Reducing high frequency losses in an electric machine
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United States of America Patent
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May 29, 2018
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N/A
app pub date -
Jun 4, 2015
filing date -
Jun 4, 2015
priority date (Note) -
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Abstract
An electric machine has a stator defining an interior cavity and a rotor supported to rotate in the interior cavity of the stator. The rotor has a rotor core with a plurality of permanent magnets arranged around a perimeter of the rotor core. The magnets define a cylindrical, radially facing outer surface. An electrically conductive shield is provided on and covering the cylindrical outer surface of the permanent magnets. A containment sleeve resides around the rotor core, the permanent magnets and the shield and defines an exterior cylindrical surface of the rotor. The containment sleeve is configured to retain the magnets to the rotor core during operation of the electric machine.
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