Brushless DC motor controller

Details Brushless DC motor controller Brushless DC motor controller

1984-07-20

1985-10-01

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, 318811, H02P 602

Patent

active

045448680

ABSTRACT:
The voltage supplied to the stator windings of a brushless DC motor is pulse-width-modulated by a circuit which interrupts the energization thereof for a predetermined period of time whenever the DC line current supplied thereto exceeds a current reference. The frequency and off/on duty cycle of the applied voltage is relatively high near zero speed to produce smooth motor starting torque and decreases with increasing motor speed. The pulse-width-modulation effects regenerative braking whenever the stator winding energization sequence is changed to reverse the direction of motor rotation.

REFERENCES:
patent: 4107593 (1978-08-01), Anderson
patent: 4250435 (1981-02-01), Alley et al.
patent: 4270074 (1981-05-01), Duckworth et al.
patent: 4368411 (1983-01-01), Kidd
patent: 4429262 (1984-01-01), Utenick
patent: 4463291 (1984-07-01), Usry
patent: 4490661 (1984-12-01), Brown et al.
patent: 4494051 (1985-01-01), Bailey

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