow cooling path. A duct fan within the duct enclosure external the housing is coupled to and driven by the shaft. The duct fan circulates air at above ambient pressure into the housing airflow cooling path. | 08-02-2012 |
20120194015 | COOLING ARRANGEMENT FOR A MAGNETIC GEARBOX - This invention relates to a magnetic gearbox, comprising: an inner rotor having a first plurality of magnetic flux sources; an outer rotor having a second plurality of magnetic flux sources; and, a modulator having a plurality of pole pieces positioned between the first and second magnetic flux sources and separated from each by an air gap, wherein upon relative rotation of the inner rotor, outer rotor and modulator the first and second magnetic flux sources and pole pieces are arranged to provide a modulated magnetic field in the air gap adjacent each rotor; wherein either or both of the modulator and inner rotor include at least one nozzle for directing fluid radially across the respective air gap so as to impinge on the adjacent rotor or modulator. | 08-02-2012 |
20120212086 | ELECTRIC MOTOR - In one embodiment, an electric motor. A first bracket is fixed to the first side of a stator core in an axial direction, and is fixed to first bearing housing. A second bracket is fixed to the second side of the stator core, and is fixed to second bearing housing. The rotor includes a shaft rotatably supported by bearings, and an attached rotor core. Rotor core faces the inside of the stator core. A fan is attached to the shaft between the rotor core and the first housing. A flue formed between the first housing and the first bracket is configured to draw air from a port to a part of the first bracket. A rotation detection circuit includes a detected part fixed to the fan, and is within the flue. A sensor operable to detect the part is set in the flue, counter to the detected part. | 08-23-2012 |
20120228969 | STATOR ARRANGEMENT - A Stator arrangement for an electric machine includes a stator having a stator yoke with a plurality of stator slots. Each stator slot accommodates at least two adjacently disposed sets of stator windings and at least one cooling device, wherein the at least one cooling device is disposed between the respective adjacently disposed sets of stator windings. | 09-13-2012 |
20120256503 | STATOR ARRANGEMENT - A stator arrangement for an electrical machine is provided. The stator arrangement has a stator having a stator stack. The stator stack has a number of adjacently disposed metal plates. A number of radial channels are provided between respective groups of metal plates by spacers. At least one transition area from the stator stack in at least one respective radial channel is provided with a curved and/or chamfered and/or stepped shape. | 10-11-2012 |
20120267971 | Electrical Machine, Rotor for Such Machine and a Method for Its Manufacturing - The purpose is to accommodate large axial channels in a slim electric machine without sacrificing its torque density and radial dimensions. This is possible with a rotor ( | 10-25-2012 |
20120286596 | Cooling Combinations for Electric Machines - Some embodiments of the invention provide an electric machine module comprising a housing including a sleeve member and at least one end cap. In some embodiments, the sleeve member can include a first coolant jacket and a second coolant jacket. Also, in some embodiments, the end cap can include an end cap coolant jacket. Also, some embodiments provide an electric machine including stator end turns, housing at least partially enclosing the electric machine, and an end cap coolant jacket positioned substantially axially outward relative to at least one of the stator end turns. | 11-15-2012 |
20120286597 | Stator arrangement - A stator arrangement for an electric machine is provided. The stator arrangement includes a stator having a stator yoke with a number of stator slots, with each stator slot accommodating at least one set of stator windings and at least one cooling device in the shape of a duct-like pipe. The duct-like pipe is divided in two or more separate cooling channels. | 11-15-2012 |
20120286598 | Rotor of an Electric Generator for Generating Electricity in Power Plants - The invention relates to a rotor of an electric generator for generating electricity in power plants, comprising support elements ( | 11-15-2012 |
20120299403 | METHOD AND APPARATUS FOR COOLING AN ELECTRICAL MOTOR ROTOR - A vehicular device having a driven device and an electric motor coupled to and driving the driven device. The electric motor includes a rotor and a plurality of slots in the rotor. The rotor has a plurality of magnets. The plurality of slots includes a first slot associated with a corresponding one of the plurality of magnets thereby defining a first magnet. The first slot has a boundary that is partially defined by the first magnet. The first slot contains a fluid in direct contact with the first magnet. | 11-29-2012 |
20130002067 | Electric Machine Module Cooling System and Method - Embodiments of the invention provide an electric machine module including a housing. The housing can include a machine cavity, a coolant jacket, and at least one coolant aperture positioned through a portion of the housing so that the coolant jacket is fluidly connected to the machine cavity. In some embodiments, an electric machine can be at least partially positioned within the machine cavity and includes a stator assembly. The stator assembly includes a stator core with slots. The stator core can include a weld side and an insertion side. In some embodiments, conductors can be positioned in the slots so that portions of the conductors axially extend from the weld side and the insertion side of the stator core. In some embodiments, at least some of the conductors can be configured and arranged to define a substantially radially-directed aperture between portions of the conductors on the weld side. | 01-03-2013 |
20130009496 | ARRANGEMENT AND METHOD FOR COOLING AN ELECTRICAL MACHINE - In an arrangement for cooling an electrical machine, the electrical machine includes a rotor and a stator located at the end of an air gap from the rotor. The rotor includes at least one axial cooling channel originating from the first end of the rotor that is connected to at least two axially successive cooling channels that are substantially radial within the rotor. The stator is made of sheets using axially successive core modules. The stator includes a radial cooling channel between two core modules. Gaseous cooling agent is led to the cooling channels of the rotor and stator from the end of the rotor. The outer surface of the stator core module includes a cooling jacket by the length (L) of the stator core module at maximum, and liquid cooling agent is led to the cooling jacket. | 01-10-2013 |
20130015732 | Electric Machine ModuleAANM Bradfield; Michael D.AACI AndersonAAST INAACO USAAGP Bradfield; Michael D. Anderson IN US - Embodiments of the invention provide an electric machine module including an electric machine positioned with a housing. The brushless electric machine including a center axis of rotation and a support member with a field coil wound around a portion of the support member. The electric machine includes a rotor assembly circumscribing the support member and a shaft coupled to a rotor assembly. The machine also include a stator assembly including a distributed stator winding comprising a plurality of conductors positioned within the stator assembly. The module also includes a cooling system, which includes an inlet disposed through a portion of the housing, a first channel positioned within the support member that fluidly connects a second channel with the inlet. | 01-17-2013 |
20130015733 | TRANSVERSE FLUX MACHINEAANM Rasch; ReinhardAACI HechendorfAACO DEAAGP Rasch; Reinhard Hechendorf DEAANM Gruendl; AndreasAACI StarnbergAACO DEAAGP Gruendl; Andreas Starnberg DEAANM Hoffmann; BernhardAACI StarnbergAACO DEAAGP Hoffmann; Bernhard Starnberg DEAANM Loos; HeidimarieAACI TutzingAACO DEAAGP Loos; Heidimarie Tutzing DE - The invention relates to a transversal flux machine having a stator ( | 01-17-2013 |
20130020889 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes a rotor which has a rotor core formed by stacking magnetic plates having an annular plate shape in an axial direction, a permanent magnet is inserted into a magnet insertion hole formed in the rotor core, and a rotor shaft is inserted into a shaft insertion hole surrounded by an inner peripheral surface of the rotor core; and a stator. A radial communication passage is formed by a communication penetration hole group that is formed by sequentially communicating a plurality of the penetration holes from a shaft insertion hole to a magnetic resistance hole in the radial direction. The plurality of the penetration holes are divided into at least two specific magnetic plates and formed such that the radial positions of the penetration holes are different from each other and the penetration holes partially overlap each other when viewed in the axial direction. | 01-24-2013 |
20130038150 | ELECTRIC MACHINE MODULE COOLING SYSTEM AND METHOD - Embodiments of the invention provide an electric machine module. The module can include a housing, which can define a machine cavity. The housing can include a first axial end, a coolant jacket, and a plurality of coolant passages. In some embodiments, the coolant passages fluidly connect to the coolant jacket via at least one coolant aperture disposed through the housing. The housing can include a first guide positioned adjacent to the first axial end and extending into the machine cavity. The first guide is positioned so that a portion of the first guide is substantially adjacent to a portion of the rotor assembly. In some embodiments, the first guide is configured and arranged to guide a coolant toward the rotor assembly. | 02-14-2013 |
20130038151 | ROTARY MACHINE - On an inner circumference side of a stator fixed in an inner housing, a rotor is arranged. The rotor rotates through a bearing with respect to a center shaft that is a stationary shaft fixed to outer housings. Oil introduced into a rotor oil inlet path in the center shaft flows through a communication path and a clearance on an outer circumference of the center shaft into an oil path in the rotor. The oil flowing through the oil path cools a permanent magnet, lubricates the bearing, and is discharged from a rotor oil discharge port to the outside of the inner housing. The oil in the clearance is sealed with a thread seal, i.e., an inner thread formed in an inner face of an end ring and is prevented from flowing toward the bearing. | 02-14-2013 |
