Title:
MOTOR CONTROL DEVICE AND MOTOR SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/014947
Kind Code:
A1
Abstract:
Provided is a motor control device capable of suppressing noise. The motor control device (100) is provided with: a control unit (20) for generating PWM signals corresponding to the respective phases (U, V, W) of a motor (4); an inverter circuit (23) for driving the motor on the basis of the PWM signals; and a current detector (24) connected to a DC line of the inverter circuit in series. The control unit has: a current detection unit (27); a duty ratio setting unit (39) for setting duty ratios on the basis of the detection results of the current detection unit (27); and a PWM signal generation unit (32) for generating the PWM signals. The PWM signals of the respective phases change in the signal levels in a first period of one cycle of the PWM signals at timings according to the set duty ratios and change in the signal levels in a second period of one cycle of the PWM signals at predetermined timings different from each other. The current detection unit detects the current (Sd) of the current detector in the second period.
Inventors:
OBA TAKASHI (JP)
YAMASAKI REIJI (JP)
YAMASAKI REIJI (JP)
Application Number:
PCT/JP2020/026341
Publication Date:
January 28, 2021
Filing Date:
July 06, 2020
Export Citation:
Assignee:
MINEBEA MITSUMI INC (JP)
International Classes:
H02P27/08; H02M7/48
Domestic Patent References:
| WO2011064970A1 | 2011-06-03 |
Foreign References:
| JP2013162536A | 2013-08-19 | |||
| JP2011130616A | 2011-06-30 | |||
| JP2013121204A | 2013-06-17 |
Attorney, Agent or Firm:
EINSEL Felix-Reinhard et al. (JP)
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