公开(公告)号：US11967915B2

公开(公告)日：2024-04-23

申请号：US17778544

申请日：2020-11-04

申请人： Hitachi Astemo, Ltd.

发明人： Takaya Tsukagoshi ,  Takafumi Hara ,  Katsuhiro Hoshino ,  Toshiyuki Ajima

IPC分类号： H02P27/08 ,  B62D5/04 ,  H02M1/12 ,  H02M7/5395 ,  H02P6/10 ,  H02P21/18

CPC分类号： H02P27/08 ,  B62D5/046 ,  H02M1/12 ,  H02M7/5395 ,  H02P6/10 ,  H02P21/18

摘要： The vibration and noise generated in a permanent magnet synchronous motor are effectively suppressed. A motor control device 1 comprises: a triangular wave generation unit 17 which generates a triangular wave signal Tr that is a carrier wave, a carrier frequency adjustment unit 16 which adjusts a carrier frequency fc that represents a frequency of the triangular wave signal Tr, and a gate signal generation unit 18 which performs pulse-width modulation on three-phase voltage commands Vu*, Vv*, Vw* according to a torque command T* using the triangular wave signal Tr, thereby generating a gate signal for controlling an operation of an inverter. The carrier frequency adjustment unit 16 adjusts the carrier frequency fc so as to change a voltage phase error Δθv representing a phase difference of the three-phase voltage commands Vu*, Vv*, Vw* and the triangular wave signal Tr based on the torque command T*, and a rotation speed ωr of a motor.

公开(公告)号：US12074551B2

公开(公告)日：2024-08-27

申请号：US17918197

申请日：2021-01-22

申请人： Hitachi Astemo, Ltd.

发明人： Takafumi Hara ,  Toshiyuki Ajima ,  Takaya Tsukagoshi ,  Katsuhiro Hoshino

IPC分类号： H02P27/08 ,  B60L53/20 ,  H02P23/14

CPC分类号： H02P27/08 ,  B60L53/20 ,  H02P23/14 ,  B60L2210/40

摘要： The present invention addresses the problem of properly performing motor control during overmodulation. In a motor control device 1, a carrier wave frequency adjusting unit 16 adjusts a carrier wave frequency fc so as to change a voltage phase error Δθv representing the phase difference between three-phase voltage commands Vu*, Vv*, Vw* and a triangular wave signal Tr. When a modulation factor H in accordance with the voltage amplitude ratio between the DC power supplied from a high voltage battery to an inverter and AC power output from the inverter to a motor exceeds a predetermined value, for example, 1.15, a current control unit 14 corrects the amplitudes and phases of a d-axis voltage command Vd* and a q-axis voltage command Vq* on the basis of a carrier wave phase difference Δθcarr representing the phase of the triangular wave signal Tr.