End ring support structure for electric motor
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United States of America Patent
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N/A
Issued Date -
Jan 27, 2005
app pub date -
Jul 23, 2003
filing date -
Jul 23, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A support sleeve press-fitted onto an end ring of a rotor applies a compressive pre-load stress on the end ring to counteract centrifugal stresses generated during rotor operation. In one embodiment, the support sleeve is made of a high-strength material having a thermal growth coefficient that is substantially the same as the thermal growth coefficient of the end ring material to minimize centrifugal and thermal stress in the end ring.
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