| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotor which can be made proper further while including auxiliary magnets.SOLUTION: A rotor 11 includes first and second rotor cores 21 and 22, and an annular magnet. In the first and second rotor cores, a plurality of first and second pawl-like magnetic poles 21b and 22b are projected radially outsides at equal intervals and formed while axially extending in outer peripheral parts of substantially disk-shaped first and second core bases 21a, the first and second core bases 21a are made opposite to each other, and the first and second pawl-like magnetic poles 21b and 22b are disposed alternately in a circumferential direction. The annular magnet is disposed in an axial direction between the first and second core bases 21a and axially magnetized to function the first pawl-like magnetic poles 21b as first magnetic poles and to function the second pawl-like magnetic poles 22b as second magnetic poles. As auxiliary magnets, first and second inter-pole magnets 26 and 27 are provided in a circumferential direction between the first and second pawl-like magnetic poles 21b and 22b, and the first and second inter-pole magnets 26 and 27 are formed from magnets having a greater coercive force than that of the annular magnet.SELECTED DRAWING: Figure 2 |
