Patent application number | Description | Published |
20110101816 | STATOR FOR A ROTATING ELECTRIC MACHINE AND ROTATING ELECTRIC MACHINE - A stator includes a stator-core having slots and teeth, and a back-yoke having convex and concave portions. The convex portions are partially inserted into the slots, and the concave portions receive the teeth. The teeth include tip portions whose circumferential widths become larger along a radial direction from the inside to the outside of the stator. The back-yoke includes convex portions whose circumferential widths become larger along the radial direction from the outside to the inside of the stator. The tip portions and the convex portions have substantially the same shape. The length of a joint portion between the tip portion and the convex portion, the circumferential width of the tooth corresponding to a tip surface of the convex portion, the width of a root portion of the tooth, and the circumferential width of the convex portion corresponding to a bottom face of the concave portion are substantially the same. | 05-05-2011 |
20110163625 | STATOR DESIGNED TO MINIMIZE LEAKAGE CURRENT AND ELECTRIC ROTATING MACHINE USING SAME - A stator which may be employed in an electric rotating machine. The stator includes a stator winding which includes in-slot portions disposed in slots of a stator core. The in-slot portions are arrayed in each of the slots in a form of multiple layers aligned in a radial direction of the stator core. The stator winding is made up of a first winding and a second winding which are connected together through a joint. The first winding is defined by a portion of the stator winding between the joint and an end of the stator winding which is to be connected to an external. The second winding includes the in-slot portion placed within at least one of the slots as an outermost layer that is one of the layers placed most outwardly in the radial direction of the stator core. This results in a great decrease in leakage current. | 07-07-2011 |
20110285238 | DOUBLE-STATOR MOTOR - In a double-stator motor has a rotary shaft, an annular rotor is coupled with a rotary shaft. First and second three-phase stators are arranged inside and outside to the rotor in the radial direction and formed to generate first and second rotating magnetic fields in response to three-phase currents, respectively. The rotor has an even number of segment poles made of soft magnetic material and arranged mutually separately at positions of the rotor. The positions are equally distanced apart from the rotary shaft in the radial direction and in the circumferential direction. Each of the first and second three-phase stators has magnetic poles which are the same in the number of poles as the segment poles and the magnetic poles are positioned such that magnetomotive forces from the magnetic poles are faced to each other between the magnetic poles of the first and second three-phase stators. | 11-24-2011 |
20120080977 | MULTI-GAP ELECTRIC ROTATING MACHINE - In a multi-gap electric rotating machine, a stator core has a radially outer portion, a radially inner portion and a connecting portion. The radially outer portion is located radially outside of a rotor core with a radially outer magnetic gap formed therebetween. The radially inner portion is located radially inside of the rotor core with a radially inner magnetic gap formed therebetween. The connecting portion radially extends to connect the radially outer and inner portions and is located on one axial side of the rotor core with an axial magnetic gap formed therebetween. A stator coil is formed of electric wires mounted on the stator core. Each of the electric wires has radially-outer in-slot portions, radially-inner in-slot portions and radially-intermediate in-slot portions, which are respectively received in slots of the radially outer portion, slots of the radially inner portion and slots of the connecting portion of the stator core. | 04-05-2012 |
20120086288 | ELECTRIC ROTATING MACHINE - An electric rotating machine includes a stator, a rotor, and a plurality of magnetic shields. The stator includes a stator core and a stator coil wound on the stator core. The stator core has a plurality of stator teeth arranged in the circumferential direction of the stator core. The rotor includes a rotor core that has a plurality of magnetic salient poles formed therein. The magnetic salient poles face the stator teeth through an air gap formed therebetween. Each of the magnetic shields is provided, either on the forward side of a corresponding one of the stator teeth or on the backward side of a corresponding one of the magnetic salient poles with respect to the rotational direction of the rotor, to create a magnetic flux which suppresses generation of a negative electromagnetic force that hinders rotation of the rotor. | 04-12-2012 |
20130057100 | ELECTRIC ROTARY MACHINE - An electric rotary machine has a stator, a second rotor, and a first rotor which are arranged in order on a coaxial shaft. The first rotor has a plurality of magnetic poles having a different polarity. The stator has stator winding wires. The second rotor has a magnetic iron core and short circuit conductors. The magnetic iron core has first magnetic passage parts, second magnetic passage parts, and conductor holder parts. Both ends of the short circuit conductor is electrically connected to make a short circuit. The short circuit conductors are fitted to the corresponding conductor holder parts. No short circuit conductor surrounds each of the first magnetic passage parts. The short circuit conductors surround each of the second magnetic passage parts. The first magnetic passage parts and the second magnetic passage parts are alternately arranged along a circumferential direction of the second rotor. | 03-07-2013 |
