Rotor for electric motor with slots for airflow
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United States of America Patent
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Jan 14, 2014
Grant Date -
Jul 21, 2011
app pub date -
Jan 14, 2011
filing date -
Jan 15, 2010
priority date (Note) -
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Abstract
A rotor of an electric motor has a carrier structure including a disc portion to which is centrally connected a shaft, and the periphery of which is joined to an essentially cylindrical annular skirt portion which in use extends coaxially around the stator. The disc portion has a plurality of slots between which there is defined a corresponding plurality of spokes. At least some of the spokes have, in a circumferential direction, a transverse cross-section shaped in a manner to induce, at least when the rotor rotates in one direction, an at least approximately axial air flow through corresponding slots.
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