| 摘要 |
PROBLEM TO BE SOLVED: To provide a brushless motor wherein magnetic saturation is suppressed in the engagement portions of a split core and vibration can be suppressed during driving. SOLUTION: By having laminated members, different in circumferential length of a laminated, split annular portion laminated, clearances 110, 210, 310 and 410 of the engaging portions in the circumferential direction can be dispersed in the circumferential direction from layer to layer. Therefore, the positions, in which magnetic flux (shown by broken line in the selected drawing) moves through the laminated members 101, 201, 301 and 401 adjoining in the axial direction, can be dispersed in the circumferential direction. The concentration of magnetic flux is mitigated by dispersing a flow of magnetism, and this enables magnetic saturation to be less prone to occur. COPYRIGHT: (C)2006,JPO&NCIPI
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