SYSTEM AND METHOD FOR REDUCING COGGING TORQUE IN AN INTERIOR PERMANENT MAGNET MOTOR
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United States of America Patent
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Issued Date -
Dec 5, 2013
app pub date -
May 30, 2012
filing date -
May 30, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An interior permanent magnet motor comprises a rotor assembly disposed within a stator assembly. The rotor assembly is configured for rotating about a central axis relatively to the stator assembly. The rotor assembly defines a plurality of magnet pockets within the rotor assembly along a radially outboard surface of the rotor assembly. Each magnet pocket is substantially rectangular in cross-sectional shape and is configured to facilitate insertion of a permanent magnet into, and retention of the permanent magnet within, the magnet pocket. The rotor assembly further defines at least one rotor notch disposed between each magnet pocket and the radially outboard surface.
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