Axially asymmetric permanent magnet machine

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United States of America Patent

PATENT NO 8884485
SERIAL NO

13448508

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Abstract

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A permanent magnet machine is provided with a rotor positioned at least partially within a stator. The rotor includes first and second ring segments oriented axially around a central axis. The rotor defines first and second configurations in the first and second ring segments, respectively. The first configuration is sufficiently different from the second configuration such that torque ripple may be minimized. A first layer of slots, defining a slot outer edge, may be formed in the rotor. In one embodiment, a stator-to-slot gap varies between the first and second ring segments. In another embodiment, a stator-rotor gap varies between the first and second ring segments. In another embodiment, a bridge thickness varies between the first and second ring segments. Thus the rotor exhibits axial asymmetry.

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Patent Owner(s)

  • GM GLOBAL TECHNOLOGY OPERATIONS, INC.;GM GLOBAL TECHNOLOGY OPERATIONS LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Han, Xu Novi, US 126 972
Jurkovic, Sinisa Sterling Heights, US 23 247
Niu, Qiang Novi, US 16 75
Rahman, Khwaja M Troy, US 88 1238
Zhou, Xinyu Troy, US 35 137

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