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1. (WO2017037779) ELECTRIC POWER STEERING DEVICE

Pub. No.:    WO/2017/037779    International Application No.:    PCT/JP2015/074415
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Aug 29 01:59:59 CEST 2015
IPC: B62D 5/04
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: FURUKAWA Akira
古川 晃
MORI Akihiko
森 昭彦
Title: ELECTRIC POWER STEERING DEVICE
Abstract:
This electric power steering device is provided with an electric motor (2) for rotating a steering device of a vehicle, and a control unit (1) for controlling the electric motor (2). The electric motor (2) has a stator provided with two groups of independent coil windings, the control unit (1) has a CPU (3) for calculating and outputting control quantities, and a drive circuit (13) for driving each group of windings of the electric motor (2) individually. The CPU (3) detects a plurality of malfunctions and classifies malfunctions into at least two types of malfunction modes. After a first type of malfunction has been detected, the CPU (3) continues control in the normal manner, and when a second type or other type of malfunction occurs, the CPU (3) employs a set that includes past malfunctions and enables control closer to normal control, and continues control.