Self-starting brushless D.C. motor

Details Self-starting brushless D.C. motor Self-starting brushless D.C. motor

1985-10-10

1989-03-21

Dobeck, Benjamin

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02K 2900

Patent

active

048146765

ABSTRACT:
A brushless DC motor is self-starting using only one magneto-sensitive element because the motor is of a two-phase type and is provided with a detection device which detects towards which of the two phases the rotor is mainly directed. A presetting circuit compares the detected rotor position with the state of an energizing circuit in order to set this circuit so that the energizing circuit energizes the stator phases for said specific rotor position in such a way that starting of the motor is guaranteed, although initially with an undefined direction of rotation. By presetting the commutating direction of the energizing circuit the rotor subsequently locks onto the field and rotates in the correct direction if it has started in the incorrect direction.

REFERENCES:
patent: 3663877 (1972-05-01), Clark
patent: 3760392 (1973-09-01), Stich
patent: 3946292 (1976-03-01), Tanikoshi
patent: 4047084 (1977-09-01), Ban
patent: 4065706 (1977-12-01), Gosling
patent: 4167691 (1979-09-01), Sorenson
patent: 4302692 (1981-11-01), Matsumoto

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