Electric rotary machine
AssigneeHitachi, Ltd.
InventorsToshiaki Ueda, Takeshi Sakai, Susumu Terumoto, Toshinori Watanabe
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Abstract
In the stator of a electric rotary machine in which heat conductive insulation resin is filled at the end portions of a stator coil, the material of a stator core, the stator coil, the heat conductive insulation resin and a frame is selected such that a linear thermal expansion coefficient α1 of the stator core, a linear thermal expansion coefficient α2 of the stator coil, a linear thermal expansion coefficient α3 of the heat conductive insulation resin being filled and a linear thermal expansion coefficient α4 of the frame satisfy a relation that α1<α2<α4≦α3. A cooling medium path is integrally formed within the frame made from aluminum through die casting molding.
Claims12
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An electric rotary machine comprising:
- a stator;
- and
- an electric rotary machine frame formed by an inner side frame and an outer side cylindrical frame, wherein the inner side frame is formed in a bowl shape in a manner that one side thereof is opened and the other side thereof has a bottom portion and a stator is fixed to an inner periphery thereof, the outer side cylindrical frame forms an outer frame of the electric rotary machine, the inner side frame and the outer side cylindrical frame are constituted as an integrally molded component which are coupled at portions in opposite to the bottom portions thereof, and a cavity is formed between the inner side frame and the outer side cylindrical frame.
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Dependencies are inferred from the claim text.