Entries |
Document | Title | Date |
20080278018 | BLDC MOTOR ASSEMBLY - A BLDC electric motor assembly ( | 11-13-2008 |
20090001837 | Hollow Motor Drive Device - A hollow motor drive device includes a screw shaft provided with a spiral screw groove formed in an outer peripheral surface thereof, a nut member screw-engaged with the screw groove, a hollow drive shaft having an inner peripheral side on which the nut member is fixed and an outer peripheral side on which a permanent magnet is disposed, and a housing provided with a bearing portion rotatably supporting the hollow drive shaft and a coil portion. In the hollow drive shaft, the nut member and the permanent magnet are disposed so as not to be overlapped with each other in a direction perpendicular to the axial direction of the hollow drive shaft, and in the housing, the bearing portion is disposed to a position corresponding to the nut member, and the coil portion is disposed to a position corresponding to the permanent magnet. | 01-01-2009 |
20090021094 | MOTOR, AND ROTOR, AND MANUFACTURING METHOD FOR THE ROTOR, AND A MOTOR PROVIDED WITH THE ROTOR - A motor may include a stator provided with a plurality of salient poles and coils and a rotor provided with a permanent magnet. The stator is a stator in a concentrated winding system and the permanent magnet is structured of two magnetic poles which are provided with one “S”-pole and one “N”-pole. Each of the two magnetic poles is formed in an angular range of from 135° to 180° and the two magnetic poles are formed in the same angular range. Further, a rotor may include a protective layer having a fiber sheet hardened with resin for covering an outer peripheral side of a permanent magnet. The fiber sheet may include a first fiber sheet whose width dimension is narrower and a second fiber sheet whose width dimension equal to or more than that of the permanent magnet and the first fiber sheet and the second fiber sheet are wound around the outer peripheral side of the permanent magnet. | 01-22-2009 |
20090072646 | Spindle Motor - A spindle motor is provided. The spindle motor includes a base, a bearing housing, a bearing, a rotation shaft, a stator, a bushing, and a rotor. The bearing housing is installed on the base. The bearing is fixed inside the bearing housing. The rotation shaft is installed to be supported by and rotate on the bearing. The stator is disposed around the bearing housing. The bushing is coupled to the rotation shaft. The rotor is coupled to the bushing to rotate through interaction with the stator. | 03-19-2009 |
20090096309 | CORE PLATE STACK ASSEMBLY FOR PERMANENT MAGNET ROTOR OF ROTATING MACHINES - A rotating machine has a stator and a permanent magnet rotor that is more easily made, lower cost, and lighter by virtue of a plurality of permanent magnet assemblies mounted on a rotor body. Each magnet assembly includes two facing core plate stacks supporting a permanent magnet between them. Each core plate stack is made from a plurality of core plates of substantially identical size and shape and with on or more holes in substantially the same location to form respective bores in the stack. A tie rod is formed in each bore and retains the plates in a stack via bevels in the holes of the end plates. Preferably, the tie rods also apply compressive force as a result of placing the stacked plates in an injection mold, injecting plastic into the mold to fill each bore with plastic, and allowing the plastic to cure. As the plastic cures, it shrinks so that the tie rods pull the end plates together. To enhance the pressure, the stacked plates can be compressed before and during the injection process. | 04-16-2009 |
20090115278 | DOUBLE ROTOR TYPE MOTOR - The present invention relates to motors, and more particularly, to a double rotor type motor applicable to a washing machine or the like. The double rotor type motor includes an outer rotor having first base, and a first extension extended from a circumference of the first base substantially perpendicular thereto, the first extension having outer magnets mounted on an inside circumferential surface, an inner rotor having a second base mounted on an upper surface of the first base concentric to the first base, and a second extension extended from a circumference of the second base so as to be opposite to the first extension with a predetermined gap toward an inner side of the first extension, the second extension having inner magnets mounted on an outside circumferential surface, and a bushing at a center of the first base and the second base, for transmission of rotation force both from the outer rotor and the inner rotor to a rotating shaft. | 05-07-2009 |
20090160281 | PERMANENT MAGNET MOTOR WITH RADIALLY SUPPORTED SLEEVE - A rotor assembly includes several permanent magnets separated by spacers. The permanent magnets and the spacers are all fabricated from material having the same coefficient of thermal expansion. The spacers are in a non-magnetized state and provide support for a sleeve placed in a high interference fit with the permanent magnets. The sleeve is thereby fully supported about the inner circumference such that uneven bending stresses are significantly reduced to provide a desired operational life. | 06-25-2009 |
20090195100 | ELECTRIC MOTOR - The present invention relate to an electric motor. The electric motor includes a stator, in which field magnets are fixedly and radially installed on a circular panel-shaped base. A coaxial cylindrical rotor is coupled to a shaft and is configured to allow the stator to be located at an inside thereof, the rotor being configured such that magnets, having different polarities to form each pair, are attached on an outer cylinder and an inner cylinder of the rotor and are arranged opposite each other. A cover is coupled to the circular panel-shaped base to cover the rotor. A rotary magnet plate is coupled to the shaft on a top of the cover, and is provided with a number of magnets corresponding to a number of pairs of the rotor magnets. Magnetic sensors are formed on the top of the cover and configured to come into contact with the rotary magnet plate. A current control device controls a magnetization direction of the field magnets of the stator using a rotation angle signal detected by the magnetic sensors. The rotor magnets, attached on the outer cylinder and the inner cylinder of the rotor, have different polarities to form each pair and are arranged opposite each other, and respective pairs of rotor magnets are arranged on the outer and inner cylinders while being spaced apart from each other by a predetermined interval. | 08-06-2009 |
20090206692 | Composite electromechanical machines with uniform magnets - Embodiments of the present invention include a composite electromechanical machine which can operate as a motor or a generator (including dynamo or alternator). In an aspect, the present composite electromechanical machine comprises at least a double-sided magnetic plane (e.g., rotor or stator) wherein the double-sided magnetic plane comprises a plurality of magnet protruding from both sides and exerting substatially equal magnetic field to both sides of the double-sided magnetic plane. The magnets can be permanent magnets or electromagnets having windings. Other embodiments can also be included. | 08-20-2009 |
20090218900 | Permanent Magnet Alternator with Segmented Construction - A permanent magnet apparatus ( | 09-03-2009 |
20090230800 | Rotor For An Electrical Machine And Electrical Machine For A Drivetrain In A Motor Vehicle - A rotor and an electrical machine for a motor vehicle drivetrain. The rotor includes a rotor carrier with a radial supporting area, an axial supporting area, which extends axially with respect to the axis of rotation of the rotor and which is connected to the radial supporting area and has an inner or an outer first circumferential surface, and a rotor component which conducts magnetic flux and is arranged at the circumferential surface of the axial supporting area. To achieve a rotationally locking connection between the rotor carrier and the rotor component conducting magnetic flux, it is proposed to form the axial supporting area with a positive engagement profile which extends in axial direction of the rotor for receiving, in a positive engagement, the rotor component conducting magnetic flux. | 09-17-2009 |
