Electric motor/generator and method of cooling an electromechanical transmission
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United States of America Patent
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Mar 24, 2009
Grant Date -
Sep 22, 2005
app pub date -
Feb 17, 2005
filing date -
Mar 22, 2004
priority date (Note) -
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Abstract
An electromechanical transmission includes a rotor supported by a rotor hub that has at least one passage formed therein for providing cooling fluid flow to the rotor. Preferably, cooling fluid is provided to the passage through an orifice to control flow rate. An inner diameter of the rotor is supported by the rotor hub and fluid is pooled by the rotor hub opposite the rotor inner diameter for cooling thereof. Preferably, fluid is thrown by centrifugal force from the rotor hub onto rotor ends and then onto an inner diameter side of stator windings of a stator surrounding the rotor. A method of cooling an electromechanical transmission is also provided.
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