20130049498 | Electric Motors - An electric motor includes one or more separate coil sets arranged to produce a magnetic field of the motor. The electric motor also includes a plurality of control devices coupled to respective sub-sets of coils for current control. A similar arrangement is proposed for a generator. A coil mounting system for an electric motor or generator includes one or more coil teeth for windably receiving a coil for the motor and a back portion for attachably receiving a plurality of the coil teeth. A traction control system and method for a vehicle having a plurality of wheels independently powered by a respective motor. A suspension control system and method for a vehicle having a plurality of wheels, each wheel being mounted on a suspension arm of the vehicle and being independently powered by a respective motor. | 02-28-2013 |
20130062974 | ELECTRIC MACHINE MODULE COOLING SYSTEM AND METHOD - Embodiments of the invention provide an electric machine module. The module can include a housing, which can define a machine cavity. In some embodiments, a coolant jacket can be at least partially positioned within the housing. In some embodiments, a plurality of coolant apertures can be disposed through at least a portion of the housing to fluidly connect the coolant jacket and the machine cavity. The coolant apertures can comprise a first group configured and arranged to direct a first volume from the coolant jacket. The coolant apertures can comprise a second group configured and arranged to direct a second volume from the coolant jacket. In some embodiments, the first volume can be greater than the second volume. | 03-14-2013 |
20130062975 | WIND TURBINE ROTARY ELECTRIC MACHINE - A wind turbine rotary electric machine having a tubular body, in turn having a cylindrical wall; and a plurality of clips formed integrally with the cylindrical wall and configured so that each pair of facing clips defines a seat for housing an active sector. | 03-14-2013 |
20130076169 | ELECTRICAL MACHINE WITH REDUCED WINDAGE LOSS - An electrical machine includes a rotor located at a central shaft and a stator located radially outboard of the rotor and secured at a back iron. A first baffle is coupled to the central shaft at one axial end of the rotor, the baffle extending radially outwardly from the shaft toward a baffle cavity at the back iron. A flow of coolant is urged toward the baffle cavity along the baffle via centrifugal force. A method of flowing coolant through an electrical machine includes injecting a flow of coolant substantially radially into an electrical machine cavity. The flow of coolant is urged radially outwardly along a rotating baffle located at one axial end of a rotor of the electrical machine via centrifugal force and into a baffle cavity disposed at the back iron at a radial end of the baffle. | 03-28-2013 |
20130076170 | Stator for electric machine - An electric machine having a stator, the stator including a stator core of substantially annular shape. The stator core includes a plurality of stator poles protruding in a radial direction. A stator winding is wound around each of the stator poles. The stator winding have multiple coils and an end turn positioned at each axial end. Further, the stator winding having a gap defined between adjacent coils at the end turns to allow a cooling fluid to pass through. | 03-28-2013 |
20130076171 | ELECTRIC MACHINE MODULE COOLING SYSTEM AND METHOD - Embodiments of the invention provide a method of assembling an electric machine module, including assembling a stator core from a plurality of laminations. The stator core can include a plurality of slots, a first axial end, and a second axial end. The stator channels can be positioned through the stator core so that they can extend from the first axial end to the second axial end. The stator channels can include a first diameter. The method can provide forming a plurality of coolant members that include a second diameter that is less than the first diameter. The coolant members can be positioned within the plurality of stator channels and a pressurized fluid can be introduced into at least some of the coolant members to expand the coolant members within the stator channels so that second diameter is substantially similar to the first diameter. | 03-28-2013 |
20130113311 | INTERNAL COOLING OF MAGNETIC CORE FOR ELECTRIC MACHINE - A core for an electric machine includes a core component having a plurality of core teeth defining a plurality of core slots between adjacent core teeth of the plurality of core teeth. The plurality of core slots are receptive of one or more windings. A coolant flowpath through the core component is formed through at least one core tooth. The at least one core tooth has one or more coolant tube banks and one or more mixing chambers arranged in an alternating pattern along the at least one core tooth. | 05-09-2013 |
20130119794 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes a cylindrical stator and a frame including a first portion and a second portion, the first portion being formed by reducing the diameter of the frame at a part of an outer peripheral surface such that the thickness of the frame at the part is reduced, the second portion having a larger thickness than the first portion, the stator being provided to an inner peripheral surface of the frame. The frame includes a containing portion, a first coolant path, and a second coolant path. The containing portion contains a thermal component, the first coolant path is formed between the containing portion and the stator, and the second coolant path is formed in the second portion. | 05-16-2013 |
20130119795 | TOTALLY-ENCLOSED FAN-COOLED MOTOR - The totally-enclosed fan-cooled motor includes the stator; the rotor; the drive side bracket; the counter drive side bracket; a pair of the bearings; the external fan that sends cooling air to the stator; the internal fan; the heat radiator that is arranged on an outer side of the drive side bracket and is mounted on the rotation shaft; the cover that contains a joint, which connects the rotation shaft extending to an outer side of the drive side bracket of the motor and a reduction gear, and is provided in parallel with the joint; and the ventilation path that is arranged between the drive side bracket and an end of the cover, and includes the outlet causes the cooling air induced by rotation of the heat radiator to flow to the heat radiator and discharges the cooling air outside the motor. | 05-16-2013 |
20130127270 | METHOD OF WINDING A STATOR CORE WITH A CONTINUOUS CONDUCTOR HAVING A RECTANGULAR CROSS-SECTION AND A STATOR CORE - A method of inserting a continuous conductor having a rectangular cross-section into slot segments formed in a stator core includes deforming in a first direction a core member having a first end portion that extends to a second end portion to widen an opening at end portions of the slot segments, inserting one or more continuous conductors having a rectangular cross-section into select ones of the slot segments, and deforming in a second direction the core member to narrow the opening at end portions of the slot segments. | 05-23-2013 |
20130127271 | ELECTRIC MACHINE HAVING A HEAT DISSIPATING CONSTRUCTION - An electric machine comprises an outer casing ( | 05-23-2013 |
20130134808 | STATOR AND ASSEMBLY METHOD - An exemplary stator disk of an electric motor stator includes a set of recesses. Each recess being configured to receive a cooling pipe. The stator disk includes one or more positioning elements for aligning the stator disk with another stator disk. The one or more positioning elements being positioned to the stator disk such that when the stator disk is set to a rotated position with respect to the other stator disk in order to align the recesses of the disks for receiving of cooling pipes, the positioning elements of the two disks become only partly aligned with each other. | 05-30-2013 |
20130140924 | ELECTRIC MACHINE MODULE COOLING SYSTEM AND METHOD - Embodiments of the invention provide an electric machine module. The module can include a housing, which can define a machine cavity. In some embodiments, a coolant jacket can be at least partially positioned within the housing. In some embodiments, a plurality of coolant apertures can be disposed through at least a portion of the housing. A stator assembly can be at least partially disposed within the housing and can include a plurality of coolant channels being in fluid communication with the machine cavity. Each of the coolant channels includes at least one radial subunit and at least one axial subunit. The radial subunits are fluidly coupled to some of the coolant apertures so that the coolant jacket is in fluid communication with the machine cavity via the coolant channels. | 06-06-2013 |
20130147292 | COOLING PLATE FOR ELECTRIC MOTOR WITH IMPROVED HEAT RADIATION CAPABILITY - In accordance with the present invention, there is provided a cooling plate including a plurality of plate members stacked on one another between an electric motor and a coupled body to which the electric motor is coupled, wherein at least one of the plurality of plate members has a penetration groove extending through the plate member in a thickness direction and extending in the plate member in a plane direction orthogonal to the thickness direction, the penetration groove defining a coolant supply channel for supplying a coolant. | 06-13-2013 |
20130169080 | COOLING OF STATOR CORE FLANGE - An approach for cooling a stator core flange is provided. In one aspect, a pair of stator flanges each disposed at opposing ends of a stator core assembly maintains a compressive load on the stator core assembly. Heat transport tubes may be located about at least one of the stator flanges at an end of the stator core assembly to redistribute heat therefrom. | 07-04-2013 |
20130169081 | SEGMENT ROTOR FOR AN ELECTRICAL MACHINE - A rotor for an electrical machine has a plurality of segments. The segments have permanent magnets. A fan can be arranged at least between two segments. The plurality of segments jointly form a rotor core having axial ends, with end sheets respectively attached to the axial ends of the rotor core. | 07-04-2013 |
