Cooling arrangement for end turns and stator in an electric machine
First Claim
1. An electric machine comprising:
- a stator having an outer circumference;
spaced apart first walls arranged about the outer circumference providing generally parallel axially extending first channels, and a second wall adjoining the first walls and arranged about the outer circumference providing discrete, arcuate second channels in fluid communication with the first channels and providing a tortuous serpentine fluid flow path about the circumference that is configured to alternate between opposite axial fluid flow directions within the first channels, the first and second channels having an inner surface; and
a structure provided within at least one of the first and second channels and having an outer surface spaced radially outward from the inner surface to provide a flow passage and at least partially defining the tortuous fluid flow path between the outer and inner surfaces, wherein the structure is provided by a fin core including rows of corrugations, the corrugations include spaced apart legs and the outer surface, which is supported by the legs, the flow passage is defined by the inner and outer surfaces and the spaced apart legs.
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Accused Products
Abstract
An electric machine includes a stator having an outer circumference. Spaced apart first walls are arranged about the outer circumference and provide generally parallel first channels. A second wall adjoins the first wall and is arranged about the outer circumference providing a second channel in fluid communication with the first channels, thus, providing a tortuous fluid flow path about the circumference. The first and second channels have an inner surface. A structure is provided within at least one of the first and second channels. The structure has an outer surface spaced radially outward from the inner surface and at least partially defines the tortuous flow path between the outer and inner surfaces. The stator includes an end turn. An end cap extends axially and radially outward from the stator and provides an enclosure about the end turn in fluid communication with the exit associated with the flow path.
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Citations
11 Claims
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1. An electric machine comprising:
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a stator having an outer circumference; spaced apart first walls arranged about the outer circumference providing generally parallel axially extending first channels, and a second wall adjoining the first walls and arranged about the outer circumference providing discrete, arcuate second channels in fluid communication with the first channels and providing a tortuous serpentine fluid flow path about the circumference that is configured to alternate between opposite axial fluid flow directions within the first channels, the first and second channels having an inner surface; and a structure provided within at least one of the first and second channels and having an outer surface spaced radially outward from the inner surface to provide a flow passage and at least partially defining the tortuous fluid flow path between the outer and inner surfaces, wherein the structure is provided by a fin core including rows of corrugations, the corrugations include spaced apart legs and the outer surface, which is supported by the legs, the flow passage is defined by the inner and outer surfaces and the spaced apart legs. - View Dependent Claims (2, 3, 6, 7, 8, 9, 10, 11)
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4. An electric machine comprising:
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a stator having an outer circumference; spaced apart first walls arranged about the outer circumference providing generally parallel axially extending first channels, and a second wall adjoining the first walls and arranged about the outer circumference providing discrete, arcuate second channels in fluid communication with the first channels and providing a tortuous serpentine fluid flow path about the circumference that is configured to alternate between opposite axial fluid flow directions within the first channels, the first and second channels having an inner surface; a structure provided within at least one of the first and second channels and having an outer surface spaced radially outward from the inner surface to provide a flow passage and at least partially defining the tortuous fluid flow path between the outer and inner surfaces; and wherein the first walls extend in a generally axial direction and are circumferentially spaced about the outer circumference, and the second wall is generally annular and arranged transverse from the first walls, the fluid configured to flow from one first channel through one second channel to another first channel that is adjacent the one first channel to provide the tortuous serpentine fluid flow path, wherein the tortuous fluid flow path provides at least two sections with a second channel provided generally centrally about the outer circumference. - View Dependent Claims (5)
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Specification