Rotary electrical machine cooling apparatus
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United States of America Patent
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Feb 27, 2018
Issued Date -
N/A
app pub date -
Apr 1, 2015
filing date -
Apr 11, 2014
priority date (Note) -
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Abstract
A rotary electrical machine cooling apparatus includes: a rotary electrical machine including a stator having an annular resin portion which covers a coil end, and a rotor; and a cooling portion that injects a coolant from an upper side to the annular resin portion. The annular resin portion includes: an annular main body portion, and a plurality of island portions that protrude in the axial direction from a plurality of positions in a circumferential direction of an axially outer end face of the annular main body portion. The plurality of island portions include a plurality of first island portions having first maximum circumferential lengths and a second island portion that has a second maximum circumferential length L2 and the coolant impinges on the outer circumferential face to flow in a circumferential direction. Thus, the coolability of the coil can be improved.
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