Electric motor control with malfunction detection

Details Electric motor control with malfunction detection Electric motor control with malfunction detection

1993-09-14

1995-11-21

Wysocki, Jonathan

Electricity: motive power systems

Limitation of motor load, current, torque or force

361 23, 318254, 318603, H02P 500

Patent

active

054690323

ABSTRACT:
A motor for an electromobile includes a rotor having permanent magnets and a stator coil for generating an output torque when fed with a motor current. A rotor position detector or resolver is connected to the spindle of the rotor for detecting the magnetic position of the rotor in terms of a voltage waveform and a motor controller controls the output current to the motor on the basis of the magnetic position signal coming from the rotor position detector. A first malfunction detecting circuit detects any malfunction of the rotor position detector in response to an abnormal voltage waveform coming from the rotor position detector. A second disconnection detecting circuit detects a disconnection of the motor controller from the invertor which develops drive current for the motor. A control unit outputs a signal to the motor controller for stopping the motor in response to a signal from either the first malfunction detecting circuit or the second disconnection detecting circuit.

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patent: 5316263 (1994-05-01), Mino

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