Synchronous drive for brushless DC motor

Details Synchronous drive for brushless DC motor Synchronous drive for brushless DC motor

1981-12-02

1984-06-12

Smith, Jr., David

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, 318685, H02K 2900

Patent

active

044544588

ABSTRACT:
Method and apparatus for starting and driving a brushless DC motor and compensating variations in motor speed by producing sequential drive currents through the motor coils, selectively interrupting such currents to allow the rotor to catch up with the rotating stator field during startup, and stabilizing motor speed by controlling motor coil current in inverse proportion to the rate of change of phase lag of the rotor behind the rotating stator field.

REFERENCES:
patent: 3924721 (1975-12-01), Reynolds
patent: 4072888 (1978-02-01), Bechtle et al.
patent: 4140956 (1979-02-01), Pritchard
patent: 4215302 (1980-07-01), Chiang
patent: 4262239 (1981-04-01), Kawa
patent: 4270074 (1981-05-01), Duckworth et al.
patent: 4328452 (1982-05-01), Ragen et al.

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