20130181555 | STATOR FOR ELECTRIC ROTATING MACHINE - A stator coil includes first to fourth in-slot portions and first and second turn portions. Both the first and third in-slot portions are received in one slot of a stator core, while both the second and fourth in-slot portions are received in another slot. The first and second turn portions both protrude from an axial end face of the stator core and respectively connect the pair of the first and second in-slot portions and the pair of the third and fourth in-slot portions. The second turn portion is located inside the first turn portion. When viewed along an axial direction of the stator core, the first and second turn portions extend so as to cross each other with a reference line C interposed therebetween; the reference line C is defined to extend along a circumferential direction of the stator core through an intersection between the first and second turn portions. | 07-18-2013 |
20130200734 | ELECTRICAL MACHINES - The invention relates to a component such as a rotor or stator for an electrical machine. The component includes a plurality of axially adjacent stacks of laminations. At least one pair of adjacent stacks are spaced apart in the axial direction by spacer means such that a passageway or duct for cooling fluid, e.g. air, is formed therebetween. The spacer means comprises a porous structural mat of metal fibres. The cooling fluid may flow through the spaces or voids between the fibres. | 08-08-2013 |
20130200735 | Method and Apparatus for Permanent Magnet Attachment in an Electromechanical Machine - An apparatus and method for the installation and removal of permanent magnets in a permanent magnet electromechanical machine, for example a wind turbine power unit generator. A magnet holder is mounted on a magnet carrying structure such as a rotor. Permanent magnets may be inserted into and removed from the magnet holder after the electromechanical machine is assembled. The magnet holders define passages for airflow between the inside top and magnet surface. In this manner, permanent magnets may be installed on the magnet carrying structure and provided with additional cooling via said passages. Further, the holders may be configured to secure the magnets by an interference fit, without using bolts or adhesives, to facilitate both assembly and removal for maintenance and repair. | 08-08-2013 |
20130207492 | ELECTRIC MACHINE MODULE COOLING SYSTEM AND METHOD - Embodiments of the invention provide an electric machine module including a housing. The housing can include a machine cavity. In some embodiments, an electric machine can be at least partially positioned within the machine cavity and can include a stator assembly. The stator assembly includes a stator core with slots. In some embodiments, conductors can be positioned in the slots. The conductors include a turn portion extending between leg portions. The leg portions include an angled portion and a connection portion. The conductors are disposed within the plurality of slots so that the angled and connection portions extend from the stator core at a first axial side. At least one insulation member can be disposed over at least some of the leg portions so that the connection portions are at least partially uncovered. | 08-15-2013 |
20130207493 | ROTOR COOLING STRUCTURES - A rotor defines an axial direction and a radial direction relative to an axis of rotation and includes an annular hub and a core disposed radially outward of the annular hub. The core defines a first axial side and a second axial side. First radial feed holes are formed in the annular hub, and are located between the first and second axial sides. Axial channels are formed between the core and the annular hub, and are in fluid communication with the first radial feed holes and span substantially between the first and second axial sides. The rotor also includes a first member and a second member, adjacent to the first and second axial sides, respectively. First and second apertures are formed in the first and second members, respectively. Each of the first and second apertures is in fluid communication with one of the axial channels. | 08-15-2013 |
20130234545 | COOLING ARRANGEMENT FOR END TURNS AND STATOR IN AN ELECTRIC MACHINE - An electric machine includes a stator having an outer circumference. Spaced apart first walls are arranged about the outer circumference and provide generally parallel first channels. A second wall adjoins the first wall and is arranged about the outer circumference providing a second channel in fluid communication with the first channels, thus, providing a tortuous fluid flow path about the circumference. The first and second channels have an inner surface. A structure is provided within at least one of the first and second channels. The structure has an outer surface spaced radially outward from the inner surface and at least partially defines the tortuous flow path between the outer and inner surfaces. The stator includes an end turn. An end cap extends axially and radially outward from the stator and provides an enclosure about the end turn in fluid communication with the exit associated with the flow path. | 09-12-2013 |
20130234546 | DOUBLE-ROTOR MOTOR - Provided is a double-rotor type motor including: a stator; a double-rotor that is positioned at a certain gap on an outer surface and an inner surface of the stator; a rotor support on which the double-rotor is integrally formed and a plurality of air passages are radially penetratively formed; and a heat dissipation unit that is integrally formed with the rotor support and that forcibly ventilates outer air into the air passages during rotation of the rotor, to thereby dissipate heat generated from the stator. Thus, outer air may be forcibly ventilated to the stator, to thereby improve the heat dissipation efficiency of the stator. | 09-12-2013 |
20130249333 | ELECTRIC MACHINE AND METHOD TO RETROFIT AN ELECTRIC MACHINE - The electric machine ( | 09-26-2013 |
20130278092 | STATOR COOLING CHANNEL TOLERANT TO LOCALIZED BLOCKAGE - A stator core of a motor or generator includes a stacked stator laminations that form a plurality of outwardly extending fins and a plurality of cooling channels between the fins. Each stator lamination includes a gap larger than a cooling channel. Each stator lamination is rotated relative to a previous stator lamination in the stack. The gaps of adjacent stator laminations overlap such to connect a cooling channel to adjacent cooling channels. | 10-24-2013 |
20130278093 | Airflow Management - The present invention relates to an airflow management system, particularly for a lawn mower, especially a robotic lawn mower. We describe a battery-operated robotic lawn mower with an active airflow management system, said active airflow management system comprising: at least one first air vent positioned on an underside of said mower; at least one second air vent; an internal housing surrounding a motor; a fan; and at least one cooling air channel located within said housing and around said motor. An air flow path is defined between the first and the second vents; and said at least one second vent has a lower air flow capacity than an air flow capacity of said at least one cooling air channel, such that in operation, a greater volume of air is drawn through the first vent than the second. | 10-24-2013 |
20130293042 | AIR-COOLED ELECTRICAL MACHINE - An electrical machine, especially permanent magnet machine, is comprised of a stator and a rotor rotatable relative to the stator. The rotor and stator are separated from each other by an air gap. A boundary layer control maintains a desired boundary layer thickness in the air gap. The boundary layer control maintains optimal cooling, which minimizes the electrical machine's overall dimensions while maximizing its power density. | 11-07-2013 |
20130320786 | CONTROLLER-INTEGRATED ROTATING ELECTRICAL MACHINE - A first cooling air passage is formed to let first cooling air generated by a cooling fan in from a radially outside of an inverter apparatus to cool a heat sink and out through exhaust holes provided on an outer peripheral side of a rear bracket by passing an inner periphery of the rear bracket. Also, a second cooling air passage is formed to let second cooling air generated by the cooling fan into a hollow portion of the inverter apparatus from an axially rear of a rotation shaft to cool a brush holder and a magnetic pole position detection sensor and out through the exhaust holes by passing the inner periphery of the rear bracket. Hence, cooling performance for the magnetic pole position detection sensor and the brush holder may be enhanced and an axial dimension may be reduced. | 12-05-2013 |
20130320787 | BRUSHLESS ALTERNATOR - A brushless alternator has a housing with a front portion and a rear portion. A stator assembly, rotor assembly, and coil support are positioned within the housing. The coil support has a shank portion of a first outer diameter and a base portion of a second outer diameter greater than first outer diameter. The base portion includes a plurality of air flow openings that extend through a second sidewall. A rectifier and regulator assembly is positioned on the outside of the rear portion of the housing. A front fan circulates air across the stator assembly at the front portion of the housing. A rear fan creates a cooling flow of air through flow openings of the coil support to circulate air across the regulator and rectifier assembly and the stator assembly. | 12-05-2013 |
20130342050 | ELECTRIC MOTOR ARRANGEMENT FOR A MEDICAL HANDPIECE - An electric motor arrangement for a medical, especially dental, tool handle, which is extremely compact and resistant to sterilizing temperatures due to a plurality of advantageous embodiments. The electric motor arrangement is characterized by the following properties: the use of a light source based on SMD-LED or LED as a semiconductor chip; the shortening of the INTRAmatic coupling to between 20 mm and 25 mm; a hermetically extruded stator comprising integrated media tubes and molded connection sockets; the stator winding is embodied as a coil segment winding instead of an H winding or triangle; and the winding head has openings for media tubes. | 12-26-2013 |
