Two-pulse brushless d.c. motor

Details Two-pulse brushless d.c. motor Two-pulse brushless d.c. motor

1980-11-25

1983-03-08

Truhe, J. V.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02K 2902

Patent

active

043762611

ABSTRACT:
In response to a Hall-IC sensor exposed to the magnetic field of the rotor of a brushless d.c. motor, two interleaved sequences of pulses are generated at separate outputs with an interpulse pause of a certain length occurring between successive interleaved pulses to prevent reduction of efficiency and increase of motor noise that would result from overlapping pulses being supplied to the stator of the motor. When these pulses are utilized to switch a semiconductor full bridge circuit, through which a single winding of the stator is energized by current pulses alternating in direction, prevention of short-circuits resulting from slow turn-off of the semiconductor switches is prevented. For overcurrent protection, only half of the bridge is intermittently blocked by a current regulator when the current reaches a predetermined limiting value, this provision also reducing generation of noise and interference by the motor.

REFERENCES:
patent: 4030005 (1977-06-01), Doemen
patent: 4070606 (1978-01-01), Morozumi et al.
patent: 4230976 (1980-10-01), Muller
Manera, A. S., Solid State Electronic Circuits: for Engineering Technology, McGraw-Hill Book Company, N.Y., 1973, pp. 693-700.

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