| 摘要 |
PROBLEM TO BE SOLVED: To obtain a motor with a core, which has a favorable rotating performance with a simple structure, at a low cost. SOLUTION: A base-meeting part (A) of teeth parts 11c with a core rib part 11b is set at a position apart from a magnetic-flux-collecting surface 11c1 with a predetermined distance or longer in the radial direction; each magnetic- flux inflow/outflow surface of the teeth parts 11c to the core rib part 11b side: that is, a dimension L3 from the magnetic-flux-collecting surface 11c1 to the base-meeting part (A) is made equal to the breadth dimension of one-side half L4 of the magnetic-flux-collecting surface 11c1, or longer; and with such a configuration, generation of magnetic saturation on the magnetic-flux inflow/ outflow surface at the base-meeting part (A) with the core rib part 11b side is almost suppressed, and the rotating performance, such as cogging, torque ripple, distortion due to counter-electromotive voltage, or the like, is favorably improved.
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