Rotary electromagnetic actuator

Details Rotary electromagnetic actuator Rotary electromagnetic actuator

1981-04-03

1982-08-24

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Oscillating

335272, H02K 3300

Patent

active

043463193

ABSTRACT:
A rotary electromagnetic actuator of swing type capable of generating sufficient torque in a wide swing range. The actuator comprises a stator having plural stator poles and a rotor having rotor poles as many as the stator poles. Each of the stator poles is provided with plural concave curved surfaces which have respectively different radii from the rotary center of the rotor and are arranged in order of size of radius to form stairs ascending in the forward rotation direction of the rotor. On the contrary each of the rotor poles is in form of stairs descending in the same direction. The pitch of the stairs of the stator is longer than that of the rotor so that each couple of edges of both stairs may sequentially approach owing to the magnetism therebetween to each other for rotating the rotor step by step.

REFERENCES:
patent: 2930945 (1960-03-01), Weathers et al.
patent: 3816779 (1974-06-01), Lundin
patent: 4164722 (1979-08-01), Garvey

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