公开(公告)号：US20230079383A1

公开(公告)日：2023-03-16

申请号：US17990946

申请日：2022-11-21

申请人： DENSO CORPORATION

发明人： Makoto TANIGUCHI ,  Yuuko OHTANI ,  Shinya URATA ,  Hideo NAKAI ,  Kenji HIRAMOTO

IPC分类号： H02K17/12 ,  H02K1/27 ,  H02P27/06 ,  H02P25/08 ,  H02K3/04

摘要： A motor system of the present disclosure includes a permanent magnet motor including a stator having N-phase windings and a rotor having a permanent magnet, N being a natural number greater than or equal to three, an inverter that supplies N-phase drive currents for generating a rotating magnetic field to the stator, and a zero-phase current supply unit that supplies a zero-phase current to the N-phase windings of the stator. The motor system applies the zero-phase current to the N-phase windings in response to an inter-terminal voltage of the permanent magnet motor reaching a predetermined value of the inter-terminal voltage.

公开(公告)号：US20210313912A1

公开(公告)日：2021-10-07

申请号：US17352630

申请日：2021-06-21

申请人： DENSO CORPORATION

发明人： Makoto TANIGUCHI ,  Kazunari MORIYA ,  Kenji HIRAMOTO ,  Hideo NAKAI ,  Yuuko OHTANI ,  Shinya URATA ,  Masafumi NAMBA

IPC分类号： H02P6/30

摘要： An electric motor system includes a battery, an inverter, an electric motor, a zero-phase switching arm and a control unit. The inverter converts DC power output from the battery into three-phase AC power and outputs the three-phase AC power to the electric motor. A rotor of the electric motor rotates by the three-phase AC power output from the inverter. A neural point of the electric motor is connected to the zero-phase switching arm. A zero-phase current flowing through respective windings of the electric motor is adjusted by switching of the zero-phase switching arm. By this means, in the electric motor system, torque is generated at the rotor also using the zero-phase current as well as a three-phase AC current flowing through the respective windings.