| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of electrolytic corrosion in a bearing of a motor inverter-driven by a PWM method, in an air conditioner with the built-in motor. SOLUTION: An air conditioner 100 includes a heat exchanger 102, a fan 103, a motor 104 for rotationally driving the fan 103 with a rotary shaft 16, and a grounding part 110 for grounding at least the heat exchanger 102. The motor 104 has a stator in which a winding 12 is wound around a stator core 11, a rotor including a rotating body 30 centering around the rotary shaft 16, bearings 15a, 15b for supporting the rotary shaft 16, and two conductive brackets 17, 19 for fixing the bearings 15a, 15b. A dielectric layer 50 is provided between the rotary shaft 16 and the outer periphery of the rotating body 30. The stator core 11 is electrically connected to the grounding part 110. COPYRIGHT: (C)2011,JPO&INPIT
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