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US 2013/0093273 A1Published application
Rotary electric machine
AssigneeMitsubishi Electric Corporation
InventorsTadashi MURAKAMI, Kouichi OJIMA, Masaya INOUE
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Abstract
A rotary electric machine includes a rotor, a stator having coils wound to surround the rotor, a cylindrical ring member fixedly mounted on the stator by shrinkage fitting, and a frame disposed on the outside of the ring member with a gap created in between. The distance of the gap varies as a result of thermal expansion of the stator and the ring member. An outer surface of the ring member goes into contact with the frame when the stator and the ring member thermally expand, whereby the stator and the ring member are efficiently cooled.
Claims10
A rotary electric machine comprising:
- a rotor mounted rotatably about a rotary shaft;
- a stator having a coil wound to surround said rotor;
- and
- a frame disposed on the outside of said stator with a gap created in between;
- wherein said gap has a distance which can vary as a result of thermal expansion of said stator caused by a temperature change, and an outer surface of said stator goes into contact with said frame and said stator is cooled when said stator thermally expands.
2 more elements
Dependencies are inferred from the claim text.