Control circuit for a multi-phase load

Details Control circuit for a multi-phase load Control circuit for a multi-phase load

1981-01-02

1982-09-07

Dobeck, B.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02K 2902

Patent

active

043486215

ABSTRACT:
The invention relates to a control circuit for a brushless type DC motor of the type having a permanent magnet rotor and a pair of poles provided with two windings, the windings having a common junction which is connectable to the positive terminal of a DC voltage source. A pair of controllable switching elements are in respective series with the windings. A symmetrical square wave pulse generator responsive to the angular position of the rotor switches the switching elements on and off in a push-pull mode. The control circuit processes the square wave output and has dual outputs for driving the switching elements with the dual outputs having alternate pulses in time spaced relation to each other for driving the switching elements in underlapping relation to each other to prevent the elements from drawing current from the common junction at the same time.

REFERENCES:
patent: 3924167 (1975-12-01), Clark
patent: 3931562 (1976-01-01), Visscher
patent: 3940670 (1976-02-01), Tanikoshi

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