| 摘要 |
A subfractional horsepower, permanent magnet motor has a stator assembly with a pair of axially aligned stator coils in stacked relation, and complementary metal housing members that enclose the coils and define a series of stator poles. An elongated sleeve disposed within the annular stator assembly provides, with the metal housing members, magnetic circuits that surround the stator coils. The stator sleeve is disposed over and interfitted with a frame core that has significantly greater thermal conductivity than the thermal conductivity of the stator sleeve. A channel extends from at least one of the stator coils along the axial length of the core to the base, and the leads of that coil extend radially inward from the coil and along the channel to the base and therefrom externally of the motor. The motor rotor has a cylindrical sleeve portion with a circumferential array of axially extending permanently magnetized rotor poles equally spaced about the periphery, and the rotor is supported such that a uniform annular air gap is provided between the outer surface of the stator assembly and the inner surface of the rotor sleeve.
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