20140015355 | Electric Machine Cooling Arrangement And Method - An electric machine coupled to a driven device in a vehicle, the electric machine including a stator and a housing containing the stator. The housing has at least one cooling channel around at least a portion of an internal circumference of the housing. The cooling channel is defined by a first housing portion and a second housing portion, the first housing portion being sealed to the second housing portion. | 01-16-2014 |
20140028123 | VENTING DEVICE FOR ELECTRIC MACHINE - A venting device to define a venting pathway between adjacent stacked laminations of a stator assembly of an electric machine is provided. The venting device comprises a first mesh plate and a second mesh plate. The first mesh plate includes a set of angled first slats and a set of first interconnecting members connecting adjacent first slats. The second mesh plate includes a set of angled second slats and a set of second interconnecting members. The set of angled second slats are disposed above the set of first slats. The set of second interconnecting members connect adjacent second slats and are positioned offset from the set of first interconnecting members. | 01-30-2014 |
20140028124 | ELECTRIC MACHINE - An electric machine includes a housing which accommodates a stator and a rotor rotationally supported about an axis of rotation, and has a front/rear air inlet opening on a top face and an air outlet opening therebetween. A front/rear air conveying element draws into the air inlet openings air which is discharged from the air outlet opening during operation. A cooler is mounted on the top face of the housing, covering the air inlet openings and the air outlet opening in a hood-like manner, such that discharged air is fed back to the air inlet openings. The cooler has a front/rear partition arranged between the air outlet opening and the corresponding air inlet opening and extending upward from the top face. Air guiding elements are arranged in the housing and/or in the cooler for feeding discharged air at least partially to the respective other air inlet opening. | 01-30-2014 |
20140054990 | ELECTRIC MACHINE - An electric machine with a rotor ( | 02-27-2014 |
20140062231 | WIND TURBINE - A wind turbine having an electric machine, in turn having a stator, and a rotor which rotates about an axis of rotation with respect to the stator; the rotor having a plurality of magnetized modules, and a rotor cylinder which extends circumferentially, rotates about an axis of rotation, and is configured to support the plurality of magnetized modules; and wherein the rotor cylinder is made of nonmagnetic material. | 03-06-2014 |
20140062232 | FAN AND ELECTRIC MACHINE ASSEMBLY AND METHODS THEREFOR - In one embodiment, a fan for a rotating device having a shaft with an axis of rotation is provided. The fan includes a base plate having a front surface, a rear surface, and a hub configured for coupling to the shaft. The fan further includes at least one blade projecting from the front surface of the base plate substantially perpendicular to the base plate. The base plate is contoured to direct air at an acute angle relative to the axis of rotation. | 03-06-2014 |
20140070640 | COOLING DUCTS IN AN ELECTRO-DYNAMIC MACHINE - A generator stator core assembly is disclosed. The assembly includes a plurality of packages of stacked laminations, each package including an outermost lamination having a plurality of radially extending spacer blocks. The plurality of radially extending spacer blocks and adjacent axially spaced laminations define a radial cooling duct, and the outermost lamination includes a plurality of recesses such that a flow through the cooling duct flows over the plurality of recesses. In one embodiment, at least one adjacent axially spaced lamination defining the radial cooling duct also includes a plurality of recesses. | 03-13-2014 |
20140070641 | INDUCTION MOTORS INCLUDING VENT SPACERS, ROTOR CORE ASSEMBLIES INCLUDING VENT SPACERS, AND METHODS OF OPERATING SAME - Vent spacers and induction motor rotor core assemblies for induction motors are disclosed. The induction motor rotor assembly includes at least two rotor packages, each having axial sidewalls, a radial periphery, and axial vents, and a vent spacer positioned between opposing axial sidewalls of the at least two rotor packages. The vent spacer has a hub and a plurality of radially-extending fins coupled to the hub, the fins extending approximately to a radial periphery and extending axially between the opposed axial sidewalls to form a plurality of radial cooling channels extending between the sidewalls. Induction motors and methods of operating the induction motors are disclosed, as are other aspects. | 03-13-2014 |
20140070642 | APPARATUS, SYSTEMS, AND METHODS FOR INCREASING AIRFLOW THROUGH INDUCTION MOTORS - Induction motors may have a rotor core assembly that includes a plurality of rotor laminations having an arrangement of vents therein. The arrangement of vents may provide increased airflow through the induction motor without adversely affecting the electromagnetic properties of the motor. The arrangement of vents includes first and second circular rows of vents, wherein each vent of the first row may be radially aligned with a respective vent of the second row, and each radially aligned pair of first and second row vents may be radially aligned with a respective conductor bar slot in the rotor lamination. The number of rotor bar slots may equal the number of first row vents and the number of second row vents. Systems and methods of facilitating ventilation in an induction motor are provided, as are other aspects. | 03-13-2014 |
20140084721 | MOTOR ASSEMBLY COOLING ARRANGEMENT AND METHOD OF COOLING A MOTOR ASSEMBLY - A motor assembly cooling arrangement includes a first plurality of laminations having a first radially inner surface defining a centrally disposed aperture and a first radially outer surface. Also included is a second plurality of laminations having a second radially inner surface substantially corresponding to the first radially inner surface and a second radially outer surface having a plurality of circumferentially spaced fins extending radially outwardly from the second radially outer surface. Further included is at least one axial cooling channel extending proximate the first radially outer surface and the second radially outer surface, the at least one axial cooling channel defined by the plurality of circumferentially spaced fins. | 03-27-2014 |
20140091652 | ELECTRIC MACHINE INCLUDING A HOUSING HAVING MATERIALLY INTEGRALLY FORMED COOLANT CHANNELS AND AN OUTER SLEEVE - An electric machine housing includes a housing body having an outer surface provided with a plurality of materially integrally formed ribs defining a plurality of coolant channels. Each of the plurality of materially integrally formed ribs has an outer surface portion. A sleeve is provided on the housing body extending about the outer surface. The sleeve has an inner surface section that is matingly engaged with the outer surface portion of each of the materially integrally formed ribs. | 04-03-2014 |
20140091653 | MOTOR HAVING HIGHLY-EFFICIENT AIR-COOLING STRUCTURE - A motor with an air-cooling structure having high cooling efficiency and capable of avoiding an increase in the size of the motor. A stator of the motor has an air flow channel being formed in the stator near outer circumferences of the slots. Air conveyed from a fan motor collides with an inner surface of an end at a spindle side of the stator, while cooling the slots through the air flow channel. The flowing direction of air which collides with the housing is inverted by a redirecting part, and the air is returned to the fan motor side while cooling the outside of the stator. | 04-03-2014 |
20140097715 | SYSTEMS AND METHODS FOR COOLING A DRIVE END BEARING - Certain embodiments provide systems and methods for cooling a drive end bearing. The system may include an alternator including a drive end bearing, a drive end fan and a front housing face. The drive end fan may include a shaft aperture and auxiliary air flow inlet apertures positioned circumferentially around the shaft aperture. The front housing face may include auxiliary fins coupled to the drive end bearing. The auxiliary fins may protrude from the front housing face. The auxiliary fins may be arrayed axially on the front housing face. In various embodiments, the drive end fan is rotated to draw air through the auxiliary air flow inlet apertures and adjacent to at least a portion of auxiliary fins of the front housing face. The at least a portion of the auxiliary fins transfers heat from the drive end bearing to the air. | 04-10-2014 |
20140117798 | STATOR COOLING CHANNEL TOLERANT TO LOCALIZED BLOCKAGE - A motor is provided including a stator core having a plurality of stator fins projecting outwardly from the stator core. A plurality of stator cooling channels is defined between adjacent stator fins. A flow mixer ring is axially aligned with the stator core and separated therefrom by an axial gap. The flow mixer ring includes a plurality of ring fins projecting inwardly from an interior surface and a plurality of ring cooling channels defined between the plurality of ring fins. The plurality of ring fins extends from a first surface over at least a portion of an axial length of the flow mixer ring. | 05-01-2014 |
20140139058 | STATOR STRUCTURE - A stator structure includes a stator core, multiple windings and a frame. The stator core has multiple teeth and multiple grooves. The core has a first side and a second side opposite to each other. The teeth protrudes from the first side. The grooves are recessed inward from the second side. The windings are wound around the teeth respectively. A frame together with a plurity of cooling passages is cast to the grooves on the second side. | 05-22-2014 |
20140145528 | AXIAL FLUX ELECTRICAL MACHINES - An axial flux electrical machine comprises a substantially sealed housing ( | 05-29-2014 |
20140145529 | MOTOR AIR FLOW COOLING - In one possible embodiment, an aircraft electric motor cooling system is provided having an airflow path through a spinner which includes a first airflow path between an inner rotor and a stator, a second airflow path between an outer rotor the stator and a third airflow path along an outer surface of the outer rotor. | 05-29-2014 |
