Brushless motor

Details Brushless motor Brushless motor

1982-09-30

1984-06-19

Dobeck, B.

Electricity: motive power systems

Switched reluctance motor commutation control

310156, 310268, H02P 506

Patent

active

044555164

ABSTRACT:
A brushless D.C. motor which can provide a speed detection signal or position detection signal continuously even when the speed of rotation of the rotor is reduced includes a ring-shaped driving magnet magnetized to develop N and S poles alternatively; a rotary yoke having a plurality of flanges extending from the outer peripheral edge thereof toward a stationary yoke substantially to the middle of the outer peripheral end surface of the driving magnet in such a manner as to embrace the driving magnet, the flanges extending over two adjacent magnetic poles of different polarities at the boundary between these magnetic poles; and a magnetic-electric transducer element disposed at a position spaced from and opposing to the path of rotation of the flange surfaces adjacent to the stationary yoke and spaced from and opposing to the path of rotation of the outer peripheral end surface of the driving magnet.

REFERENCES:
patent: 3646376 (1972-02-01), Anderson
patent: 4164690 (1979-08-01), Muller
patent: 4211963 (1980-08-01), Muller
patent: 4260920 (1981-04-01), Nakamura
patent: 4371817 (1983-02-01), Muller

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