- 专利标题: Motor control method, motor control system, and electric power steering system
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申请号: US16330844申请日: 2017-08-01
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公开(公告)号: US10560044B2公开(公告)日: 2020-02-11
- 发明人: Ahmad Ghaderi
- 申请人: Nidec Corporation
- 申请人地址: JP Kyoto
- 专利权人: NIDEC CORPORATION
- 当前专利权人: NIDEC CORPORATION
- 当前专利权人地址: JP Kyoto
- 代理机构: Keating & Bennett
- 优先权: JP2016-174319 20160907
- 国际申请: PCT/JP2017/027845 WO 20170801
- 国际公布: WO2018/047524 WO 20180315
- 主分类号: H02P21/09
- IPC分类号: H02P21/09 ; H02P23/24 ; H02P6/00 ; H02P21/16 ; H02P21/22 ; B62D5/04
摘要:
A motor control method includes acquiring a component BEMFα on an α-axis and a component BEMFβ on a β-axis of counter electromotive force of a motor in an αβ-fixed coordinate system; performing time differentiation on the component BEMFα on the α-axis and the component BEMFβ on the β-axis; obtaining a difference value between first and second multiplication values, the first multiplication value being obtained by multiplying the component BEMFα on the α-axis by a differential value of the component BEMFβ on the β-axis, the second multiplication value being obtained by multiplying the component BEMFβ on the β-axis by a differential value of the component BEMFα on the α-axis; detecting a rotation direction of the rotor based on the difference value; and controlling the motor based on a detection result of the rotation direction of the rotor.
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