| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor capable of suppressing a leakage magnetic flux.SOLUTION: A brushless motor 11 comprises: a stator 16 that is supported by a yoke housing 13 and generates a revolving magnetic field; a ball bearing 23 that is supported by the yoke housing 13; and a rotor 21 that includes a shaft 22 supported by the ball bearing 23 in a rotatable manner, first and second rotor cores 31 and 32 in which a plurality of first and second claw-like magnetic poles are extended and formed at equal intervals in outer peripheral parts of first and second core bases 31a and 32a supported by the shaft 22, where the first and second claw-like magnetic poles are disposed alternately in a circumferential direction while making the first and second core bases 31a and 32a opposite to each other, and a disk magnet 33 disposed between axial directions of the first and second core bases 31a and 32a and magnetized in an axial direction to function the first claw-like magnetic pole as a first magnetic pole and function the second claw-like magnetic pole as a second magnetic pole. The ball bearing 23 is formed from a nonmagnetic substance.SELECTED DRAWING: Figure 1 |
