Linear motor with reduced cogging

Details Linear motor with reduced cogging Linear motor with reduced cogging

2006-12-20

2010-11-02

Le, Dang D (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Linear

C310S012240

Reexamination Certificate

active

07825549

ABSTRACT:
A linear motor is provided including a magnet track including a plurality of permanent magnets, and a coil assembly including a plurality of laminations. The coil assembly defines a plurality of teeth having slots therebetween. The plurality of teeth include (1) two end teeth and (2) at least one non-end tooth arranged between the two end teeth. Each of the two end teeth defines an end profile including a first surface and a second surface. The first surface and the second surface are separated by a step which is substantially perpendicular to a plane defined by the plurality of magnets. The linear motor also includes a plurality of coils at least partially disposed in at least a portion of the slots defined by the plurality of teeth.

REFERENCES:
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patent: 5642013 (1997-06-01), Wavre
patent: 5909066 (1999-06-01), Nanba et al.
patent: 5910691 (1999-06-01), Wavre
patent: 6949846 (2005-09-01), Sugita et al.
patent: 2003 299342 (2003-10-01), None
International Search Report and Written Opinion for International Application No. PCT/US2006/062351 dated Aug. 31, 2007.

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