Multi-Piece Stator For An Electric Motor
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United States of America Patent
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Issued Date -
Nov 20, 2014
app pub date -
Nov 21, 2013
filing date -
May 16, 2013
priority date (Note) -
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Abstract
A multi-piece stator includes a pole cluster, a flux ring, and an insulation member. A rotor cavity is located at a center of the pole cluster, and multiple flux poles extend radially outward from the rotor cavity in a circumferential arrangement. The pole cluster includes a flux impedance feature between each of the multiple flux poles, and multiple bridge features maintaining the arrangement of the flux poles. The flux ring includes a ring wall having a minimum wall thickness and a pole cluster cavity defined by the ring wall. The insulation member has a shape corresponding substantially to a shape of the pole cluster and is located to effectively cover an outside surface of the flux poles. The pole cluster, the insulation member, and a field generation coil wrapped around a portion of the insulation member and a portion of the pole cluster are inserted into the pole cluster cavity.
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