Method and apparatus for driving a brushless motor

Details Method and apparatus for driving a brushless motor Method and apparatus for driving a brushless motor

1988-10-04

1990-05-01

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318431, H02K 2900, H02P 118

Patent

active

049221698

ABSTRACT:
An n-phase, m-pole (wherein n and m are integers) brushless motor is driven without use of physical rotary position detectors, such as Hall elements or the like. An harmonic component of back emf induced in the phases of the motor is detected and used to generate phase energizing signals (such as in response to zero crossings of the detected harmonic component) which, in turn, energize selected phases of the motor. Drive current is supplied to those phases which are energized by the phase energizing signal in predetermined sequence.

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Ferraris et al., "P.M. Brushless Motor Drives: A Self-Commutating System Without Rotor-Position Sensors", 9th Symposium on IMCS&D, 1980, pp. 305-312.
Jufer et al., "Electrical Drive Control of an Artificial Heart", Swiss Federal Institute of Technology, pp. 65-70.

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