High efficiency voice coil motor

Details High efficiency voice coil motor High efficiency voice coil motor

2008-05-06

2008-05-06

Mullins, Burton (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Reciprocating

Reexamination Certificate

active

07368838

ABSTRACT:
Methods and apparatus for increasing the efficiency of a voice coil motor (VCM) are disclosed. According to one aspect of the present invention, a cylindrical and radially symmetric VCM includes a plurality of sets of magnets, and a single coil. The plurality of sets of the magnets are each arranged in an array configuration, and cooperate to form a magnetic field. The coil receives current and has a plurality of windings. A first space is defined within the coil, and the plurality of sets of the magnets are arranged such that a first set of the magnets is positioned within the first space and a second set of the magnets is positioned external to the coil.

REFERENCES:
patent: 3836801 (1974-09-01), Yamashita et al.
patent: 5349258 (1994-09-01), Leupold et al.
patent: 6104108 (2000-08-01), Hazelton et al.
patent: 6188147 (2001-02-01), Hazelton et al.
patent: 6531793 (2003-03-01), Frissen et al.
patent: 6713901 (2004-03-01), Hassan et al.
patent: 6720680 (2004-04-01), Tanaka
patent: 6841910 (2005-01-01), Gery
patent: 6936937 (2005-08-01), Tu et al.
patent: 7135792 (2006-11-01), Devaney et al.
patent: 2003/0192449 (2003-10-01), Fiske et al.
patent: 2003/0218391 (2003-11-01), Hirata
Leupold, Herbert A., “Approaches to Permanent Magnet Circuit Design”, IEEE Transactioins on Magnetics, vol. 29, No. 6, Nov. 1993, pp. 2341-2346.
Strat, Karl J. “Modern Permanent Magnets for Applications in Electro-Technology”, Proceedings of the IEEE, vol. 78, No. 6, Jun. 1990, pp. 923-946.
Zhu, Z.Q. et al., “Halbach Permanent Magnet Machines and Applications: A Review”, IEE Proc.-Electr. Power Appl. vol. 148, No. 4, Jul. 2001, pp. 299-308.

Affiliated with

Also associated with

Rating

High efficiency voice coil motor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High efficiency voice coil motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High efficiency voice coil motor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2780601