20140159518 | STATOR WINDING OF A DIRECTLY COOLED TURBOGENERATOR - A stator winding of a directly cooled turbogenerator comprises directly gas cooled double Roebel bars is arranged as active parts in slots of a stator body. Each double Roebel bar has two single Roebel bars, which includes each a stack of a plurality of transposed individual strands, and are separated by an intermediate stack of cooling tubes. Mounting space is saved by constructing, for the compensation of stray field voltages, at least one double Roebel bar as a cross-over bar with the strands being transposed over the stack of cooling tubes in the middle in order to change the sides of the single Roebel bars along the active part. | 06-12-2014 |
20140167537 | COOLANT SUPPLYING AND COLLECTING APPARATUS AND MOTOR INCLUDING THE SAME - The coolant supplying and collecting apparatus is inserted along an inner diameter of a rotary shaft of a motor. The apparatus includes a first body section having a hole section formed at one side thereof, and a second body section inserted into and fixed to the first body section. The apparatus is configured to provide a moving path of a fluid along an inner diameter thereof. A channel section is formed between an inner circumferential surface of the first body section and an outer circumferential surface of the second body section and extends in a longitudinal direction to provide a moving path of the fluid in the hole section direction. | 06-19-2014 |
20140183991 | Apparatuses And Methods For Cooling Electric Machines - Cooling apparatuses and methods comprising cooling apparatuses, such as those configured to be coupled to and/or cool electric machines (e.g., motors, generators, and the like). | 07-03-2014 |
20140203675 | ROTATING ELECTRIC MACHINE - The rotating electric machine is configured in such a way that a surface of the heat sink, on which the cooling fins of the heat sink are formed, faces the housing; and a plate, which blocks the surface of the housing facing the heat sink and forms a wind passage between the heat sink and the plate, intervenes between the cooling fins and the surface of the housing facing the heat sink; and outside air is aspirated from an inlet formed on the protective cover, and then, the outside air is passed through the wind passage formed between the heat sink and the plate so as to be passed through a window formed on the housing, and is exhausted, by the cooling fan of the rotor, from an outlet formed on the housing. | 07-24-2014 |
20140232220 | ROTOR OF AN ELECTRIC MACHINE - A rotor of an electric machine including a rotor body, axial slots in the rotor body, a plurality of tubular conductive bars in each axial slot, and apertures in at least some of the tubular conductive bars. The apertures are provided on walls of tubular conductive bars that intersect a radial axis of the rotor body. The rotor includes tubular elements that are housed in at least some of the holes and pass through at least one tubular conductive bar. | 08-21-2014 |
20140252894 | ROTOR COMPRISING INTERPOLAR REGIONS WITH COOLING CHANNELS - The invention relates to a rotor for a rotary electric machine, extending along a longitudinal axis and including: an assembly of electrical sheets forming projecting poles, two projecting poles defining an interpolar region therebetween; and at least two internal cooling channels formed in the assembly of electrical sheets in at least one interpolar region. | 09-11-2014 |
20140265662 | Micro-Channel Heat Exchanger Integrated Into Stator Core of Electrical Machine - An electric machine has a stator that comprises a plurality of laminations with an outer periphery, and each of the laminations has teeth about a central opening such that when the laminations are stacked side-by side to form the stator core, the plurality of teeth of adjacent laminations cooperate to form slots disposed circumferentially about the central opening that are configured to receive a plurality of stator windings. Each of the laminations has a plurality of cooling apertures angularly spaced about the central opening. The cooling apertures of adjacent laminations cooperate to form cooling manifolds that extend along a length of the stator core. A portion of the laminations has their cooling apertures offset from other laminations in the stack in a manner to create a plurality of flow path transverse to the manifolds and angularly between laminations and adjacent manifolds. | 09-18-2014 |
20140265663 | POWER ELECTRONICS ATTACHMENT COVER - An electric machine includes a housing having inner and outer sheet metal members attached to one another to form a coolant channel therebetween, a plurality of power electronic components mounted to an axial end of the electric machine adjacent the coolant channel, and a cover secured to the axial end for enclosing the electronic components. A method of cooling an electric machine includes forming a coolant channel at an axial end of the machine, between inner and outer sheet metal members, attaching a power electronics component to the outer sheet metal member proximate the coolant channel, thereby cooling the electronics component by conduction with the coolant channel, and securing a cover to the axial end for enclosing the power electronics component. | 09-18-2014 |
20140265664 | AIR-COOLED ELECTRIC MACHINE AND METHOD OF ASSEMBLING THE SAME - In one aspect, an electric machine is provided. The electric machine includes a housing including at least one air intake, an air outlet, and an air passage extending between the at least one air intake and the air outlet. The electric machine also includes a first heat sink positioned at least partially within the air passage, and a second heat sink positioned at least partially within the air passage downstream of the first heat sink. A cooling airflow through the at least one air intake flows through the air passage to cool the first heat sink and the second heat sink before the cooling airflow is exhausted through the air outlet | 09-18-2014 |
20140265665 | COOLING ARRANGEMENT FOR AN ELECTRIC MOTOR - An electric motor includes a stator operable to produce a magnetic field and defining an opening, and a rotor at least partially disposed within the opening. The rotor includes a shaft extending along a rotational axis, a first rotor magnetic core portion including a plurality of laminations stacked contiguously on the shaft, and a second rotor magnetic core portion coupled to the plurality of laminations. The first rotor magnetic core portion and the second rotor magnetic core portion cooperate to define the rotor magnetic core. A plurality of windings is coupled to the rotor magnetic core and an air flow path is formed as part of the second rotor magnetic core portion. The air flow path includes an axial portion that passes through the shaft axially along the rotational axis and a radial portion that extends radially outward through the second rotor magnetic core portion. | 09-18-2014 |
20140265666 | Micro-Channel Heat Exchanger for Stator of Electrical Machine with Supply Header - An electric machine has a stator that comprises a plurality of laminations with teeth and cooling apertures about a central opening. When the laminations are stacked to form the stator core, the teeth of adjacent laminations cooperate to form slots disposed circumferentially about the central opening that are configured to receive a plurality of stator windings, and the cooling apertures angularly spaced about the central opening cooperate to form cooling manifolds that extend along a length of the stator core. A portion of the laminations has their cooling apertures offset from other laminations in the stack in a manner to create a plurality of flow paths transverse to the manifolds. The transverse flow paths extend angularly between laminations and adjacent manifolds. A header assembly directs flow into and out of the stator core. | 09-18-2014 |
20140265667 | ELECTRICAL MACHINE HAVING COOLING FEATURES - An electrical machine has passages in the rotor. The passages have an inlet port and an exit port disposed at different locations. The passages remove heat from the electrical machine during operation. Another embodiment is an electrical machine rotor. The rotor has passages that remove heat from an electrical machine during operation. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for electrical machines and the cooling of electrical machine rotors and/or stators. | 09-18-2014 |
20140265668 | ROTOR COMPRISING POLE SHOES WITH COOLING CHANNELS - The present invention relates to a rotor for a rotary electric machine, extending along a longitudinal axis, including: projecting poles having pole shoes, and at least one internal cooling channel extending axially along at least one pole shoe. | 09-18-2014 |
20140292122 | MOTOR COOLING APPARATUS AND METHOD - A driver system, cooling apparatus for a driver system, and method are provided. The driver system includes a driver, a device configured to move a cooling fluid, and a shroud disposed at least partially over the driver. The shroud includes a plurality of inlet orifices and a plurality of outlet orifices in fluid communication with the device, and a plurality of fins extending at least partially between the shroud and the driver, at least partially in the driver, or both, the plurality of fins being spaced apart and defining flowpaths therebetween, wherein the flowpaths communicate with the inlet orifices and the outlet orifices. | 10-02-2014 |
20140292123 | METHOD OF WINDING A STATOR CORE WITH A CONTINUOUS CONDUCTOR HAVING A RECTANGULAR CROSS-SECTION AND A STATOR CORE - A method of inserting a continuous conductor having a rectangular cross-section into slot segments formed in a stator core includes forming a core member having a plurality of slot segments each having an opening and inserting a stator winding having a plurality of phases into select ones of the slot segments. Each of the plurality of phases has at least one conductor including a plurality of substantially straight segments alternately connected by a plurality of end loop segments. A section of the at least one conductor includes three consecutive end loop segments and three consecutive straight segments formed from a single continuous conductor. The method further includes narrowing the opening of each of the plurality of slot segments by forming an annular stator core having a central axis. The three consecutive straight segments are substantially similarly radially spaced from the central axis. | 10-02-2014 |
