Title:
MOTOR CONTROL DEVICE, ELECTROMECHANICAL UNIT, ELECTRIC VEHICLE SYSTEM, AND MOTOR CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2021/210232
Kind Code:
A1
Abstract:
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.
Inventors:
HARA TAKAFUMI (JP)
AJIMA TOSHIYUKI (JP)
TSUKAGOSHI TAKAYA (JP)
HOSHINO KATSUHIRO (JP)
AJIMA TOSHIYUKI (JP)
TSUKAGOSHI TAKAYA (JP)
HOSHINO KATSUHIRO (JP)
Application Number:
PCT/JP2021/002147
Publication Date:
October 21, 2021
Filing Date:
January 22, 2021
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02P27/08; B60L9/18; H02M7/48
Domestic Patent References:
| WO2017037941A1 | 2017-03-09 |
Foreign References:
| JP2009291019A | 2009-12-10 | |||
| JP2017192197A | 2017-10-19 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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