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1. (WO2018061818) POWER CONVERSION DEVICE, MOTOR DRIVING UNIT, AND ELECTRIC POWER-STEERING DEVICE

Pub. No.:    WO/2018/061818    International Application No.:    PCT/JP2017/033392
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Sat Sep 16 01:59:59 CEST 2017
IPC: H02P 27/06
B62D 5/04
B62D 6/00
H02M 7/48
H02P 29/024
B62D 101/00
B62D 119/00
Applicants: NIDEC CORPORATION
日本電産株式会社
Inventors: OHASHI,Hiromitsu
大橋 弘光
Title: POWER CONVERSION DEVICE, MOTOR DRIVING UNIT, AND ELECTRIC POWER-STEERING DEVICE
Abstract:
A power conversion device 100 comprises: a first inverter 120 that is connected to one end of each phase winding of a motor; a second inverter 130 that is connected to the other end of each phase winding of the motor; a first switching circuit 110A; and a second switching circuit 110B. The power conversion device has a normal-time operation mode in which power conversion is performed using the first inverter and first neutral points of the phase windings which are configured in the second inverter, and an abnormal-time operation mode in which power conversion is performed using the second inverter and second neutral points of the phase windings which are configured in the first inverter. When at least one out of a plurality of switching elements included in the first inverter has broken down, the power conversion operation mode is switched from the normal-time operation mode to the abnormal-time operation mode.