Laminated rotor core for mounting permanent ring magnets

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5731648
SERIAL NO

08552340

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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One aspect of the invention is a rotor core for use with a permanent ring magnet in an electric motor which serves to minimize and evenly distribute thermal stresses in the rotor without undermining the efficiency of the motor by distorting the flux return to the ring magnet. According to one embodiment, the rotor core comprises a plurality of laminated plates. Each of the plates has a rim with a circular outer perimeter, a hub concentric with the outer perimeter of the rim, and first and second sets of curved spokes coupling the hub to the rim. Each spoke of the first set of curved spokes is concave in a clockwise direction and each spoke of the second set of curved spokes is concave in a counter-clockwise direction. According to another embodiment, the rotor core comprises a plurality of laminated structurally-identical perforated plates having obverse and reverse sides such that the obverse side of each plate faces the obverse side of an adjacent plate. In an especially preferred form, the plates include a plurality of arcuate perforations symmetrically distributed about a central axis of the rotor core. Adjacent arcuate perforations define arcuate spokes which support the magnet ring.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
GLOBE MOTORS INC2275 STANLEY AVENUE DAYTON OH 45404

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Batten, L Jay Lebanon, OH 2 57
Gaughan, Brian F Yellow Springs, OH 1 1

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