Search International and National Patent Collections

1. (WO2018203393) CONTROL DEVICE FOR MOTOR, AND ELECTRIC POWER STEERING SYSTEM

Pub. No.:    WO/2018/203393    International Application No.:    PCT/JP2017/017278
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Wed May 03 01:59:59 CEST 2017
IPC: H02P 6/16
H02P 27/06
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: TSUCHIMOTO, Yuya
土本 祐也
KEZOBO, Isao
家造坊 勲
NAKAJIMA, Shunsuke
中嶋 俊介
FURUKAWA, Akira
古川 晃
Title: CONTROL DEVICE FOR MOTOR, AND ELECTRIC POWER STEERING SYSTEM
Abstract:
A control device for a motor, comprising: a power converter 4 for performing ON/OFF control on an upper switching element and a lower switching element in accordance with a drive command from a current controller 3, and thereby supplying power to a motor 1; a current sensor 5 provided to the lower switching element; and a fault determining unit 6 for determining a fault in the current sensor 5. When the lower switching element for each phase is OFF, the current sensor 5 detects the current error in each phase. The fault determining unit 6 obtains a current error determination value on the basis of the value obtained by converting, to Cartesian coordinates, the current error for each phase or the magnitude of the sum of current error vectors for each phase in which the value for the current error for each phase is held as the magnitude, and determines a fault.