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.