20130099618 | DOUBLE-STATOR MOTOR - A double-stator motor of an example embodiment includes: an annular rotor connected to a rotary shaft and integrally rotates with the rotary shaft, an inner stator arranged radially inward of the rotor, and an outer stator arranged radially outward of the rotor. The rotor includes a plurality of segments annularly arranged in the circumferential direction, spaced apart from each other by a predetermined distance, and a plurality of permanent magnets each interposed between circumferentially adjacent segments, the permanent magnets being alternately magnetized in the circumferentially opposite direction. The rotor, the inner stator and the outer stator have the same number of poles. The inner and outer stator windings of the inner and outer stators, respectively, are connected so that their phases are reversed to each other. Thus, the magnetic fields generated by the magnetomotive forces of the inner and outer stators are applied to specific segments in parallel. | 04-25-2013 |
20130113333 | MULTI-GAP TYPE ELECTRIC ROTATING MACHINE - In a multi-gap type electric rotating machine, side cores include an outside-side core connected to one end side of an outside core, and an inside-side core connected to one end side of an inside core. The outside-side core includes an outer-side rotor-opposite portion which projects from the inner periphery end of the outside core and is opposite to an end face at the outer periphery side of a rotor. The inside-side core includes an inner-side rotor-opposite portion which projects from the outer periphery end of the inside core and is opposite to an end face at the inner periphery side of the rotor. The outside-side core and the inside-side core are arranged so as to be opposed to each other in the radial direction thereof with a gap being interposed between the inner periphery end of the outer-side rotor-opposite portion and the outer periphery end of the inner-side rotor-opposite portion. | 05-09-2013 |
20130119789 | MULTIPLE-GAP ELECTRIC ROTATING MACHINE - The multiple-gap electric rotating machine includes a rotor cantilever-supported at a first axial end thereof by a rotor arm coupled to a rotating shaft. The rotor includes a laminated core of core sheets made of soft magnetic material and an end-surface core disposed on a surface of the laminated core on a second axial end of the rotor. The laminated core includes segments joined in a ring and each formed with a salient pole structure at each of radially inner and outer peripheries thereof. The end-surface core includes soft magnetic sections made of steel and non-magnetic sections made of stainless steel, which are joined together in a ring. The laminated core is held between the rotor arm and the end-surface core, and fixed to the rotor arm by rivets penetrating through the rotor arm, laminated core and the end -surface core. | 05-16-2013 |
20130193782 | DOUBLE DRIVE SHAFT MOTOR OF MAGNETIC FLUX MODULATION TYPE - In a double drive shaft motor, a stator and a field rotor are arranged at a radially outer side of a magnetic modulation rotor. The stator and the field rotor are arranged in series in an axial direction of the motor. This structure increases an amount of a winding coil of the stator and magnets in the field rotor, and an output torque of the motor. When a field magnetic flux passes through soft magnetic material members in the magnetic modulation rotor, because the generation and the reception of the magnetic flux can occur at a radially same side of the magnetic modulation rotor, this structure cancels an eddy current generated in the soft magnetic members and supporting members made of non-magnetic metal which tightly support the soft magnetic member. This structure provides a reduced axial size of the motor with high performance. | 08-01-2013 |
20130207498 | SYNCHRONOUS MOTOR - A double-stator synchronous motor has a rotor, an inner stator and an outer stator. The rotor has segment-magnetic poles arranged in a ring shape. Magnetic poles formed in the inner stator and the outer stator face to each other in a same circumferential position. Each stator has q (q≧2) slots per pole and phase to disperse magnetomodive force. A radially minimum width Wr of each segment magnetic pole is within a range of 1.3 | 08-15-2013 |
20130221778 | DOUBLE DRIVE SHAFT MOTOR OF MAGNETIC FLUX MODULATION TYPE - A double drive shaft motor has a field rotor supported by a first rotating shaft, a magnetic induction rotor supported by a second rotating shaft, a stator supported by a motor housing casing, a first rotation limitation section arranged between the motor housing casing and the first rotating shaft, a magnetic bi-directional clutch arranged between the motor housing casing and the second rotating shaft, and a magnetic bi-directional clutch arranged between the first rotating shaft and the second rotating shaft. Each magnetic bi-directional clutch operates by receiving a rotational force supplied from the corresponding rotating shaft without using any outside energy to maintain a connection state of the corresponding rotating shaft. The first rotation limitation section is a one-way clutch without requiring any electric control. This makes it possible to make plural operation states, for example, eight operation states from an engine start to an EV drive of a vehicle. | 08-29-2013 |
20130234553 | MAGNETIC MODULATION MOTOR AND ELECTRIC TRANSMISSION - A magnetic modulation motor includes an armature, a magnetic induction rotor, and a magnet rotor. The armature is provided with a multi-phase winding with m pole pairs. The magnetic induction rotor includes k magnetic paths. In the magnet rotor, 2 | 09-12-2013 |
