Self-commutating, back-EMF sensing, brushless DC motor controlle

Details Self-commutating, back-EMF sensing, brushless DC motor controlle Self-commutating, back-EMF sensing, brushless DC motor controlle

1992-12-03

1995-01-17

Ip, Paul

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02P 602

Patent

active

053828895

ABSTRACT:
A method and apparatus to commutate the drive voltages of a brushless DC motor. The present invention determines rotor position and velocity by detecting the polarity reversal of the Back-EMF of an undriven leg when compared to a transformed pseudo-reference. In an extra measure of efficiency, the present invention is independent of hardware sensors; it includes a commutation delay timing circuit for optimization of motor operation, and it minimizes the participation of a microprocessor or other microcontroller.

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