Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1983-06-09
1985-02-12
Truhe, J. V.
Electricity: motive power systems
Switched reluctance motor commutation control
318138, 318439, H02P 602
Patent
active
044994087
ABSTRACT:
The invention discloses a control circuit for an electronically commutated motor which performs essential internal commutation and control functions and responds to external controls, usually user operated. The invention is embodied in a ceiling fan which is subject to controls over motor speed or torque and direction of rotation. The control circuit uses a differential transconductance amplifier, which is periodically balanced, for commutation timing, and control logic, which includes a bidirectional counter, designed for uniformity in count duration, irrespective of the count, direction of counting, or changes in direction of counting, and a five rank decoding structure which selects the unenergized winding stage for sensing, selects the energized winding stages for suitably sensed energization, and responds to both direction and energy controls. The internal control includes circuit protection when power is first turned on.
The invention also includes an integrated circuit having the foregoing features and a novel method of operating an electronically commutated motor.
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Bitting Ricky F.
Brown Thomas A.
Guzek William K.
Peil William
General Electric Company
Krisher, Jr. Ralph E.
Ro Bentsu
Truhe J. V.
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