Linear voice coil actuator with compensating coils

Details Linear voice coil actuator with compensating coils Linear voice coil actuator with compensating coils

2005-05-17

2005-05-17

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Linear

C310S031000, C310S027000

Reexamination Certificate

active

06894408

ABSTRACT:
An actuator is provided in which one or more separate compensating coils are employed to alter the distribution of the magnetic flux density in the air gap to produce a substantially constant force throughout the stroke; and in which current in the separate compensating coils can be adjusted with the stroke using separate power supplies and position feedback.

REFERENCES:
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patent: 4322584 (1982-03-01), Shimada et al.
patent: 4357490 (1982-11-01), Dickey
patent: 5177383 (1993-01-01), Sim
patent: 5521774 (1996-05-01), Parks et al.
patent: 5677963 (1997-10-01), Morcos et al.
patent: 5729617 (1998-03-01), Gruber
patent: 5777403 (1998-07-01), Yuan
patent: 1308349 (1973-02-01), None
patent: 224363 (1997-08-01), None
patent: 308325 (2000-11-01), None

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