Electric machine having reduced torque oscillations and axial thrust
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United States of America Patent
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Feb 27, 2018
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N/A
app pub date -
Jun 24, 2014
filing date -
Sep 6, 2013
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Abstract
A component that includes a longitudinal axle, having a multiple keybars that extend outward from a surface of the axle, such that each of the keybars are disposed axially along and circumferentially around the axle. Also the axis of the keybars is parallel to the axle, such that a profile of all midpoints of the keybars is helicoidal around the axle, also the helicoidal profile is such that they make up one or more helicoidal paths. The profile may be herringbone skewed. The component may be part of a rotor assembly that is part of an electric machine such as an interior permanent magnet (IPM) or Synchronous Reluctance motor.
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