Electromagnetic motor/actuator

Details Electromagnetic motor/actuator Electromagnetic motor/actuator

1988-10-11

1989-08-22

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

310 12, 310 14, H01F 708

Patent

active

048599743

ABSTRACT:
An electromagnetic actuator includes a moving element comprising a plurality of permanent magnets oriented in alternating magnetic pole position so as to present a sequence of alternating north-south magnetic poles. The magnets can be angularly oriented within a magnetic structure serving to concentrate magnetic flux and focus such flux at the surface of the structure. Alternatively, the magnets are surface mounted within a structure of non-magnetic material. The actuator includes opposed electro-magnetic stators between which the moving element is positioned.

REFERENCES:
patent: 3891874 (1975-06-01), Roters
patent: 4037122 (1977-07-01), Bonner et al.
patent: 4220899 (1980-09-01), Heide
E. R. Laithwaite; Induction Machines for Special Purposes; 1966; pp. 154-157, Chemical Publishing Co., Inc., New York.
D. Matt et al., "Longitudinal Linear Reluctance Actuator", Electric Machines and Power Systems, 13, pp. 299-313, 1987.

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