20140306558 | CONNECTING SYSTEM FOR CONNECTION OF AN ELECTRIC MACHINE TO A CONVERTER - The arrangement of an electric machine, a connecting system and a converter, includes the connecting system connected between the electric machine and the converter. The connecting system has an enclosure that houses non-shielded conductors each non-shielded conductor is connected between a phase of the electric machine and the inner side of the converter. The non-shielded conductors of the connecting system that are connected to an operating phase of the electric machine are adjacent to conductors of the connecting system that are not connected to operating phases of the electric machine. | 10-16-2014 |
20140306559 | Rotating Electrical Machine - A rotating electric machine ( | 10-16-2014 |
20140327330 | DYNAMOELECTRIC MACHINE HAVING ENHANCED ROTOR VENTILATION - A rotor and a dynamoelectric machine including a rotor are disclosed. In an embodiment, the rotor includes a rotor body having a plurality of axially extending slots disposed radially about the rotor body, and at least one coil having at least one turn positioned within each of the plurality of axially extending slots. The rotor further includes a plurality of subslots disposed in the rotor body such that each subslot extends axially through the rotor body parallel to an axis of rotation of the rotor body, and is in fluid communication with a radially inner end of a slot; a passageway extending substantially radially outwardly along each axially extending slot for cooling the at least one turn disposed in the slot; and a retaining member in each of the slots for retaining the at least one turn within the slot. Various embodiments provide ventilation via the passageway for cooling the rotor coils. | 11-06-2014 |
20140333163 | EMBEDDED PERMANENT MAGNET ROTARY ELECTRIC MACHINE - Ventilation apertures are respectively formed circumferentially so as to pass axially through an inner circumferential side of a rotor core, rotor grooves are respectively formed circumferentially on an outer circumferential surface of the rotor core so as to have groove directions in an axial direction, and a centrifugal fan is fixed to the shaft at an end of the rotor core near the front frame, and a cyclic path is formed in which, during operation of the centrifugal fan, cooling air flows into the ventilation apertures from near a rear frame, passes through the ventilation apertures and flows out near the front frame, flows radially outward near the front frame and flows into the rotor grooves, passes through the rotor grooves and flows out near the rear frame, and flows radially inward near the rear frame and flows into the ventilation apertures. | 11-13-2014 |
20140346906 | MOTORIZED DRUM SHELL ARRANGEMENT - A motorized drum having a drum shell with a motor therein, the motor having a stationary shaft, stator windings, and a stator support structure that is affixed to the stationary shaft. A rotor rotates coaxially around the stator, and a cycloidal reducer has an output that rotates at a reduced rate. The reducer output is rotationally fixed to, and is disposed within, the drum shell. An input gear of the reducer received a hollow eccentric input shaft, and is urged into eccentric motion as the input shaft rotates. The output gear urges the drum shell into rotation at same rate of rotation as the output gear. An harmonic drive speed reducer that has an input shaft provides rotatory motion to a wave generator that is disposed against a flexible splined member. The flexible splined member engages a rigid circular spline member at two radially opposed zones. Induction and permanent magnet forms of operation are used. | 11-27-2014 |
20140368065 | Stator/rotor lamination sheet for stator/rotor laminations of generators and electric motors, stator/rotor lamination with such a stator/rotor lamination sheet as well as method for manufacturing a stator/rotor lamination sheet - A stator/rotor lamination sheet for a stator/rotor lamination of generators and electric motors has spacers, wherein the spacers are monolithic lamination sections that are bent out of a lamination sheet plane about a bending edge and create corresponding recesses in the lamination sheet, wherein the spacers transversely protrude from the lamination sheet plane. A method for manufacturing the stator/rotor lamination sheet provides that a stator/rotor lamination sheet is punched out of a metal sheet; lamination sections are partially punched out out of the metal sheet; and the partially punched-out lamination sections are bent out of a lamination sheet plane of the lamination sheet to form spacers of the lamination sheet. | 12-18-2014 |
20140375155 | MOTOR GENERATOR FOR VEHICLE - A motor generator for a vehicle includes a housing having a through hole along a central axis thereof, with a protrusion protruding outwards along a circumference of the through hole. A rotating shaft is disposed in the housing in such a way that a first end thereof is exposed outside through the through hole. A pulley is disposed outside the housing in such a way that the first end of the rotating shaft is inserted into and coupled to a central portion of the pulley. A rim of the pulley is surrounded by the protrusion and a central portion of the pulley passes through the through hole, so that a watertight flange having a larger diameter than the through hole is disposed in the housing. | 12-25-2014 |
20150015098 | ROTOR WITH COOLING PASSAGE AND MOTOR HAVING THE SAME - In a rotor of a motor according to the present invention, a plurality of flow passages spaced apart from each other around an axis of rotation, each of which extends so as to be slanted relative to an axis of rotation and open to an exterior space of the rotor at both ends of the rotor. The flow passages are configured so that adjacent flow passages are slanted alternately in opposite directions and that a fluid for cooling the rotor circulates through the flow passages. | 01-15-2015 |
20150042187 | ENHANCED ELECTRONICS COOLING FOR ELECTRIC MACHINES - An electric machine including a rotor and a stator operably coupled with the rotor, electronic components, and a drive shaft disposed along a central axis of the machine. A bearing support supportively surrounds the drive shaft, and a frame end is connected to the stator and has a backface portion to which the electronic components are mounted. The backface portion defines a frame airflow space through which cooling air can flow. The backface portion is sloped relative to the central axis and defines a frame air inlet through which cooling air is received into the frame airflow space, and the frame air inlet is located between the bearing support and the backface portion. | 02-12-2015 |
20150042188 | ELECTRIC MACHINE HAVING A PHASE SEPARATOR - The invention relates to an air-cooled dynamoelectric machine ( | 02-12-2015 |
20150054363 | CONTROLLER-INTEGRATED ROTATING ELECTRICAL MACHINE - An inverter device is provided with a hollow portion in a center portion of a rotation shaft of a rotating electrical machine. The rotating electrical machine has a first cooling air passage for cooling air generated by a cooling fan to flow in from an outer side in a radial direction of the rotating electrical machine, then to cool a heat sink, and to be discharged through ventilation holes provided to a rear bracket on an outer peripheral side by passing an inner periphery of the rear bracket, and a second cooling air passage for cooling air to flow into the hollow portion from the rear in the axial direction, then to cool a brush holder and a magnetic pole position detection sensor, and to be discharged through the ventilation holes by passing the inner periphery of the rear bracket. | 02-26-2015 |
20150061427 | ELECTRIC MACHINE - An electric machine can include a stator, a rotor frame and a pole arrangement with: plural segment pieces disposed circumferentially around, and fastened to, the rotor frame; permanent magnet pieces positioned on inclined side edges of each segment piece; and plural pole pieces disposed circumferentially around the rotor frame and disposed alternatingly with the segment pieces. The magnet pieces are pressed between inclined side edges of the pole pieces and the inclined side edges of the segment pieces. The segment pieces, the permanent magnet pieces and the pole pieces form a closed ring around the outer surface of the rotor frame, with plural such rings being arranged after each other in an axial direction. An axial air channel can pass through the rings, and at least one radial air duct (R | 03-05-2015 |
20150069867 | ELECTRIC MACHINE AND METHOD FOR REWINDING IT - The method for rewinding and electric machine includes removing the original stator bars from the slots, removing the original supports from the slots, and providing new supports into the slots, wherein the new supports defining cooling channels that extend over at least a portion of the slot, providing new stator bars into the slots. | 03-12-2015 |
20150076942 | ELECTRIC MOTOR - An electric motor with a stator housing ( | 03-19-2015 |
20150084455 | Flux Directing, Pole Span Setting, Feature on Rotor Lamination of Air-Cooled Electric Motor/Generator - A rotor having a plurality of laminations joined together and mountable on a shaft for rotation relative to a stator of a rotary electric machine arrangement has a solid section that surrounds an opening within which the shaft is receivable. The solid section includes an outside diameter, magnet receiving voids, and steps delimiting a plurality of pole spans from flux directing features at sides of each of the pole spans. Adjacent flux directing features between adjacent pole spans are disposed on opposite sides of scalloped areas or other such recesses, permitting cooling air flow past the rotor. The invention also concerns a lamination usable together with additional laminations to provide such a rotor, as well as an arrangement, such as an AC motor, generator, or motor/generator, including a stator and such a rotor. | 03-26-2015 |
20150108858 | FAN MOTOR APPARATUS HAVING IMPROVED HEAT-RADIATION PERFORMANCE - A fan motor apparatus having an improved heat-radiation performance includes a stator including an electronic device; a central shaft which is fixed onto the upper surface of the stator; a rotator mounted rotatably with the respect to the stator by being rotatably coupled to the central shaft; a heat-radiating fin portion provided on an inner surface of the rotator to generate wind toward the stator when the rotator rotates; and an cooling fin combined air flow guide formed on a surface of the stator to increase a heat exchange area for a heat exchange between the air generated by the heat-radiation fin portion and the air inside the stator; and at the same time guide the air from the exterior of the stator toward the central shaft so that the air is introduced into the rotator via a lower surface of the rotator. | 04-23-2015 |