20130264895 | SYNCHRONOUS MOTOR - The synchronous motor includes a rotor including a rotor core constituted of segment poles disposed in a ring and a stator including a stator core disposed radially outward or inward of the rotor with a gap therebetween and a multiple-phase stator winding wound on the stator core. Each of the segment poles has a magnetic salient pole characteristic. The rotor is rotated in synchronization with a rotating magnetic field generated when the multiple-phase stator winding is applied with a multiple-phase AC voltage. The lamination thickness as an axial length of the stator core is shorter than the lamination thickness as an axial length of the rotor core. | 10-10-2013 |
20140028142 | DOUBLE-STATOR MOTOR - A double-stator includes outer and inner stators each having magnetic poles. Outer-stator and inner-stator windings are connected in series in phases, thereby generating winding magnetomotive force. Outer magnets and inner magnets of a rotor are arranged in a rotor core in the circumferential direction, the outer and inner magnets being alternated between a radially outward portion and a radially inward portion, at a pitch equal to that of the poles of the outer and inner stators so as to be magnetized so that a radially outer side thereof will serve as N poles or S poles and that a radially inner side thereof will serve as S poles or N poles. The rotor core includes outer poles formed between the outer magnets circumferentially adjacent to each other in the radially outward portion, and inner poles formed between the inner magnets circumferentially adjacent to each other in the radially inward portion. | 01-30-2014 |
20140159532 | MULTI-GAP TYPE ROTARY ELECTRIC MACHINE - A multi-gap type rotary electric machine is provided, where the machine is provided a shaft supported rotatably by a baring secured to a housing. An annular rotor is secured to the shaft and configured to rotate together with the shaft. Double stators are secured to the housing and configured to have gaps between the stators and the rotor. Relationships of: | 06-12-2014 |
20140159533 | MULTI-GAP TYPE ROTARY ELECTRIC MACHINE - A multi-gap type rotary electric machine is provided, where the machine is provided a shaft supported rotatably by a baring secured to a housing. An annular rotor is secured to the shaft and configured to rotate together with the shaft. Double stators are secured to the housing and configured to have gaps between the stators and the rotor. Relationships of: | 06-12-2014 |
20140232233 | MULTI-GAP ROTATING ELECTRIC MACHINE - A multi-gap rotating electric machine includes a rotor, a stator core and a stator coil. The stator core has inner and outer core parts respectively located radially inside and outside of the rotor and each having partially or fully closed slots. The stator coil is formed of electric conductor segments each having a first leg portion inserted in one of the slots of the inner core part, a second leg portion inserted in one of the slots of the outer core part, and a connecting portion connecting the first and second leg portions on one axial side of the rotor. The first and second leg portions respectively have radially inner and outer coil end parts formed on the opposite axial side to the connecting portion. Corresponding radially inner coil end parts are joined to each other, and corresponding radially outer coil end parts are joined to each other. | 08-21-2014 |
20140265676 | TWO-SHAFT COMPOUND MOTOR - A two-shaft compound motor includes a first rotating machine made of a magnetic modulation motor, a second rotating machines made of an electric motor, and a lockup mechanism. The first and second rotating machines are aligned on same axial line. The first rotating machine includes a first rotating shaft, a first stator, a first rotor made of a magnetic induction rotor, and a second rotor made of a magnet rotor. One of the first and second rotors is provided to be integrally rotatable with the first rotating shaft. The second rotating machine includes a second rotating shaft, a second stator, and a third rotor. The third rotor is mechanically coupled with the other of the first and second rotors, and is provided such as to be integrally rotatable with the second rotating shaft. The lockup mechanism is capable of mechanically direct-coupling the first rotating shaft and the second rotating shaft. | 09-18-2014 |
20150075886 | POWER TRANSMISSION APPARATUS - An electric rotating machine includes a power transmission mechanism and an armature. The power transmission mechanism is equipped with a first, a second, and a third rotor. The first rotor includes n soft-magnetic members. The second rotor includes k soft-magnetic members. Note that n and k are an integer more than one. The third rotor is made up of magnets whose number of pole pairs is m where m is an integer more than or equal to one. The armature faces the third rotor. The first, second, and third rotors are arranged so as to establish a magnetic coupling among them. The soft-magnetic members of the first and second rotors and the magnets of the third rotor meet a relation of 2m=|k±n|. This arrangement is capable of achieving the transmission of power regardless of electric energization of the armature. | 03-19-2015 |
20150076948 | POWER TRANSMISSION APPARATUS - A power transmission apparatus working to magnetically transmit power is provided which includes a first rotor including n soft-magnetic members, a second rotor including k soft-magnetic members, and a third rotor including magnets whose number of pole pairs is m where m is an integer more than or equal to one, the number of the magnets meeting a relation of 2m=|k±n| where n and k are an integer more than one. The first rotor, the second rotor, and the third rotor are arranged in magnetic coupling with each other. The soft-magnetic members of each of the first rotor and the second rotor are arranged at intervals away from each other, thereby minimizing the leakage of magnetic flux flowing from one of the soft-magnetic members to another in each of the first and second rotor to ensure the stability in operation of the power transmission mechanism. | 03-19-2015 |