20090251022 | ROTOR FOR AN ELECTRIC DRIVE MOTOR OF A REFRIGERANT COMPRESSOR - The invention concerns a rotor ( | 10-08-2009 |
20090261676 | Method for Mounting a Magnetic Pole and Associated Rotor - The present invention provides a method for mounting at least one magnetic pole of a rotor of a motor of a synchronous electrical rotating machine from elementary elements, the rotor including a hub. The method includes the following successive steps: forming a set by fixing at least two elementary elements to each other with an electrical insulator being interposed therebetween; the elementary elements being magnetizable; machining a main face of the set of elementary elements in order to form a cylindrical face having a radius substantially equal to the predefined radius of the hub; magnetizing the magnetizable set; and fixing the magnetized set to the hub, the magnetized set forming at least a portion of the magnetic pole. | 10-22-2009 |
20090261677 | MOTOR ROTOR, ELECTRIC POWER STEERING APPARATUS AND PRODUCTION METHOD THEREOF - A motor rotor has: a rotor yoke; a plurality of magnet fixing sections formed on the lateral surface of the rotor yoke; segment magnets respectively fixed to the magnet fixing sections and extending in the axial direction of the rotor yoke; and a plurality of projections which are provided, on the rotor yoke, at each boundary section located between each of the adjacent magnet mounting sections, and which protrude outward from the rotor yoke; and a pair of end claws are formed by bifurcating the end of each projection into two prongs, and each of the end claws is locked to the outer surface of each of the segment magnets. | 10-22-2009 |
20090284092 | Motor Rotor - A motor rotor includes a hub, a metal ring and a magnet ring. The hub includes a peripheral wall. The metal ring includes an engaging portion and is formed by bending a strip of metal plate to form a cylindrical ring mounted to an inner surface of the peripheral wall of the hub. The metal plate includes a first positioning portion and a second positioning portion respectively on two ends thereof. The first and second positioning portions are joined together to form the engaging portion. The magnet ring is mounted to an inner radial surface of the metal ring. Accordingly, by configuration of the engaging portion, stable formation of the cylindrical metal ring is assuredly provided. | 11-19-2009 |
20090302702 | MAGNET HOLDER FOR PERMANENT MAGNET ROTORS OF ROTATING MACHINES - A rotating machine with a permanent magnet rotor that is easier, lower cost, and lighter includes a plurality of permanent magnet assemblies ( | 12-10-2009 |
20090302703 | ELECTROMAGNETIC MOTOR EMPLOYING MULTIPLE ROTORS - An electromagnetic motor employing plural rotors is provided, with each rotor exhibiting a permanent magnetic field. A control module selectively induces magnetic fields in electromagnetic pads surrounding each of the rotors. Through the interaction of the permanent and induced magnetic fields, the rotors can turn. As a result, a shaft mechanically engaging the rotors also turns to provide mechanical power. In response to the shaft rotation, an alternator generates sufficient electrical power to sustain the operation of the control module without an external power source. The magnetic polarities of the induced magnetic fields can be reversed, thus causing the rotors to continue turning. In various applications, the motor can be installed in a vehicle or in a building power supply as desired. | 12-10-2009 |
20090309447 | POLYPHASE MACHINE COMPRISING A BELL-SHAPED ROTOR - The invention relates to an electrical polyphase machine comprising an inner stator ( | 12-17-2009 |
20090315422 | Rotor of Permanent Magnet Motor - A rotor of permanent magnet motor is disclosed. The rotor includes a fixing seat having a central hole, a shaft penetrating the central hole for driving an external device by magnetic induction, a plurality of magnets annularly disposed on a cylindrical peripheral of the fixing seat, and a plurality of magnet spacers, each of which is disposed between two adjacent magnets. By changing magnetic circuit resulting from the magnet spacers, the magnetic resistance can be reduced because the rotary magnetic field between the magnets and the stator varies. Thus performance of the motor using the rotor of the invention can be improved. | 12-24-2009 |
20090315423 | MOTOR - A motor including: a rotatably supported shaft; and a rotor section press-fitted and fixed coaxially to the shaft, wherein the rotor section is provided with: a rotor yoke; a housing hole formed on an end surface of the rotor yoke along the axial direction of the shaft; a permanent magnet housed within the housing hole; and a pair of end surface plates: that have a ring-shaped plate that is provided so as to cover at least an opening section of the housing hole and that is made of a non-magnetic material, and a supporting plate that supports the ring-shaped plate, that is press-fitted and fixed on the shaft, and that has a coefficient of linear expansion equivalent to that of the shaft; that are provided on axial end portions of the rotor yoke; and that clamp the rotor yoke so as to hold the permanent magnet within the housing hole. | 12-24-2009 |
20100019598 | ROTOR FOR AN ELECTRIC MACHINE - A multi-pole rotor for an electric machine including a rotor hub, a plurality of primary permanent magnet segments, each primary magnet segment having a rounded outer face and forming a section of a cylindrical outer surface of the rotor when mounted to the rotor hub. A plurality of interpole permanent magnet segments are also included, each interpole magnet segment having a rounded outer face and forming a section of a cylindrical outer surface of the rotor when mounted to the rotor hub. The primary magnet segments and interpole magnet segments defining two or more poles. | 01-28-2010 |
20100019599 | ROTOR FOR AN ELECTRIC MACHINE - A rotor for an electric machine can be constructed with magnet segments having a uniformly oriented direction vector component. In certain instances, a two-pole rotor includes a rotor hub and a plurality of permanent magnet segments affixed to a perimeter of the rotor hub. The magnetic segments defining a substantially cylindrical outer surface of the rotor. The magnet segments each have a magnetic field with a direction vector component, and the direction vector components of the magnet segments affixed to the perimeter of the rotor hub are substantially parallel and oriented in substantially the same direction. | 01-28-2010 |
20100026124 | Rotor for brushless motor - A rotor for brushless motor is disclosed to use locating blocks for securing magnetic plates to peripheral flanges of silicon steel plates being arranged in a stack and sleeved onto a shaft and weight(s) for insertion into peripheral notches of the silicon steel plates to adjust the center of gravity and to keep the rotor in balance. | 02-04-2010 |
20100033050 | MOTOR AND ELECTRONIC APPARATUS HAVING THE SAME - The motor of the invention is an outer rotor type motor, and a rotor includes a cylindrical rotor frame that is opened at one end thereof in an axial direction, and a hollow cylindrical magnet attached to an inner periphery of the rotor frame. The magnet has a joining portion joined to an inside cylindrical portion of the rotor frame, and a protruding portion that further protrudes in the axial direction from one end, the outer diameter of the protruding portion is larger than the inner diameter of the rotor frame, and the joining portion is directly brought into close contact with a portion ranging from the one end to at least a portion of the inside cylindrical portion. | 02-11-2010 |
