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    Rotary electric machine and in-vehicle motor system
    3.
    发明授权
    Rotary electric machine and in-vehicle motor system 有权

    公开(公告)号：US12107470B2

    公开(公告)日：2024-10-01

    申请号：US17786626

    申请日：2020-12-15

    申请人： Hitachi Astemo, Ltd.

    发明人： Kazutami Tago ,  Itsuki Shimura ,  Junnosuke Nakatsugawa ,  Wataru Yokoyama ,  Ippei Suzuki

    IPC分类号： H02K1/27 ,  H02K1/276 ,  H02K1/28 ,  H02K21/16 ,  H02K7/00

    CPC分类号： H02K21/16 ,  H02K1/276 ,  H02K7/006 ,  H02K2213/03

    摘要： A rotary electric machine includes a stator including a coil, and a rotor in an inner peripheral side of the stator. The rotor core comprises a soft magnetic metal and a magnet within a magnet insertion hole, a first magnet stopper on a q axis side of the magnet in the magnet insertion hole, a magnet accommodation between the first magnet stopper on both sides of the magnet insertion hole, a first space portion communicating with the magnet insertion hole, a second space portion whose distance from the magnet is equal to or less than a thickness of the magnet and a radial length of a magnetic pole center is long, the second space portion formed on an inner peripheral side relative to the magnet, and a third space portion that has a convex shape on an inner peripheral side of a q axis of the magnet.

    Rotary electric machine
    8.
    发明授权
    Rotary electric machine 有权

    公开(公告)号：US12081087B2

    公开(公告)日：2024-09-03

    申请号：US17881837

    申请日：2022-08-05

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Takeshi Kitayama ,  Hiroyuki Hattori

    IPC分类号： H02K1/27 ,  H02K1/276 ,  H02K21/02

    CPC分类号： H02K21/028 ,  H02K1/27 ,  H02K1/2766

    摘要： A rotary electric machine includes: a shaft that rotates about an axial direction; a rotor that is disposed around the shaft and that includes a rotor core and a plurality of magnets provided in the rotor core; a stator that is disposed around the rotor and that includes a stator core and a stator coil provided in the stator core; a magnetic flux short circuit plate that is disposed so as to face the rotor core in the axial direction and that moves in the axial direction; a biasing member that biases the magnetic flux short circuit plate to a side away from the rotor core; a holding member that holds the biasing member; and a fixing member that fixes the holding member to the shaft. Further, a strength of a material of the fixing member is higher than a strength of a material of the holding member.

    Permanent magnet machine fault protection
    9.
    发明授权
    Permanent magnet machine fault protection 有权

    公开(公告)号：US12081015B2

    公开(公告)日：2024-09-03

    申请号：US17860550

    申请日：2022-07-08

    申请人： Hamilton Sundstrand Corporation

    发明人： Kyle Stephen Ives ,  Robert L. Seagren

    IPC分类号： H02H7/085 ,  H02K1/27

    CPC分类号： H02H7/0851 ,  H02K1/27

    摘要： A system includes a permanent magnet (PM) machine including a first phase winding and a second phase winding and a permanent magnet configured to rotate relative to the first and second phase windings. The first phase winding has a main leg and a return leg extending from the first phase winding. The second phase winding has a main leg and a return leg extending from the second phase winding. A return switch unit is operatively connected to the return legs of the first phase winding and the second phase winding. The return switch unit includes a switch configured to connect the return legs of the first phase and second phase to a neutral node in the return switch unit in a normal state, and to disconnect the return legs of the first and second phase windings from the neutral node in a fault protection state.