| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotor that can further increase an effective magnetic flux. <P>SOLUTION: First to fourth rotor cores are disposed along an axial direction of a rotation axis 12. An annular magnet is disposed between core bases 21a and 22a of a pair of first and second rotor cores 21 and 22. The annular magnet is held by the core bases 21a and 22a. Claw-shaped magnetic poles 21b and 22b of the first and second rotor cores 21 and 22 are respectively protruded outward in a radial direction from outer peripheral parts of the core bases 21a and 22a, and are disposed alternately along a circumferential direction. A width L1 in a circumferential direction of a basal end of the claw-shaped magnetic pole 21 disposed at an end part in the axial direction is formed to be narrower than a width L2 of a basal end of the claw-shaped magnetic pole 22b of the rotor core 22. <P>COPYRIGHT: (C)2013,JPO&INPIT |
