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1. (WO2018198739) MOTOR DRIVE DEVICE, AND ELECTRIC POWER STEERING DEVICE

Pub. No.:    WO/2018/198739    International Application No.:    PCT/JP2018/014878
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Tue Apr 10 01:59:59 CEST 2018
IPC: H02P 25/22
B62D 5/04
B62D 6/00
H02P 27/06
H02P 29/028
H02P 29/68
B62D 101/00
B62D 119/00
Applicants: NIDEC CORPORATION
日本電産株式会社
Inventors: KADOWAKI Tsuyoshi
門脇 健
FUJIWARA Hiroki
藤原 広樹
Title: MOTOR DRIVE DEVICE, AND ELECTRIC POWER STEERING DEVICE
Abstract:
A motor drive device for driving a motor, wherein: the motor drive device has a control unit for outputting a drive signal instructing the amount by which a motor is to be driven, a drive unit including a plurality of inverter circuits for supplying to the motor a current supplied from the external power supply on the basis of the drive signal outputted from the control unit, and a first temperature detection unit for detecting the temperatures of each of the plurality of inverter circuits; and when a first temperature difference is equal to or greater than a prescribed difference value, the first temperature difference being obtained by subtracting, from one of the temperatures of the plurality of inverter circuits detected by the first temperature detection unit at a prescribed point in time, the temperature of another of the inverter circuits, the control unit outputs to the one inverter circuit a drive signal instructing a second driving amount that is less than a first driving amount for the prescribed point in time.