Electric power steering apparatus

Details Electric power steering apparatus Electric power steering apparatus

1998-03-23

1999-04-13

Ro, Bentsu

Electricity: motive power systems

Constant motor current, load and/or torque control

Control of motor load or device driven

318489, 318632, 388930, B62D 504

Patent

active

058942068

ABSTRACT:
An electric power steering apparatus includes a control unit for controlling a motor drive circuit which drives an electric motor on the basis of a steering torque signal supplied from a steering torque sensor. The control unit includes a center value compensating circuit for compensating for the offset of a center value of the steering torque sensor, and a direction inhibiting circuit for inhibiting supply of a motor control signal to the motor drive circuit on the basis of the steering torque signal. The direction inhibiting circuit has a reference value changing section for changing operation reference values in left and right directions of the steering torque in response to the offset of the center value. The reference value changing section generates left and right operation reference values corresponding to a center value signal supplied from the center value compensating circuit.

REFERENCES:
patent: 4986380 (1991-01-01), Morishita
patent: 5600559 (1997-02-01), Nishimoto et al.
patent: 5652487 (1997-07-01), Nishino et al.
patent: 5698956 (1997-12-01), Nishino et al.

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