Device comprising an actuator, method for use in the device, and

Details Device comprising an actuator, method for use in the device, and Device comprising an actuator, method for use in the device, and

1989-11-28

1991-09-03

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Oscillating

310 36, 318132, H02K 3312

Patent

active

050457357

ABSTRACT:
A system is disclosed which comprises an electrical actuator (2), a current source (35), a actuating unit (37) having a limited operating range, and a control unit (41). The actuator comprises a first actuator body having two diametrially opposed magnetic poles, and a soft-magnetic second actuator body, which is coaxial with the first actuator body and which preferably comprises three circumferentially equi-spaced teeth, which each carry an energizing coil (29, 30, 31). The first actuator body and the second actuator body cooperate with one another via an air gap and are pivotable relative to each other through a specific angle about a pivotable axis. The control unit is constructed to divide the operating range of the actuating unit into a plurality of sub-ranges and, depending on said sub-ranges, to controllably feed a current through one of the energizing coils, through two of the energizing coils, and through all the energizing coils, respectively.

REFERENCES:
patent: 3959672 (1976-05-01), Walker et al.
patent: 4447793 (1984-05-01), Gray

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