| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrical steel sheet for a permanent magnet motor as an iron core material for a magnet motor used from a low output region including a no-load region to a high output region, the steel sheet enabling a no-load loss and a loss when being rotated by external force to be reduced, and to provide a permanent magnet motor obtained by using the electrical steel sheet. <P>SOLUTION: The magnet motor is obtained by using a nonoriented electrical steel sheet and a permanent magnet. The nonoriented electrical steel sheet first contains 0.1 to 4.5 mass% Si. Then, the steel sheet has magnetic characteristics satisfying all of J100≥1.75T-(1)J10/J100≤0.80-(2)W20≤3.0W/kg-(3) (wherein, J100: magnetic polarization in a magnetizing force of 10,000 A/m, J10: magnetic polarization in a magnetizing force of 1,000 A/m, and W20: core loss when being magnetized under 2,000 A/m and 50 Hz). As one embodiment of the nonoriented electrical steel sheet, the nonoriented electrical steel sheet in which the ratio of the X-ray reflecting surface intensity in the ä111} plane orientation to the random aggregated structure intensity is 3.5 to 9.0, and also, the average crystal grain size is ≥45 μm can be cited. <P>COPYRIGHT: (C)2007,JPO&INPIT |