20100052456 | Automotive alternator having improved magnet holder - An automotive alternator includes a magnet holder that is composed of first and second magnet holder pieces. Each of the first and second magnet holder pieces is made of a nonmagnetic metal plate to have a one-piece structure. Each of the first and second magnet holder pieces includes a plurality of receiving portions, each of which receives a permanent magnet, and a plurality of connecting portions. All the receiving portions of the first magnet holder piece have the same orientation. Each of the connecting portions of the first magnet holder piece connects a circumferentially-adjacent pair of the receiving portions of the first magnet holder piece. All the receiving portions of the second magnet holder piece have the same orientation. Each of the connecting portions of the second magnet holder piece connects a circumferentially-adjacent pair of the receiving portions of the second magnet holder piece. | 03-04-2010 |
20100072850 | AXIAL GAP TYPE ROTATING MACHINE - An axial gap type rotating machine rigidly fixing the permanent magnets without reducing the magnetic flux and having a high output is provided. | 03-25-2010 |
20100109465 | MOTOR STRUCTURE AND FAN - A motor structure and a fan are provided. The motor structure includes a shaft, a motor control panel, a stator, a rotor and a motor housing. The motor control panel has a first fastening portion and is engageable with the shaft. The stator has a second fastening portion coupled to the first fastening portion so as to fasten the motor control panel to the stator, thereby reducing the overall size and saving costs of materials. The rotor corresponds in position to the stator and is pivotally connected to the shaft. The motor housing is pivotally connected to the shaft and encloses the shaft, the motor control panel, the stator, and the rotor. The fan includes the motor structure and a fan blade element. | 05-06-2010 |
20100109466 | Rotor for electric rotary machine - A rotor for an electric rotary machine and a method of manufacturing the same are disclosed wherein none of permanent magnets is fixed to a magnetic supporting segment of a magnet support ring in advance and each permanent magnet is assembled separately of the magnet support ring. Prior to the assembling of the permanent magnets, the magnet support ring is preliminarily located on claw-shaped magnetic poles at inner peripheral sides thereof under a state combined with a pair of field iron cores, after which the permanent magnets are inserted to magnet insertion spaces in longitudinal directions. The rotor includes positioning and restricting means for precluding the occurrence of positional displacement of each permanent magnet with respect to each magnet supporting segment of the magnet support ring. | 05-06-2010 |
20100187932 | DISC DRIVING DEVICE AND METHOD FOR MANUFACTURING THE SAME - A disc driving device includes a rotor assembly including a cylindrical rotor frame, a magnet arranged inside the rotor frame concentrically therewith so as to form a cylindrical space, a shaft fixed at one end thereof with the center hole of the shaft holder formed at the rotation center of the rotor frame, and a bearing for supporting the rotor assembly. The center hole of the shaft holder includes a small-diameter portion at the bottom thereof in the axial direction of the shaft, and an inclined portion which is formed above the small-diameter portion in such a manner as to be tapered and expanded upward in the axial direction. The shaft holder and the shaft have a void therebetween, which is filled with ultraviolet curing adhesive so as to form an adhesive fastening portion. | 07-29-2010 |
20100207476 | DYNAMOELECTRIC MACHINE - A dynamoelectric machine includes first and second magnet seat portions disposed to project from portions of first and second yoke portions that face respective inner circumferential surfaces near tip ends of second and first claw-shaped magnetic pole portions, and magnet housing portions disposed integrally to extend axially outward from outer circumferential portions of a pair of flange portions of a bobbin, extend near the first and second yoke portions that face the inner circumferential surfaces near the tip ends of the first and second claw-shaped magnetic pole portions, and be held by the first and second magnet seat portions. First and second permanent magnets are housed and held in the first and second magnet housing portions, are disposed to face the inner circumferential surfaces near the tip ends of the second and first claw-shaped magnetic pole portions, and the first and second permanent magnets are respectively magnetically oriented in a reverse direction to a direction of a magnetic field that the field coil produces. | 08-19-2010 |
20100219710 | AXIAL GAP MOTOR - The axial gap motor includes the rotor having: a rotor frame including a plurality of ribs extending in a radial direction, an inner circumferential side annular shaft, and an outer circumferential side annular rim, which are integrally coupled to each other through the ribs; the shaft has shaft side rib mounting holes through which the ribs are mounted, the rim has rim side rib mounting holes through which the ribs are mounted, the ribs have radial inner ends mounted and fixed into the shaft side rib mounting holes and radial outer ends mounted and fixed into the rim side rib mounting holes, and in the rotor frame, the main magnets and the sub magnets are alternately disposed in the circumferential direction, between the shaft and the rim. | 09-02-2010 |
20100277024 | LOW-INERTIA PERMANENT-MAGNET ELECTRICAL MACHINE ROTOR | 11-04-2010 |
20100277025 | ROTARY TABLE FOR PERMANENT MAGNET ROTATING MACHINE AND METHOD FOR MANUFACTURING PERMANENT MAGNET ROTATING MACHINE - A method for assembling rotors which is applicable to a large axial gap type permanent magnet rotating machine is provided. | 11-04-2010 |
20100283346 | AXIAL RETENTION OF PERMANENT MAGNET ROTOR IN HIGH SPEED GENERATOR - A permanent magnet rotor for use on an electrical generator comprises a hub having an outer peripheral surface and an inner peripheral bore centered on an axis. The inner peripheral bore is provided with a screw thread at least over a portion of an axial dimension. Permanent magnets are mounted on the outer peripheral surface of the hub. A containment band is positioned radially outwardly of the magnets, holding the magnets and the hub together. The hub, a generator rotor incorporating the permanent magnet rotor, and a generator incorporating the permanent magnet rotor are also disclosed and claimed in this application. | 11-11-2010 |
20110006630 | MOTOR - A motor is disclosed. In accordance with an embodiment of the present invention, the motor includes a stator and a rotor, which is supported by the stator such that the rotor rotates. Here, the rotor includes a rotational axis, which is supported by the stator such that the rotational axis rotates, a rotating body, which rotates together with the rotational axis, and a hub, which has a ring-shaped body and a protruding part. Here, the ring-shaped body is interposed between the rotational axis and the rotating body, and the protruding part extends an outer circumferential surface of the ring-shaped body coupled to the rotating body. Thus, the motor can improve the coupling strength between the rotational axis and the rotating body, securing the rotating rotor's stability. | 01-13-2011 |
20110006631 | ROTOR FOR AN ELECTRICAL MACHINE | 01-13-2011 |
20110043065 | 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. In this manner, permanent magnets may be installed on the magnet carrying structure by an interference fit, without using bolts or adhesives, to facilitate both assembly and removal for maintenance and repair. | 02-24-2011 |
20110043066 | BILAYER MAGNETIC ELECTRIC MOTOR - A bilayer magnetic electric motor comprises a rotor and a stator. The rotor has a casing and an iron ring provided in the casing. The internal and external surfaces of the iron ring are respectively disposed with a plurality of circularly arranged first and second magnets. The stator is located in and axially connected to the casing and includes a plurality of internal stator coil sets and a plurality of external stator coil sets that are respectively arranged in a circular array. Accordingly, when the stator is combined with the rotor, the iron ring and the first and second magnets are located in a circular space between the internal and external stator coil sets, and the first and second magnets respectively correspond to the internal and external stator coil sets. Consequently, the output power is increased when the rotor rotates and the size of the electric motor is also decreased. | 02-24-2011 |
