Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1994-07-28
1996-09-03
Martin, David S.
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
180404, 180446, 318432, 361 33, H02P 100
Patent
active
055526845
ABSTRACT:
A motor-driven power steering control system of a motor vehicle for assisting a driver in manipulating a steering wheel by making use of an assist torque generated by a reversible motor which is operatively coupled to a steering mechanism of the motor vehicle includes an electric reversible motor mechanically coupled to a steering system of the motor vehicle through an electromagnetic clutch, a motor drive circuit, an H-bridge switching driver circuit for driving the electric reversible motor in forward or reverse direction under the control of the motor drive circuit, and a clutch control circuit for controlling the electromagnetic clutch. A motor voltage detection circuit for detecting terminal voltages at both terminals of the electric reversible motor is provided for generating a voltage signal of high level and subsequently a fail-safe signal of a low level on the basis of the high-level voltage signal when both of the terminal voltages are approximately zero, while generating a voltage signal of a low level and subsequently a fail-safe signal of high level on the basis of the low-level voltage signal unless both of the terminal voltages are approximately zero. A switch is connected between an electric power source and the switching drive circuit and the clutch control circuit. A microcomputer fetches the fail-safe signal from the motor voltage detection circuit to thereby open the switch for interrupting the power supply to the reversible motor and the clutch control circuit when the fail-safe signal is at the low level.
REFERENCES:
patent: 4532567 (1985-07-01), Kode
patent: 4611682 (1986-09-01), Yasuda et al.
patent: 4765426 (1988-08-01), Shimiza
patent: 4869333 (1989-09-01), Morishita et al.
patent: 4918744 (1990-04-01), Shimizu
patent: 4972133 (1990-11-01), Hirota et al.
Takagi Masanori
Wada Shunichi
Martin David S.
Mitsubishi Denki & Kabushiki Kaisha
LandOfFree
Control apparatus for reversible motor and motor-driven power st does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control apparatus for reversible motor and motor-driven power st, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control apparatus for reversible motor and motor-driven power st will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1952642