Electric power steering apparatus

Details Electric power steering apparatus Electric power steering apparatus

1997-12-01

1999-04-13

Ip, Paul

Electricity: motive power systems

Constant motor current, load and/or torque control

318430, 364424051, 180446, B62D 504, B62D 600

Patent

active

058942050

ABSTRACT:
An electric power steering apparatus includes a controller for controlling power assist of an electric motor so as to reduce a manual steering force required of the driver. The controller includes two closed control loops, one operating on the basis of a steering torque and the other on the basis of a differential value of the steering torque. The second closed control loop includes a differential torque compensator for compensating for the differentiated steering torque in such a manner as to increase the proportion of an assist torque developed in accordance with the change of the steering torque while keeping a desired degree of stability of operation of the steering system.

REFERENCES:
patent: 5182711 (1993-01-01), Takahashi et al.
patent: 5425574 (1995-06-01), Sano
patent: 5467281 (1995-11-01), Iwashita et al.
patent: 5612877 (1997-03-01), Shimizu et al.

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