20110050021 | Motor and recording disc driving device - A motor includes a shaft supporting a rotation of a rotor, a sleeve supporting the shaft such that an upper end of the shaft protrudes upward in an axial direction, a rotor case having a rotor hub, which is forcibly inserted and fixed to a protrusion of the shaft, and rotated by a rotation of the shaft, and an adhesive sealing space formed on an insertion surface between the protrusion and the rotor hub. | 03-03-2011 |
20110089781 | ROTOR FOR MOTOR AND MOTOR - A rotor for motor may include a rotation shaft, a permanent magnet structured in a tube-like shape and fixed to an outer peripheral side of the rotation shaft, and a sleeve which is structured in a tube-like shape, disposed between an outer peripheral face of the rotation shaft and an inner peripheral face of the permanent magnet, and press-fitted and fixed to the outer peripheral face of the rotation shaft. The sleeve is retreated from an end part of the permanent magnet on one side in an axial direction to the other side in the axial direction so that a first ring-shaped recessed part is formed between the rotation shaft and the permanent magnet and the rotation shaft and the permanent magnet are fixed to each other with a first adhesive in the first ring-shaped recessed part. The rotor may be applied to a motor, preferably to a stepping motor. | 04-21-2011 |
20110127870 | ROTOR FOR PERMANENT-MAGNET MOTOR, PERMANENT-MAGNET MOTOR, AND METHODS OF MANUFACTURING THE SAME - A rotor for a permanent-magnet motor includes a rotor-core surface, a plurality of ridges provided on the rotor-core surface and extending in an axial direction of the rotor, a plurality of areas defined by the ridges, and a plurality of permanent magnets provided on the rotor-core surface within the areas and arranged along sidewalls of the ridges, the sidewalls being on one side in a peripheral direction of the rotor. | 06-02-2011 |
20110140561 | MAGNET RETAINING ARRANGEMENT - A permanent magnet rotor arrangement that is particularly suitable for low-speed large-diameter electrical generators includes a rotor | 06-16-2011 |
20110181142 | DYNAMOELECTRIC MACHINE AND METHOD FOR MANUFACTURING A ROTOR THEREFOR - The present invention provides a dynamoelectric machine and a method for manufacturing a rotor therefor that can hold permanent magnets stably for a long time by a simple magnet holding construction. | 07-28-2011 |
20110204739 | Assembly and method for mounting magnets on a steel sheet rotor pack - An assembly for mounting magnets on a steel sheet rotor pack, the assembly including a plurality of baseplates made of a magnetic material and fixed to the rotor pack, and a plurality of magnets being in turn fitted to each baseplate. In one embodiment, the baseplates are fixed to the rotor pack by means of inner locking bars housed in axial ducts provided inside said rotor pack. The baseplates are fitted to the inner locking bars by fixing means passing through longitudinal channels connecting the axial ducts and the outer surface of the rotor pack. | 08-25-2011 |
20110221295 | PERMANENT MAGNET ROTOR AND MOTOR USING THE SAME - A motor, including at least a stator, including at least a stator core and a coil winding, and a rotor, including at least a rotor core and multiple permanent magnets. Multiple wire receiving grooves are disposed on the stator core. The permanent magnets are disposed on the rotor core. The ratio between the number of teeth of the wire receiving grooves and that of the permanent magnets is 3:2. Every two or three of the permanent magnets form a group of permanent magnets. A gap is disposed between adjacent groups of permanent magnets. The groups of permanent magnets are circumferentially distributed. Magnetic polarities of the permanent magnet are alternatively distributed in a N phase and a S phase. Difference in an electric angle between centers of polarities of adjacent permanent magnets in one group is between 150 degrees and 170 degrees. | 09-15-2011 |
20110260566 | ROTATING ELECTRICAL MACHINE - A rotor disc is disclosed for an axial flux permanent magnet rotating electrical machine. The rotor disc ( | 10-27-2011 |
20110266909 | Segmented Rotor - The present application provides a segmented rotor. The segmented rotor may include a center wheel, a number of rotor support segments positioned about the center wheel, and a number of active rotor components positioned about each of the rotor support segments. | 11-03-2011 |
20110291514 | RESILIENT ROTOR ASSEMBLY FOR INTERIOR PERMANENT MAGNET MOTOR - A method for manufacturing an interior magnet rotor core motor is described herein. The method includes attaching a resilient material to an inner rigid structure configured to engage a shaft associated with the motor, engaging the structure with the motor shaft, positioning the shaft and structure assembly with respect to the rotor core, and affixing the resilient material to the rotor core. | 12-01-2011 |
20120001508 | PERMANENT MAGNET ELECTRIC MACHINE AND PERMANENT MAGNET FOR AN ELECTRIC MACHINE - The disclosure relates to an electric machine with a permanent magnet rotor, where permanent magnets have been fitted on an outer surface of a cylindrical rotor, and relates to a permanent magnet. The permanent magnets forming the electric machine's rotor pole are shaped so that the electric machine's air gap is substantially constant in a middle of the pole, and the air gap increases in an essentially straightforward manner when moving towards the edge of the pole. The permanent magnet is of an even thickness in the middle, and becomes thinner towards the edges. This can result in a decrease in the torque ripple and cogging torque of an electric machine. | 01-05-2012 |
20120019088 | Permanent magnet rotor arrangement and method for producing such an arrangement - A permanent magnet rotor arrangement is provided. The arrangement includes a rotor, a plurality of nonmagnetic profiled tubes defining a closed channel and affixed circumferentially along the outer rim of the rotor, and a plurality of permanent magnet pole pieces arranged in the channels. In a preferred embodiment, the tubes are monolithic and one pole piece is arranged in every channel. | 01-26-2012 |
20120032546 | WIND TURBINE GENERATOR AND MAINTAINANCE METHOD THEREOF - A wind turbine generator includes: a main shaft; a generator having a rotor and a stator; and a sleeve coupled to the rotor and inserted onto the main shaft. The stator includes: stator magnetic poles arrayed circumferentially of the main shaft; and first and second stator plates rotatably coupled to the main shaft to support the stator magnetic poles. The rotor includes: rotor magnetic poles and at least one magnetic pole supporting structure coupled to the main shaft to support the rotor magnetic poles and provided between the first and second stator plates such that the rotor and stator magnetic poles are detachable from the sleeve. Positions at which the rotor and stator magnetic poles are detachable from the sleeve are closer to the main shaft from a closer end of the main shaft to the generator. | 02-09-2012 |
20120032547 | MAGNET RING OF A MULTI-POLE GENERATOR FOR A WIND TURBINE - In the case of a magnet system ( | 02-09-2012 |
20120038235 | SPINDLE MOTOR - Disclosed herein is a spindle motor including: a rotating part including a hub coupled to a rotating shaft and a magnet coupled to the hub; and a fixing part including a sleeve supporting the rotating shaft and an armature facing the magnet, wherein the magnet has a contact part formed on an upper end portion thereof in a direction of the rotating shaft, the contact part partially contacting a lower end portion of the hub. | 02-16-2012 |
20120043843 | MOTOR ROTOR AND MOTOR HAVING THE MOTOR ROTOR - A motor rotor includes an annular body and a positioning protrusion installed on an inner lateral surface of the annular body. A magnetic body may be positioned by propping its lateral surface against the positioning protrusion, without the use of additional jigs. Therefore, the time needed to assemble the magnetic body to the annular body is saved, and the manufacturing cost of the whole motor is reduced. | 02-23-2012 |
