POLYPHASE ELECTRIC MOTOR DRIVE DEVICE

WIPO Patent Application WO/2022/137395

A1

In the polyphase electric motor drive device of an embodiment, a first main circuit is connected to a first winding of a polyphase electric motor, and AC power is supplied to the first winding on the basis of a first pulse width modulation (PWM) signal modulated using a single-phase PWM method. A second main circuit is connected to a second winding, and AC power is supplied to the second winding on the basis of a second PWM signal modulated using the PWM method. A first control unit supplies the first PWM signal, which is based on a first voltage reference and a first carrier signal, to the first main circuit. A second control unit supplies the second PWM signal, which is based on a second voltage reference and a second carrier signal, to the second main circuit. In the first control unit and the second control unit, in which a first AC phase based on the first voltage reference and a second AC phase based on the second voltage reference are in a same-phase relationship or a phase relationship that is comparatively close to the same-phase relationship, the relationship between the first carrier signal phase and the second carrier signal phase is a reverse-phase relationship or a phase relationship that is comparatively close to the reverse-phase relationship.

IIDA RYO (JP)
OZAWA JUNJI (JP)

PCT/JP2020/048231

June 30, 2022

December 23, 2020

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TOSHIBA MITSUBISHI ELEC IND (JP)

H02P25/22; H02P27/06

JP2012257456A	2012-12-27
JP2014003783A	2014-01-09
JP2009268276A	2009-11-12

TANAI Sumio et al. (JP)

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