Linear actuator

Details Linear actuator Linear actuator

1976-04-02

1978-02-21

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Linear

360106, H02K 3300

Patent

active

040755177

ABSTRACT:
An electromagnetic actuator is disclosed having a magnetic circuit which provides a plurality of annular, concentrically located air gaps and a plurality of annular actuator forms which are positioned in the air gaps. A winding is mounted on each of the forms and each winding is adapted when electrically energized to establish a field which reacts with a field of the magnetic circuit and causes rectilinear motion of the form in an axial direction. A single magnetic circuit is thereby provided for a plurality of actuating forms and advantageously reduces the iron requirements of the actuator.

REFERENCES:
patent: 3430120 (1969-02-01), Kotaka et al.
patent: 3924146 (1975-12-01), George
"Balanced Force Voice-Coil Actuator", IBM Tech Disclosure Bulletin, vol. 15, No. 3, 8/72, p. 749.

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