Electricity: motive power systems – Motor structure adjustment or control – Brush or other current-collector control
Patent
1997-07-16
1999-03-30
Ro, Bentsu
Electricity: motive power systems
Motor structure adjustment or control
Brush or other current-collector control
318538, 318293, 3889072, 3889075, B62D 504
Patent
active
058893784
ABSTRACT:
A motor-assisted power steering apparatus includes a DC motor which is fixed to a heat conductive frame, a torque sensor for detecting steering torque and a control circuit for controlling current supplied to the motor. The control circuit includes a first unit disposed in a space defined by the frame and a commutator of the motor and a second unit disposed outside the motor. The first unit includes multiple switching elements connected to the motor, and the second unit includes a microprocessor for setting motor current, a current detecting unit for detecting current supplied to the motor, a current control unit for providing duty ratio signals and a gate driving circuit for driving the switching elements according to the duty ratio signals.
REFERENCES:
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patent: 5119466 (1992-06-01), Suzuki
patent: 5184050 (1993-02-01), Harada et al.
patent: 5245258 (1993-09-01), Becker et al.
patent: 5341074 (1994-08-01), Zorzolo
patent: 5479077 (1995-12-01), Kline et al.
Motor For Motor-Assisted Power Steering Device, Journal Of Nippondenso Technical Disclosure Nos. 105-015, 105-016 Publication Date: Nov. 15, 1995 (both).
Denso Corporation
Ro Bentsu
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