Power steering motor control unit with driving mode correction

Details Power steering motor control unit with driving mode correction Power steering motor control unit with driving mode correction

1995-12-29

1998-07-28

Nguyen, Tan Q.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle subsystem or accessory control

701 42, 701 43, 180446, 180443, 388811, 388819, B62D 504

Patent

active

057873763

ABSTRACT:
A power steering motor control unit for driving a motor in a PWM mode with feedback motor current control reduces fluctuations in the output torque of the motor caused by switching among a plurality of motor driving modes or a change in the duty value of the PWM signal. The control unit as a switching device driving circuit for driving the motor in the PWM mode and a plurality of motor driving modes for the driving control system of a motor, Q/D switching circuitry 14 for switching the motor driving mode, and detected current correcting circuitry 16 for correcting at least one input signal of an input signal comparing circuit provided in a feedback control loop in accordance with the motor driving mode. When the motor driving mode is switched, the correction value given by the detected current correcting circuitry is changed.

REFERENCES:
patent: 4896735 (1990-01-01), Morishita et al.
patent: 4972133 (1990-11-01), Hirota et al.
patent: 5150021 (1992-09-01), Kamono et al.
patent: 5201818 (1993-04-01), Nishimoto
patent: 5404960 (1995-04-01), Wada et al.
patent: 5530788 (1996-06-01), Saijima
patent: 5569991 (1996-10-01), Matsuoka et al.
patent: 5574344 (1996-11-01), Matsuoka et al.
patent: 5631529 (1997-05-01), Shimizu et al.
Patent Abstracts of Japan, vol. 94, No. 010, Omron corp. Oct. 18, 1994 (JP6292389).

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