Electric power steering device

Details Electric power steering device Electric power steering device

2007-01-02

2007-01-02

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Constant motor current, load and/or torque control

C318S434000, C318S599000

Reexamination Certificate

active

11339653

ABSTRACT:
An electric power steering device comprising a control unit capable of distinguishing a failure of a motor current detection device caused by a change in power voltage, an oxide film formed on the commutator of a motor or the contact point of a relay, etc. from a failure of the motor current detection device itself and judging a failure of the motor current detection device accurately. A motor current is sampled during which a predetermined constant voltage is supplied to the motor, and the detected motor current value is compared with a motor current estimated value to judge the failure of the motor current detection device.

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