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US 9,793,767 B2Granted
Method and assembly for cooling an electric machine
AssigneeHamilton Sundstrand Corporation
InventorsMark Hamilton Severson, Debabrata Pal, Joseph Kenneth Coldwate
Life of this patent
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Abstract
In one exemplary embodiment, an electric machine includes a stator having a plurality of axial protrusions forming a plurality of stator cooling channels on a radially outer surface of the stator and a tapered portion located adjacent a distal end of at least one of the plurality of protrusions. Additionally, the disclosure includes a method for cooling the electric machine.
Claims14
An electric machine comprising:
- a stator including a plurality of axial protrusions forming a plurality of stator cooling channels on a radially outer surface of the stator;
- and
- a ring including a tapered portion located adjacent an axial inlet end of the stator forming an inlet to the plurality of stator cooling channels, wherein the tapered portion includes a decreasing cross-sectional area with a first cross-sectional area adjacent an outer axial end of the ring being larger than a second cross-sectional area spaced axially from the outer axial end of the ring.
A method of cooling an electric machine comprising:
- directing a cooling fluid through a stator cooling channel in a stator;
- and
- increasing a flow rate by tapering at least one of an inlet or an outlet to the stator cooling channel with a ring including a tapered portion located adjacent an axial end of the stator forming a passage in communication with the stator cooling channel, wherein the tapered portion includes a first cross-sectional area adjacent an axial outer end of the ring being larger than a second cross-sectional area spaced axially from the outer axial end of the ring.
Dependencies are inferred from the claim text.