20120043844 | Direct Drive Rotor with Metal Coupler - An overmolded-type rotor for an outer rotor-type electric motor, wherein, in addition to a backing ring and magnets, a metallic coupler that comprises an inner axial surface configured to interface with a shaft to be driven by the rotor and an outer axial surface that corresponds to a multiplicity of outer teeth is overmolded with a polymer frame. | 02-23-2012 |
20120126652 | Rotor Structure For A Fault-Tolerant Permanent Magnet Electromotive Machine - A rotor structure for a permanent magnet electromotive machine is provided. A back-core lamination is disposed around a plurality of permanent magnets. The back-core lamination comprises a plurality of high-reluctance regions arranged to attenuate asynchronous magnetic flux components while avoiding synchronous magnetic flux components. The asynchronous and synchronous magnetic flux components result from spatial harmonic components of a plurality of fractional-slot concentrated windings of a stator of the machine. | 05-24-2012 |
20120133230 | SPLIT-POLE MAGNETIC MODULE FOR ELECTRIC MACHINE ROTORS - A split-pole magnetic module for use in large permanent magnet machines. The split-pole magnetic module has at least two permanent magnets positioned within a lamination stack at an angle relative to each other so that magnetic flux enters a first portion of an outer surface of the lamination stack and exits a second portion of the outer surface of the lamination stack. Consequently, little if any magnetic flux passes through, or is carried by, the support structure of a rotor or a stator. | 05-31-2012 |
20120248916 | MAGENT RETAINING ARRANGEMENTS - The present invention provides a permanent magnet rotor arrangement for a rotating electrical machine including a rotor body having an outer rim. A circumferential array of magnet carriers is mounted to the rotor body by fixing members and support members and is spaced apart from the rotor body in the radial direction to define a series of axially gaps or spaces which can optionally be used as passages for cooling air. At least one pole piece made of permanent magnet material is located adjacent to a surface of each magnet carrier. The magnet carriers and pole pieces preferably have a laminated or divided construction to virtually eliminate eddy currents that may be particularly problematic in certain types and construction of electrical machine. The flux path between adjacent pole pieces flows in the circumferential direction within the magnet carriers and does not use the rotor body. | 10-04-2012 |
20120299429 | ROTOR AND MOTOR - A rotor and a motor are provided in which the q-axis inductance is increased and the leakage of magnetic flux is prevented to ensure high power operation at high level driving speeds. The rotor includes a rotor core, which is formed at the center thereof with a hole coupled to a shaft, and a module configured to be coupled to the rotor core and comprises a pair of first permanent magnets, which are space apart from each other, and a first connection part connecting ends of the first permanent magnets to each other. | 11-29-2012 |
20120319518 | HIGH EFFICIENCY HIGH OUTPUT DENSITY ELECTRIC MOTOR - An electric motor that generates mechanical energy whilst increasing both the motor efficiency and the mechanical power density. The electric motor includes: a plurality of disk surfaces having a main longitudinal axis; a plurality of stationary support structures; and a rotating shaft affixed to the disk surfaces. Each disk surface is coupled to an array of offset magnets. The magnets are arranged as matching magnetic pairs on two adjacent disk surfaces to create a plurality of magnetic fields between the matching magnetic pairs. The magnetic fields are titled at an angle A with respect to the main longitudinal axis. Each stationary support structure has an electromagnetic coil array located in-between each of the matching magnetic pairs, which provides an axial magnetic field when voltage is applied on the electromagnetic coil. Each of the electromagnetic coil array is titled at said angle A with respect to the main longitudinal axis. | 12-20-2012 |
20130002079 | Motor - There is provided a motor including: a sleeve supporting a shaft; a hub operating together with the shaft and including a magnet; a base coupled to the sleeve and including a core having a coil wound therearound, the coil generating rotational driving force; and a magnetic flux increase space part formed to be enclosed between the magnet and the hub in order to increase magnetic flux density between the magnet and the core. | 01-03-2013 |
20130009506 | ROTATING ELECTRIC MACHINE - A rotating electric machine includes a stator and a rotor. The rotor includes an iron core and permanent magnets. The iron core includes a cylindrical connection portion and ten magnetic pole portions. The cylindrical connection portion surrounds a rotation shaft. The ten magnetic pole portions, the number of which corresponding to the number of poles, are disposed radially outside the connection portion. The connection portion and the magnetic pole portions are integrated with each other. The permanent magnets are disposed between the magnetic pole portions. The magnetic pole portions include flange portions that cover parts of radially outer surfaces of the permanent magnets while allowing at least parts of the radially outer surfaces to be exposed. Each of the permanent magnets includes a tapered portion in at least a part thereof, and the tapered portion has a length in a direction perpendicular to the radial direction that decreases radially inward. | 01-10-2013 |
20130033142 | Field structure of an electrical machine - A field structure of an electrical machine includes a plurality of field slots. Each field slot extends from a first surface of the field structure into the body of the field structure. Each filed slot also has a T-shaped cross-sectional area dimensioned to accommodate a magnet pole assembly comprising a corresponding cross-sectional area. | 02-07-2013 |
20130043755 | ROTOR FOR USE IN IPM ROTATING ELECTRIC MACHINE, AND IPM ROTATING ELECTRIC MACHINE PROVIDED WITH THE ROTOR - A rotor includes a rotor core; and first and second permanent magnets arranged in the core such that each of the first magnets corresponds to one of the second magnets and, on a cross-sectional plane of the rotor core perpendicular to a rotation axis thereof, a first line passing through the first magnet and a second line passing through the second magnet meet at a point pointing toward the rotation axis. The first and second magnets are arranged such that a straight line interconnecting the rotation axis and the point is interposed therebetween, an angle of the first magnet relative to the straight line being smaller than that of the second magnet relative to the straight line, and a width of the first magnet in the direction parallel to the first line being smaller than that of the second magnet in the direction parallel to the second line. | 02-21-2013 |
20130057103 | MOTOR AND WASHING MACHINE HAVING THE SAME - A motor includes a stator having stator cores, a coil wound around the stator cores, and a rotor disposed at an inner side of the plurality of stator cores. The rotor includes a sleeve, a plurality of rotor cores arranged in a circumferential direction of the rotor, a plurality of bridges arranged to connect the sleeve to each of the plurality of rotor cores, a plurality of permanent magnets provided between the rotor cores to form an interior space with respect to the sleeve while being spaced apart from the sleeve, and a plurality of support protrusions protruding from the sleeve in an outward radial direction of the sleeve to support the plurality of permanent magnets while corresponding to the plurality of permanent magnets, respectively, the plurality of support protrusions being arranged between the bridges while being spaced apart from the bridges in the circumferential direction of the rotor. | 03-07-2013 |
