Title:
MOTOR CONTROL DEVICE, MOTOR SYSTEM AND INVERTER CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2020/059814
Kind Code:
A1
Abstract:
In this inverter control method, a detection signal corresponding to the current value of current flowing on the DC side of an inverter that drives a motor is acquired on the basis of a PWM signal. By acquiring said detection signal on the basis of the PWM signal, the phase current of each phase flowing through the motor is detected, and the duty ratio of each phase of the PWM signal is set on the basis of the detected value of the phase current of each phase. The PWM signal is generated by comparing the set value of the duty ratio of each phase with the level of the carrier, and on the basis of the set value of the duty ratio of each phase, the first energization time within the first half cycle period of the carrier and the second energization time within the second half cycle period of the carrier are calculated. On the basis of the calculated values of the first and second energization times, the first and second energization times are adjusted to the energization width in which the current detection unit can detect the phase current of two of the phases.
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Inventors:
OBA TAKASHI (JP)
Application Number:
PCT/JP2019/036816
Publication Date:
March 26, 2020
Filing Date:
September 19, 2019
Export Citation:
Assignee:
MINEBEA MITSUMI INC (JP)
International Classes:
H02M7/48; H02P27/08
Foreign References:
| JP2015061381A | 2015-03-30 | |||
| US20030173946A1 | 2003-09-18 | |||
| JPH10155278A | 1998-06-09 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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