Apparatus and method for dissipating heat from a motor
First Claim
1. An arrangement for dissipation of heat from an electric motor having a shaft, a housing and a stator mounted in the housing, the stator having opposite ends, comprising:
- the housing extending across one of the ends of the stator toward the shaft, said one end of the stator being encapsulated in a mass of material; and
a resilient pad extending between and contacting the housing and said mass of material, wherein said mass and said resilient pad are made of heat conductive materials.
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Abstract
Heat-conductive masses of material encapsulate end turns of a stator fixed in a housing of a motor to dissipate heat from the stator through the side and one end of the housing. In one embodiment, a resilient heat-conductive pad is interposed between a front plate of the housing and a side of one of the heat-conductive masses of material facing the front plate. The pad has a thickness greater than the manufacturing tolerances associated with assembling an end of the stator at an end of the housing adjacent to the front plate. In another embodiment, the heat-conductive mass of material adjacent to the front plate extends into contact with the front plate. The contact can be assured, even without the presence of a resilient pad, by forming the heat-conductive mass between the stator and the front plate after the stator is assembled to the housing.
113 Citations
11 Claims
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1. An arrangement for dissipation of heat from an electric motor having a shaft, a housing and a stator mounted in the housing, the stator having opposite ends, comprising:
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the housing extending across one of the ends of the stator toward the shaft, said one end of the stator being encapsulated in a mass of material; and
a resilient pad extending between and contacting the housing and said mass of material, wherein said mass and said resilient pad are made of heat conductive materials. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of making an electric motor having a shaft, a housing and a stator mounted in the housing, the stator having opposite ends, comprising:
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providing the housing that extends toward the shaft;
positioning a resilient pad made of a heat conducting material in heat transferring contact with said housing;
encapsulating one of the ends of the stator in a mass of heat conducting material; and
securing the stator in the housing, with the mass of heat conducting material in heat transferring contact with said resilient pad in order to dissipate heat from the stator.
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Specification