High field voice coil motor

Details High field voice coil motor High field voice coil motor

2006-11-14

2006-11-14

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Linear

Reexamination Certificate

active

07135792

ABSTRACT:
An embodiment of the invention is a particular arrangement of permanent magnets that generates a higher strength and more uniform magnetic field than existing permanent magnet arrangements for a voice coil motor. The permanent magnet arrangement of an embodiment is based on the Halbach arrangement of permanent magnets. The increased magnetic field strength and uniformity allows for a voice coil motor that is both capable of higher frequency actuations as well as more uniform force over the full stroke of the actuation.

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patent: 2003/0192449 (2003-10-01), Fiske et al.
patent: 2004/0207269 (2004-10-01), Hol et al.
patent: 2005/0077786 (2005-04-01), De Weerdt
patent: 2003116260 (2003-04-01), None

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