20150115752 | OPEN-TYPE INDUCTION MOTOR - There is provided an open-type induction motor, and more particularly, to an open type induction motor in which a rotor has a structure allowing air to flow therein, thus enhancing cooling efficiency of the rotor and a stator. The open-type induction motor includes: a stator including an iron stator core having a radial duct hole and a stator coil wound around the iron stator core; and a rotor disposed in a hollow of the stator so as to be rotatable by magnetism generated by the stator coil, and including a rotational shaft, a plurality of iron rotor cores stacked in an axial direction of the rotational shaft and coupled to the rotational shaft, a rotor coil coupled to the plurality of iron rotor cores, and duct plates stacked between the plurality of iron rotor cores and outwardly discharging air present at the inner side of the iron rotor cores. | 04-30-2015 |
20150130305 | MOTOR CAP ASSEMBLY FOR REDUCING INTERNAL TEMPERATURES - Disclosed is an end cap for a motor housing containing an electric motor, including a tubular structure defining an interior space, including an open first end connectable to the motor casing; a second end, including a first planar surface; a second planar surface offset from the first planar surface and substantially parallel to the first planar surface; and at least one air grate surface substantially perpendicular to the first planar surface and the second planar surface, positioned between and attached to the first planar surface and the second planar surface, and wherein the at least one air grate surface includes at least one air grate configured to permit air flow into and/or out of the interior space. | 05-14-2015 |
20150303765 | ROTATING ELECTRICAL MACHINE - In an alternator for a vehicle according to the present invention, each of rear-side ribs defining each of rear-side exhaust holes includes a projecting portion that has a three-sided sectional shape obtained by cutting along a vertical direction relative to a center axis line of a shaft at least in a portion away from respective end portions of stator coils, and has an apex oriented toward a cooling fan. The apex is oriented in a direction opposite to a rotating direction of the cooling fan. Therefore, the amount of air generated by the cooling fan is increased to improve cooling performance for a stator. | 10-22-2015 |
20150303773 | ELECTRIC MOTOR WITH FAN MOTOR - An electric motor comprising: an motor main body, a fan motor for cooling the motor main body, and a casing which is attached to the motor main body to hold the fan motor, wherein the fan motor has engagement parts, and both of the motor main body and the casing are provided with engagement parts which can engage with the engagement parts on the fan motor to fasten the fan motor. | 10-22-2015 |
20150318749 | ELECTRICALLY ROTATING MACHINE - An electrically rotating machine, includes a rotor and a stator, the rotor and/or the stator including a laminated core, with an air gap being formed between the rotor and the stator, said rotor having axially and radially extending cooling paths in flow communication with each other and in flow communication with radially extending cooling paths of the stator via the air gap, wherein the radially extending cooling paths of the stator are respectively axially aligned with the radially extending cooling paths of the rotor; at least one fan for conducting an air flow through the axially and radially extending cooling paths of the rotor, the air gap and the cooling paths of the stator, wherein the air gap has at least one constriction defined by sheets of the laminated core of the rotor having an outer radius greater than remaining ones of the sheets of the laminated core of the rotor and/or by sheets of the laminated core of the stator having a smaller inner radius than remaining ones of the sheets of the laminated core of the stator. | 11-05-2015 |
20150326083 | COOLING STRUCTURE FOR MOTOR - A cooling structure for a motor includes: a stator in which a plurality of teeth are arranged along an inner circumference of a hollow at which a rotor is disposed, and spacing portions are formed between the teeth; coils individually wound around outer circumferences of the teeth and configured to generate a magnetic force by external power; and cooling tubes individually wound around the teeth to surround outer circumferences of the coils and configured to cool the coils by circulating a refrigerant supplied from the outside. | 11-12-2015 |
20150340922 | ELECTRIC MOTOR HAVING AIR PURGE FUNCTION - An electric motor includes a rotor which is rotatably supported by a first bearing which is provided at a first end part on an output shaft side and a second bearing which is provided at a second end part opposite to the first end part, a stator which is provided with a winding and which surrounds the rotor, a front housing part which supports the first bearing and which forms a winding accommodation space which accommodates the winding, a rear housing part which supports the second bearing, an air feed port to which pressurized air is fed, and an air flow path which linearly extends from said air feed port to a space surrounding the first bearing and communicates with the winding accommodation space. | 11-26-2015 |
20150349608 | Axial Gap Motor - Provided is an axial gap motor provided with a rotor fixed to a rotary shaft, a stator facing the rotor along a shaft direction, a flow passage forming body that forms a flow passage through which a cooling refrigerant is flowed, and a housing that houses the rotor and the stator and that holds the flow passage forming body. The flow passage forming body forms an inflow port provided on a first surface of the housing facing the shaft direction, a flow passage portion passing from the inflow port through a lateral portion of the rotor in a radial direction, and a discharge port connected to the flow passage portion and provided closer to the stator than the rotor in the shaft direction. | 12-03-2015 |
20150381007 | ELECTRIC MOTOR WITH AIR PURGE STRUCTURE - An electric motor comprises a tubular housing for holding a rotor core, a shaft which has a first end part projecting outward from the housing and a second end part located inside the housing, and a bearing located between the first end part and the rotor core for rotatably supporting the shaft inside the housing. The housing is provided with an air feed hole to which an air feed source can be connected for feeding air to an inside space where the second end part is located, and the shaft is provided with a bore which extends from an air inflow port formed on the second end part to an air outflow port formed on a circumferential surface of a partial region of the shaft which is located between the first end part and the bearing. | 12-31-2015 |
20150381015 | ROTOR OF ROTARY ELECTRIC MACHINE - A rotor related to the present invention is for a rotary electric machine. The rotor includes a rotor core and magnets. The rotor core has a plurality of core refrigerant passages. The core refrigerant passage each includes an inlet passage, a magnet cooling passage and an outlet passage. The inlet passage is configured such that a liquid refrigerant flows into the inlet passage from a shaft refrigerant passage. The magnet cooling passage is configured such that the liquid refrigerant flows into the magnet cooling passage from the inlet passage. The magnet cooling passage extends in an axial direction. The outlet passage is configured to flow the liquid refrigerant from the magnet cooling passage to a gap. An axial position of the outlet passage in the rotor core is at one place at a central position in the axial direction. | 12-31-2015 |
20160006307 | ROTATING ELECTRICAL MACHINE - According to an electric motor, a cooling hole is formed outside of a circular arc-like region having an intersection between extension lines from inner side surfaces of adjacent permanent magnets as a center of the circular arc-like region and a distance between the intersection and an intermediate point on the side surface of the permanent magnet as a radius of the circular arc-like region. Thus, heat generation by a magnetic resistance due to the cooling hole is suppressed to improve efficiency. | 01-07-2016 |
20160036276 | ROTOR FOR ROTARY ELECTRIC MACHINE AND ROTARY ELECTRIC MACHINE | 02-04-2016 |
20160056682 | STATOR, ELECTRIC MACHINE AND ASSOCIATED METHOD - According to another embodiment of the present invention, an electric machine is provided. The machine includes a housing and a stator. The stator is fixedly secured to the housing. The machine also includes a rotor. The rotor is rotatably secured to the housing. At least one of the housing, the stator and the rotor include an inner wall defining a passageway adapted for improved fluid flow therethrough. | 02-25-2016 |
20160065035 | ROTARY ELECTRIC MACHINE - A rotary electric machine is installed such that a central axis of a rotating shaft is horizontal, and coolant suction apertures are formed at positions on a cylindrical portion of a frame that are vertically above first and second coil ends, and strip-shaped insulating papers are inserted such that a thickness direction is in a radial direction between radially adjacent conductor portions of portions of the conductor wire that constitute the first and second coil ends, and are disposed so as to extend circumferentially across positions that are vertically below the coolant suction apertures inside the first and second coil ends. | 03-03-2016 |
20160072369 | ROTATING ELECTRICAL MACHINE - A rotating shaft is attached rotatably to a front body and a rear body of an AC generator. Feeding brushes are disposed around a rear end portion of the rotating shaft. A heat radiating plate is attached to a rear end of the rear body. A control board is attached to a back of the heat radiating plate. External air flows in from an air inlet and advances in a radially inward direction after passing through a cooling fin disposed on the heat radiating plate by a first air flow passage. In addition, the external air passes through and around the rear end portion of the rotating shaft after flowing into a rear surface side of the heat radiating plate via a second air passage. | 03-10-2016 |
