| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure which materializes a structure of reducing the displacement of a permanent magnet in the axial length direction, within a range capable of satisfying the thinning. <P>SOLUTION: An electromagnetic steel sheet at the endmost of a laminated electromagnetic steel sheet is provided with a structure of preventing movement of a permanent magnet in the lamination thickness direction. The laminated electromagnetic steel sheet is provided with a groove having a width substantially equal to or slightly larger than the circumferential width of the permanent magnet, and a depth substantially equal to or less than one half of the thickness of the permanent magnet. The electromagnetic steel sheet at the endmost of a laminated electromagnetic steel sheet has, at a part of the groove, a surface protruding so as to touch the end of the permanent magnet directly. Consequently, the permanent magnet can be attached effectively by reducing the displacement, while limiting increase in the size of a motor. <P>COPYRIGHT: (C)2013,JPO&INPIT |