20130088111 | ROTOR FOR A MOTOR AND CONNECTING PIN FOR THE ROTOR - A rotor for a motor is provided including: a rotor core including at least one a first coupling portion on an outer circumference thereof, wherein the first coupling portion includes a first coupling groove or a first coupling projection; at least one division core spaced apart from the rotor core and including a second coupling portion on an outer circumference thereof, the second coupling portion including a second coupling groove or a second coupling projection; and a connecting pin including a third coupling portion and a fourth coupling portion, the third coupling portion to be coupled to the first coupling portion and the fourth coupling portion to be coupling to the second coupling portion. | 04-11-2013 |
20130113324 | TAPERED ROTOR ASSEMBLY - A rotor assembly for an electric machine includes an outer sleeve and a plurality of permanent magnets disposed in the outer sleeve. An inner sleeve is located inboard of the plurality of permanent magnets and includes a plurality of inner sleeve segments that form a tapered inner sleeve surface. A rotor shaft is located inboard of the inner sleeve and has a tapered outer shaft surface engageable with the tapered inner sleeve surface in an interference fit to force the plurality of inner sleeve segments into engagement with the plurality of permanent magnets. | 05-09-2013 |
20130113325 | ROTATING ELEMENT WITH EMBEDDED PERMANENT MAGNET AND ROTATING ELECTRICAL MACHINE - A rotating element with embedded permanent magnets is provided that includes: a rotor core adapted to be within the diameter direction of a stator; first permanent magnets embedded near the exterior circumference face of the core, and orthogonally extending with a d axis; and second permanent magnets embedded on both sides of each of the first magnets, and extending along a q axis. The rotating element further includes gaps formed in the core away from both circumference direction ends of the first magnets. The gaps further include exterior end parts at the furthermost exterior side with respect to the diameter direction of the core, and interior end parts at the furthermost interior side with respect to same. The magnetic pole faces of the first magnets are located between the exterior and interior end parts of the gaps. | 05-09-2013 |
20130147301 | PERMANENT MAGNET ROTOR AND ELECTRIC MOTOR INCORPORATING THE ROTOR - A permanent magnet rotor includes a shaft, a rotor core fixed to the shaft, and multiple magnet sets. The rotor core has multiple groove sets for receiving the magnet sets. Each groove set has two grooves spaced apart by a first section of the rotor core. The first section has a width gradually decreasing from a radially inner end to a radially outer end. Each groove has a width gradually increasing from a radially inner end to a radially outer end. Each magnet set includes two magnets respectively received in the grooves of a respective groove set. The magnets of a magnet set are magnetized in a same direction, and every two adjacent magnet sets are magnetized in contrary directions creating multiple magnetic poles. The number of magnetic poles is equal to the number of magnet sets. | 06-13-2013 |
20130162090 | PERMANENT MAGNET ROTOR - A permanent magnet rotor includes a shaft, a rotor core fixed to the shaft, a bracket fixed to the rotor core, and a plurality of permanent magnets contacting an outer surface of the rotor core. The bracket includes a base at one axial end thereof, a plurality of arms axially extending from the base and spaced in a circumferential direction, and an end ring connecting the arms at the other axial end thereof. The base has an opening for the insertion of the shaft. The rotor core is positioned between the arms. Each magnet is sandwiched between two adjacent arms. An inner diameter of the end ring is greater than an outer diameter of the rotor core. | 06-27-2013 |
20130169099 | MAGNET ASSEMBLY FOR PERMANENT MAGNET MACHINE - A rotor or stator hub for an electric machine includes a plurality of magnets arranged in a predetermined same pattern on a plurality of uniformly sized carrier plates. A plurality of permanent magnets are uniformly mounted on each of the carrier plates proximate a first edge of the carrier plate and spaced away from a second edge of the carrier plate. The carrier plates may be mounted on a rotor or stator hub in a predetermined configuration to create a plurality of axial array groups. | 07-04-2013 |
20130187506 | MOTOR AND ROTOR THEREOF - A rotor having an improved structure capable of achieving enhanced durability is disposed in a motor, the rotor including a sleeve having a shaft hole, through which a motor shaft extends, rotor cores spaced apart from one another in a circumferential direction of the rotor, and permanent magnets each disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve. First and second cover plates may be disposed at opposite sides of the permanent magnets in an axial direction. Each of the first and second cover plates may include a shaft receiving hole to receive the motor shaft. The rotor may include a plurality of support members each having a magnet support portion arranged to support an outer end of a corresponding one of the permanent magnets in a radial direction of the rotor. | 07-25-2013 |
20130207499 | ROTOR ASSEMBLY FOR MOTOR AND SPINDLE MOTOR INCLUDING THE SAME - There are provided a rotor assembly for a motor and a spindle motor including the same. The rotor assembly includes: a rotor case including a rotor hub fixed to a shaft, a rotor extension part extended from the rotor hub in an outer radial direction, and a magnet coupling part extended from the rotor extension part in a downward axial direction; and a magnet provided on an inner surface of the magnet coupling part, wherein a thickness of the magnet in a radial direction may correspond to 8.5 to 20% of a distance from a center of rotation of the rotor case to an edge of the rotor case in the outer radial direction. | 08-15-2013 |
20130257211 | ROTOR UNIT, ROTATING ELECTRICAL MACHINE, AND METHOD OF MANUFACTURING ROTOR UNIT - A rotor unit includes a plurality of rotating bodies arranged along a central axis. Each of the plurality of rotating bodies includes an annular rotor core surrounding the central axis, a plurality of magnets arranged in the circumferential direction around the rotor core, and a holder arranged to hold the magnets. Further, the holder includes a plurality of partitioning portions each axially extending between respective ones of the plurality of magnets. The axial dimension of the plurality of partitioning portions is longer than the axial dimension of the respective ones of the plurality of magnets which are held by the plurality of partitioning portions. Further, the plurality of rotating bodies is disposed in a state where the circumferential positions of the plurality of magnets are out of alignment. | 10-03-2013 |
20130285498 | ROTOR OF BRUSHLESS DC MOTOR - Disclosed herein is a rotor of a brushless direct current motor including magnets, a core in which the magnets are accommodated, a rotating shaft inserted into the core, and a pair of cover members inserted into the rotating shaft to cover both ends of the core, respectively. | 10-31-2013 |
20130328432 | MOTOR HAVING SPOKED OUTER ROTOR WITH SPACED APART POLE SEGMENTS - An electric motor is provided. The electric motor comprises a stator and a rotor rotatable about an axis and spaced at least in part radially outside the stator. The rotor includes a plurality of arcuately spaced apart pole segments, a plurality of arcuately spaced apart magnets alternately arranged with the pole segments such that each of the pole segments is positioned between an adjacent pair of the magnets, a rotor can at least in part supporting the pole segments and the magnets, and a plurality of pegs. Each of the pole segments defines an opening therethrough and includes a generally arcuately extending wall structure positioned radially outside of and at least in part defining the opening. Each of the pegs extends through a corresponding one of the openings to secure a corresponding one of the pole segments relative to the can. | 12-12-2013 |
