Title:
MOTOR CONTROL DEVICE AND MOTOR CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/131023
Kind Code:
A1
Abstract:
A motor control device controls a brake motor. The motor control device comprises a first motor drive unit, a first control unit, a second motor drive unit, and a second control unit. The second control unit is connected to the first control unit. The second control unit has a self-diagnosis function that the first control unit does not have. The second control unit monitors the state of the phase current in the first motor drive unit. For example, the second control unit judges that the first control unit is abnormal when the waveform of the phase current in the first motor drive unit is outside the range of the expected current waveform.
Inventors:
FUJITA HARUHIKO (JP)
USUI TAKUYA (JP)
GOTO DAISUKE (JP)
USUI TAKUYA (JP)
GOTO DAISUKE (JP)
Application Number:
PCT/JP2021/044460
Publication Date:
June 23, 2022
Filing Date:
December 03, 2021
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02M7/48; H02P29/024
Foreign References:
| JP2013038864A | 2013-02-21 | |||
| JP2010130793A | 2010-06-10 | |||
| JP2020150584A | 2020-09-17 |
Attorney, Agent or Firm:
YAMAMOTO, Osamu et al. (JP)
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