| 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 the 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 a laminate direction of the back yoke, and the surface roughness of the electromagnetic steel plate is set at 2-50 μm at the maximum height. <P>COPYRIGHT: (C)2011,JPO&INPIT |