20160079814 | DYNAMOMETER FOR A TEST STAND FOR AN AIRCRAFT TURBOMACHINE - The invention relates to a rotating electric machine, such as a dynamometer. The rotor of the machine comprises a circular row of resultant magnetic poles of which the polarity forms an alternation of opposed poles. The resultant poles each include a pair of permanent magnets in a “V”, each equipped with a north pole N, a south pole S, and opposed faces, where the magnet poles are located. In each resultant pole the magnets are disposed so as to have faces having identical polarities, which faces are oriented radially outwardly, facing towards one another, thus forming therebetween an angle β between 90° and 110°, which makes it possible to increase the efficiency. The invention also relates to a turbomachine test stand equipped with a dynamometer enabling a recovery of electrical energy. The invention also relates to a hybrid motor vehicle propelled by the rotating electric machine. | 03-17-2016 |
20160079820 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes: a stator that includes a cylindrical inner hole; and a rotor that includes a rotation shaft being concentric with the inner hole of the stator and whose outer peripheral surface faces an inner peripheral surface of the inner hole across a predetermined gap, wherein a rotor core that is provided around the rotation shaft is divided into a plurality of portions in an axis direction thereof, and, inside each of rotor cores that are created by the division, a plurality of ventilation holes are formed around the rotation shaft in such a way as to pass therethrough in an axis direction thereof, and a spacer is provided between end surfaces of the rotor cores, and a duct is formed in such a way as to extend from the ventilation holes to the gap with the inner peripheral surface of the inner hole of the stator. | 03-17-2016 |
20160087509 | ELECTRIC MACHINE END TURN COOLING APPARATUS - A cooling structure for an end turn of an electric machine stator. The cooling structure includes a plurality of layers, a layer of the plurality of layers having an opening forming a portion of a fluid passage. | 03-24-2016 |
20160099625 | Electric Motor With Radially Mounted Magnets - An electric device includes: a first set of magnets arranged in an annular array about a central axis of the device; a second set of magnets arranged in an annular array about the central axis of the device; a first carrier supporting the first set of magnets, the first carrier rotatable about the central axis; a second carrier supporting the second set of magnets axially spaced along the central axis from the first set of magnets, the first and second carriers dimensioned to allow the first and second set of magnets to move past each other when the first carrier rotates. A method of moving magnets with respect to each other may also be provided. | 04-07-2016 |
20160105067 | CENTRALLY LOCATED CONTROL ELECTRONICS FOR ELECTRIC MACHINE - An electronic package adapted for connection to a rear frame member of an electric machine. The electronic package includes a cooling tower having first and second axial ends and a central axis. The cooling tower includes a metallic first wall extending about the central axis and defining radially inner and outer first wall surfaces. An axially extending air flow passage extends through the cooling tower. Spaced metallic ribs traverse the air flow space and are in conductive thermal communication with the radially inner first wall surface. A plurality of circumferentially distributed power electronics devices are in conductive thermal communication with the cooling tower and secured to the radially outer first wall surface to thereby provide a heat sink for the power electronics devices. Electronic control circuitry is operatively connected to and substantially surrounded by the power electronics devices. An electric machine with such an electronic package is also disclosed. | 04-14-2016 |
20160111923 | LAMINATION FOR A STATOR CORE OF AN ELECTRIC MACHINE - A lamination for a stator core of an electric machine includes an outer periphery, and an inner periphery that is characterized by a plurality of teeth. The teeth are radially arranged so as to define slots therebetween. The lamination further defines an opening that is located between the outer periphery and the inner periphery. The lamination further defines a plurality of projections laterally extending into the opening, wherein the projections are configured to increase a surface area of the lamination located adjacent to the opening and increase a heat transfer capacity of the lamination. In another aspect of the present disclosure, such projections may also be located on the outer periphery of the lamination to increase the heat transfer capacity of the lamination. | 04-21-2016 |
20160118862 | COOLING SYSTEM FOR ELECTRIC ROTOR MACHINE - A symmetrical cooling system for an electric rotor machine that includes a passageway that is positioned between portions of the stator, and which provides a pathway for a cooling medium. Stator ducts positioned within the stator, or portions thereof, are in fluid communication with the passageway. Cooling medium may flow through the suitor ducts from the passageway to ends of the stator so that the cooling medium only travels along a portion of the overall axial length of the stator. The symmetrical cooling system also includes an air gap dial is positioned between the stator and the rotor, and which receives cooling medium from the passageway at a midsection of the air gap. Cooling medium received at the midsection of the air gap may then flow towards either first or second ends of the stator. | 04-28-2016 |
20160126800 | ELECTRIC DRIVE UNIT - An electric drive unit includes an electric motor having a motor housing which has at least one coolant channel for cooling the electric motor. A power electronic device operates the electric motor and includes an electronic housing having a contact surface which is connected to a mating contact surface of the motor housing. The power electronic device is hereby configured in the absence of a coolant channel and connected to the motor housing in a heat-transferring manner. | 05-05-2016 |
20160149448 | INTEGRAL OPTIMIZED FLOW CHANNELS FOR FLUID-COOLED MOTORS AND GENERATORS - An electric machine is provided. The electric machine may comprise an inlet and a stator fluidly coupled to the inlet. The stator may comprise a first cooling channel formed in the stator with a first cross-sectional area. A second cooling channel may be formed in the stator and have a second cross-sectional area. The first cross-sectional area may be less than the second cross-sectional area. The electric machine may also include an outlet fluidly coupled to the stator. A stator assembly is also provided. The stator assembly may include a first channel with a first cross-sectional area and a second channel with a second cross-sectional area. The second cross-sectional area may be less than the first cross-sectional area. | 05-26-2016 |
20160149452 | THERMO PUMP-COOLED GENERATOR END WINDINGS WITH INTERNAL COOLING PASSAGES - Rotor windings for a thermo pump-cooled generator have an internally formed cooling passage having a cooling inlet on a radial underside of the motor end winding portion and a cooling outlet on a radial upper side of the axial portion that is oriented within the generator air gap. The cooling passage in the rotor winding exhausts air from end winding portions that are circumscribed by a generator retaining ring into the generator air gap. | 05-26-2016 |
20160156250 | ELECTRIC MACHINE | 06-02-2016 |
20160164357 | ROTOR STRUCTURE OF WOUND ROTOR DRIVING MOTOR - A rotor of a wound rotor driving motor is provided. The rotor includes a rotor body that is rotatably installed with a predetermined air gap within a stator and in which a rotor coil is wound in a plurality of rotor teeth. A bobbin is fixed to the rotor body by the rotor coil disposed at opposing sides of an axial direction of the rotor body and supports the rotor coil. The rotor body forms a plurality of air movement passages that are opened to the exterior in an axial direction therein, and the bobbin forms a plurality of connection passage that are coupled to the air movement passages. | 06-09-2016 |
20160164374 | ROTOR OF WOUND ROTOR DRIVING MOTOR - A rotor of a wound rotor driving motor includes: a rotor body that is rotatably installed at a predetermined air gap at an inside of a stator and in which a rotor coil is wound in a plurality of rotor teeth; and an end coil cover that is mounted at each of both sides of an axial direction of the rotor body in order to prevent the rotor coil from separating, where the rotor body forms a plurality of air movement passages that are open to the outside in an axial direction, and the end coil cover forms a plurality of connection passages that are connected to the air movement passage. | 06-09-2016 |
20160164376 | COOLING SYSTEM OF ELECTRIC MOTOR WITH FAN - A cooling system of an electric motor with a fan, including a fan configured to generate fluid flow for cooling the electric motor, and a duct forming a flow channel for guiding a fluid flow generated by the fan, includes at least one hole provided in the duct. | 06-09-2016 |
20160172948 | SINGLE PHASE BRUSHLESS MOTOR | 06-16-2016 |
20160190878 | ELECTRICAL MACHINE AND METHOD OF MANUFACTURE - An electrical rotor machine and a method of manufacturing the same are disclosed. According to at least one aspect of the present disclosure, the method includes forming a stator core from two or more subcores and inserting the separate subcores into a housing before windings are wound through and around the subcores to form a stator. In such embodiments, the housing includes a locating feature structured to position and support the subcores such that a flow channel is formed between the subcores. The locating feature enables both radial and axial cooling of the stator core while reducing pressure losses within the cooling flow path. | 06-30-2016 |
20160204663 | ROTOR ASSEMBLY FOR AN ELECTRIC MACHINE | 07-14-2016 |
20160254728 | ROTATION APPARATUS | 09-01-2016 |
20160254729 | FAN DIRECTING ELEMENT FOR AN ELECTRIC MACHINE | 09-01-2016 |
20170237327 | OUTER ROTOR-TYPE AXIAL GAP BRUSHLESS MOTOR | 08-17-2017 |