Pole changing switched reluctance motor and method

Details Pole changing switched reluctance motor and method Pole changing switched reluctance motor and method

1989-02-14

1990-07-17

Roskoski, Bernard

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02K 3700

Patent

active

049423452

ABSTRACT:
A switched reluctance motor has its stator poles divided into at least three phases, each phase having its own independently switchable phase windings wound around the corresponding stator poles. First switch elements control application of power to the windings of the first phase, second switch elements control application of power to the windings of the second phase, and third switch elements control application of power to the windings of the thirds phase. For low speed operation of the motor, the switch elements for each phase are controlled to apply power to its respective phase windings from a selected turn-on angle to a selected turn-off angle. The maximum difference in low speed operation between the turn-on angle and the turn-off angle for each phase is no greater than the angle subtended by adjacent stator poles as measured from the geometric center of the stator. For high speed operation, only the windings of the first phase are energized, and the difference between the turn-on angle and the turn-off angle for the first phase windings is greater than the angle subtended by adjacent stator poles.

REFERENCES:
patent: 3866104 (1911-02-01), Heine
patent: 3873897 (1975-03-01), Muller
patent: 4309643 (1982-01-01), Akamatsu
patent: 4540921 (1985-09-01), Boyd, Jr. et al.
patent: 4636936 (1987-01-01), Boyd, Jr. et al.
patent: 4642537 (1987-02-01), Young
patent: 4670696 (1987-06-01), Byrne et al.
patent: 4777419 (1988-10-01), Obradovic
patent: 4780652 (1988-10-01), Rilly

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