20130342064 | ROTOR AND MOTOR HAVING THE SAME - Disclosed is a rotor and a motor having the rotor, the motor including a rotor including a rotor core including a body centrally formed with a rotation shaft hole, at least two first disengagement prevention units protruded to a radially external side along a periphery of the body, and a second disengagement prevention unit mounted to a circumferential direction of the body from each distal end of the first disengagement prevention units, and two or more magnets including a rear surface contacting the body of the rotor core, a lateral surface contacting the first disengagement prevention unit and a front surface contacting the second disengagement prevention unit, a rotation shaft coupled to the rotation shaft hole, and a stator core and a coil wound on the stator core for rotating the rotor. | 12-26-2013 |
20140035418 | MOTOR STATOR WITH REDUCED COIL CONFIGURATION - A motor is provided for use in a machine. The motor includes a segmented stator comprising magnetically isolated core segments. | 02-06-2014 |
20140042855 | Permanent-Magnet (PM) Rotors and Systems - Permanent-magnet (PM) rotors, rotor components, and machines using PM rotors. | 02-13-2014 |
20140103769 | RADIALLY EMBEDDED PERMANENT MAGNET ROTOR AND METHODS THEREOF - In one embodiment, a permanent magnet rotor is provided. The permanent magnet rotor includes a shaft comprising an outer diameter, a first hub coupled about the shaft outer diameter, and a first plurality of pole pieces positioned radially about the hub. The rotor further includes a plurality of permanent magnets positioned radially about the hub. The plurality of pole pieces and the plurality of permanent magnets define a rotor outer diameter, and the rotor outer diameter is magnetically isolated from shaft. | 04-17-2014 |
20140111051 | ROTOR AND ROTATING ELECTRIC MACHINE HAVING THE SAME - A rotor has a rotor shaft, a rotor boss, a first magnetic pole, a second magnetic pole, an end cover, and a radially-outer cover. The first and the second magnetic poles are placed to a radially outer periphery of the rotor boss to be alternately arranged in a circumferential direction. A space is defined between the end cover and the first magnetic pole or the second magnetic pole, which is made of a magnet. The radially-outer cover has a first end portion and a second end portion, at least one of the first end portion and the second end portion being defined as a particular end portion. The particular end portion of the radially-outer cover is inwardly crimped onto the end cover in a radial direction. | 04-24-2014 |
20140152137 | MOTOR WITH VARIABLE MAGNET FLUX - Disclosed therein is a motor with a variable magnetic flux, which includes a rotor and a stator located inside the rotor. The rotor includes a rotor housing, a rotor core attached to the inner circumference of the rotor housing, and magnets attached to the inner surface of the rotor core. The stator includes a stator core base and a plurality of teeth radially formed on the outer peripheral surface of the stator core base at equal intervals, and each of the teeth has ears formed at both sides of an end thereof. The magnets are divided into first magnets and second magnets, the second magnets are low in coercive force than the first magnets, and a plurality of the first magnets are located at both sides of the second magnets. | 06-05-2014 |
20140239764 | LAMINATED ROTOR WITH IMPROVED MAGNET ADHESION AND METHOD OF FABRICATING - In one aspect, a moisture resistant rotor sleeve is provided. The rotor sleeve includes a plurality of stacked laminations forming a sleeve having an outer periphery, an inner periphery, and spaces between adjacent laminations. The rotor sleeve also includes a sealant applied into the spaces between the adjacent laminations, wherein the sealant seals the spaces to prevent air from traveling through the spaces of the sleeve between the inner periphery and the outer periphery. | 08-28-2014 |
20140285048 | REDIAL AND AXIAL FLUX MOTOR USING INTEGRATED WINDINGS - The present disclosure relates to a radial and axial flux motor using integrated windings, which includes a rotor which includes a rotor core having a shape of a hollow cylindrical case, and permanent magnets for an inner lateral surface and permanent magnets for a ceiling surface that are coupled to the inner lateral surface and the ceiling surface of the rotor core respectively, and which is rotated about a shaft, and a stator which includes a stator core and windings coupled to the stator core and which is installed in the rotor. Therefore, a radial flux motor and an axial flux motor are integrated into one motor to be able to increase both efficiency and output. | 09-25-2014 |
20140300233 | ROTATOR MEMBER TO BE FIXED TO ROTARY SHAFT OF ROTARY ELECTRIC MACHINE, ROTATOR INCLUDING ROTATOR MEMBER, AND METHOD FOR MANUFACTURING ROTARY ELECTRIC MACHINE AND ROTATOR - A rotator member | 10-09-2014 |
20140361654 | BRUSHLESS PERMANENT-MAGNET MOTOR - A brushless permanent-magnet motor includes a rotor, a magnet set mounted at the rotor, a stator coaxially surrounding the magnet set in a coaxial manner relative to the rotor, and a bushing set between the magnet set and the stator in a coaxial manner relative to the rotor and the stator. The stator has a plurality of teeth spaced around the inner perimeter thereof and a retaining crevice defined between the distal front end portions of each two adjacent teeth remote from the inner perimeter. The bushing has a plurality of locating ribs respectively engaged into the retaining crevices of the stator. Thus, the brushless permanent-magnet motor has a high level of structural stability, and can effectively reduce the air-gap flux density variation and instant cogging torque and torque ripples and solve vibration and noise problems. | 12-11-2014 |
20140361655 | BRUSHLESS PERMANENT-MAGNET MOTOR - A brushless permanent-magnet motor includes a stator, a rotor rotatably mounted within the stator in a coaxial manner, a magnet set including a plurality of magnet components mounted around the periphery of the rotor and leaving a gap between the magnet set and the stator, and two locating plates made from a magnetically conductive material and respectively mounted at two opposite sides of the rotor for synchronous rotation with the magnet set and the rotor. Thus, the brushless permanent-magnet motor has a high level of structural stability, and can effectively improve the air-gap flux density and electromagnetic torque under the rated revolving speed to further enhance the performance of the motor. | 12-11-2014 |
20150061444 | ELECTRIC MOTOR - An electric motor includes: a ring-shaped stator including a field coil; and a rotor holding a permanent magnet in a magnet holding portion on an outer circumference thereof in an exposed state and being supported to be rotatable about a rotary shaft core in an inner space of the stator, wherein the magnet holding portion is configured to have a magnet insertion portion and a pair of regulation bodies, and the permanent magnet is configured to include a cylindrical outer wall surface, a rear wall surface, a pair of side wall surfaces, and a pair of engaged surfaces. | 03-05-2015 |
20150130317 | ROTOR AND MOTOR USING THE SAME - A rotor includes a rotor body and a plurality of permanent magnet received in the rotor body. The rotor body separately defines a plurality of recess troughs on an outer wall of the rotor body. Side surfaces of each recess trough include a bottom surface and two side surfaces. The bottom surface is coupled between the two side surfaces. The bottom surface is a planar surface, and each side surface is a curved surface. The rotor body further defines a plurality of receiving grooves around a circumferential direction of the rotor body and extends along the vertical axis of the rotor body. Each receiving groove receives at least one permanent magnet. Each two adjacent receiving grooves are positioned under one bottom surface, and sidewalls of each two adjacent receiving grooves and the corresponding one bottom surface cooperatively form a T-shaped region. | 05-14-2015 |
20150145368 | Rotor Support for an Electrical Machine, Support Element for a Rotor Support and Method of Producing a Support Element - A rotor arm for an electrical machine having a support pot, which includes a hub for the mounting of a drive shaft, for mounting at least one magnetic element is provided. The rotor arm includes a supporting disk arranged on a support pot at a distance axially from the hub. The supporting element has a passage aligned with the hub for mounting the drive shaft. | 05-28-2015 |
