| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor core capable of effectively reducing deterioration in iron loss, even when used while a compressive stress is applied from the outer periphery of the core. <P>SOLUTION: The motor core has a stator comprising a laminate of electromagnetic steel plates, which has teeth and a back yoke, and is imparted with a compressive stress of ≥10 MPa to the circumferential direction of the stator. In the motor core, the compressive stress of ≥0.3 MPa is imparted in the laminate direction of the back yoke, and the thickness of an insulation coating of the electromagnetic steel plates is set at ≥0.4 μm and ≤10 μm per one surface when the insulation coating is applied on both surfaces of the steel plate, and at ≥0.8 μm and ≤20 μm per one surface when the insulation coating is applied on only one surface of the steel plate. <P>COPYRIGHT: (C)2011,JPO&INPIT |
