Surface groove patterns for permanent magnet machine rotors
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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 9, 2015
filing date -
Jun 9, 2015
priority date (Note) -
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Abstract
A permanent magnet electric machine includes a rotor configured to rotate about an axis. The rotor is comprised of axially stacked sections. Each section is comprised of axially stacked laminations that define a pattern of axial grooves on an outer surface of the rotor to reduce torque ripple. The pattern is different for at least two of the sections. The pattern for each section may alternate with respect to poles of the rotor.
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