20150340913 | LOW-COG PERMANENT MAGNET MOTOR - A low-cog permanent magnet motor includes a stator and a rotor. The stator includes a plurality of bobbins. The bobbins are arranged in a radial pattern. Each of the bobbins forms a pole shoe, and the pole shoes are arranged in a ring shape. The rotor includes an outer sleeve which encloses the stator and includes an even number of permanent magnets attached to an inner wall of the outer sleeve. The permanent magnets are arranged in a ring shape. Each of the pole shoes includes an outer curved surface facing an inner wall of the outer sleeve and includes an inner arc surface opposite to the outer arc surface, and a radius of the outer arc surface is smaller than a radius of the inner arc surface. A cogging torque is reduced by changing a shape of the pole shoe. | 11-26-2015 |
20150340916 | MOTOR ROTOR AND POSITIONING RING THEREOF - A motor rotor includes a cylindrical housing, a positioning ring and a plurality of magnets. The cylindrical housing includes a plurality of securing holes. The positioning ring is disposed on the cylindrical housing. The positioning ring is disposed with a plurality of flexible ribs and a plurality of securing ribs disposed corresponding thereto. Each of the flexible ribs is radially pressable. The flexible ribs are disposed in the cylindrical housing, and each of the securing ribs is inserted in a respective corresponding one of the securing holes. The magnets are disposed in the cylindrical housing. Each of the magnets is clamped between the adjacent flexible ribs and is arranged annularly along an inner wall of the cylindrical housing, so as to facilitate assembly. | 11-26-2015 |
20150380998 | MOTOR HAVING SPOKED OUTER ROTOR WITH SPACED APART POLE SEGMENTS - An electric motor is provided. The electric motor comprises a stator and a rotor rotatable about an axis and spaced at least in part radially outside the stator. The rotor includes a plurality of arcuately spaced apart pole segments, a plurality of arcuately spaced apart magnets alternately arranged with the pole segments such that each of the pole segments is positioned between an adjacent pair of the magnets, a rotor can at least in part supporting the pole segments and the magnets, and a plurality of pegs. Each of the pole segments defines an opening therethrough and includes a generally arcuately extending wall structure positioned radially outside of and at least in part defining the opening. Each of the pegs extends through a corresponding one of the openings to secure a corresponding one of the pole segments relative to the can. | 12-31-2015 |
20160020656 | ELECTRIC MACHINE, ROTOR AND ASSOCIATED METHOD - A rotor for connection to a rotating member for use in an electric machine is provided. The rotor includes a first member connected to the rotating member and generally positioned perpendicularly thereto and a second member connected to one of the rotating member and the first member. | 01-21-2016 |
20160036275 | ROTOR AND METHOD FOR PRODUCING A ROTOR - A rotor includes a rotor shaft with a mounting portion along a mounting region of the shaft; and a plurality of permanent magnets mounted in the mounting portion on the rotor shaft, wherein the rotor shaft includes, in the mounting portion, a region with a radius reduced with respect to a circular cross-section, such that a radially measured thickness of a permanent magnet is greater in the region than in an adjacent region with non-reduced radius of the rotor shaft. | 02-04-2016 |
20160072346 | ROTOR FOR AN ELECTRIC MACHINE - A rotor for an electric machine is mounted for rotation about an axis and includes a plurality of permanent magnets placed on a radial outer surface of the rotor for forming at least one magnetic pole pair. An anisotropically-soft sintered magnetic material having an easy direction and a hard direction is located in at least one section of the rotor radially further inward than the plurality of permanent magnets. | 03-10-2016 |
20160072349 | ROTOR FOR AN ELECTRIC MACHINE - A rotor for an electric machine, comprising a modular design consisting of a plurality of modular elements is disclosed. These modules are arranged adjacent to each other in a direction of movement of the rotor. Each modular element has at least one magnet and at least one ferromagnetic pole shoe, and the poles of the magnet are aligned in the direction of movement of the rotor. An electric machine comprising a stator and a rotor according to the invention is also disclosed. | 03-10-2016 |
20160099619 | Brushless Electrical Machine with Permanent Magnets - The machine is designed for traction motors in electrically driven vehicles, for regulable motors for drives in machine tools with CNC and for other servo-drives and generators running into overload duty. It provides reduced mass at increased resistance of the magnets against demagnetization at higher torque overloads. The rotor yoke is divided into parts, which are fixed on the non-magnetic disks. On each two adjacent edges of the parts of the rotor yoke is formed a common mounting pad, on which is located a permanent magnet. The edges of the parts are tapered and between them are formed void spaces with a trapezoidal cross-section with small base near the permanent magnet and with a larger base adjacent to non-magnetic disks. The ratio of the larger base to the small base is greater than 10. | 04-07-2016 |
20160126790 | ELECTRIC MACHINE HAVING ROTOR WITH SLANTED PERMANENT MAGNETS - An electric machine including a rotor and an annularly-shaped first stator is provided. The rotor includes an annularly-shaped rotor body and permanent magnets positionally-fixed relative to the rotor body. The first stator includes circumferentially-spaced stator poles. The rotor and the first stator are concentric and axially-aligned relative to an axial centerline of the electric machine. Each of the permanent magnets creates a magnetic dipole. Each magnetic dipole extends along a dipole axis that passes through the respective permanent magnet. Each dipole axis extends in a first plane. The centerline of the electric machine extends in a second plane that is at least substantially perpendicular to the first plane. Each of the permanent magnets is positioned so that a magnet angle that is between 15° and 75° is defined between the respective dipole axis and a radial axis that extends between the respective permanent magnet and the centerline. | 05-05-2016 |
20160141929 | ROTOR MEMBER, ROTOR, ELECTRIC MOTOR, MACHINE TOOL, AND MANUFACTURING METHOD OF ROTOR - A rotor member includes a cylindrical sleeve part having a circular outer peripheral surface, a plurality of magnets arranged along the outer peripheral surface and including an inner peripheral surface having a curvature radius larger than a curvature radius of the outer peripheral surface, and a cylindrical holding member surrounding the plurality of magnets. Between the outer peripheral surface of the sleeve part and the inner peripheral surface of the magnets, a gap of a radial direction increased toward a circumferential edge portion of the magnets is formed. | 05-19-2016 |
20160141931 | ROTOR COMPONENT MEMBER, ROTATING AXIS, ROTOR, MOTOR, AND MACHINE TOOL - A rotor according to the present invention includes a rotating axis rotating about an axial center of the rotating axis and a rotor component member including an inner circumferential surface on which an outer circumferential surface of the rotating axis fits. The outer circumferential surface of the rotating axis and the inner circumferential surface of the rotor component member include corresponding tapered surfaces each having a diameter that varies in taper along the axial center, the tapered surfaces being in full contact with each other while the outer circumferential surface of the rotating axis is press-fitted relative to the inner circumferential surface of the rotor component member, and at least one of the tapered surfaces has a corrugated surface structure storing a lubricant before the rotating axis is press-fitted relative to the rotor component member, while configured to wear away by press-fitting the rotating axis relative to the rotor component member to discharge the lubricant. | 05-19-2016 |