Permanent magnet machines with stator pole sections having different magnetic materials
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United States of America Patent
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May 3, 2011
Grant Date -
Sep 23, 2010
app pub date -
Mar 18, 2009
filing date -
Mar 18, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A permanent magnet machine includes a rotor and a stator including plurality of stator pole sections. Each stator pole section comprises a core section having an inner end piece disposed adjacent to the core section, the inner end piece comprising a first magnetic material that is adapted to saturate during exposure to a first magnetic field strength, and an outer end piece disposed adjacent to the core section radially outwardly relative to the inner end piece, the outer end piece comprising a second magnetic material that is adapted to be unsaturated during exposure to the first magnetic field strength and to saturate during exposure to a second magnetic field strength, wherein the second magnetic field strength is greater than the first magnetic field strength.
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