| 摘要 |
<p>A brushless motor, comprising a rotor (6) having a magnet body (1) with magnetic poles of 2m in quantity to which N-pole and S-pole are alternately magnetized in the rotating direction and a core (3) radially opposed to the magnet body and having a salient pole section (4) with salient poles of 3n in quantity around which a coil is wrapped. In the magnet body, the magnetic flux generating part of each pole is reduced by an electrical angle alpha less than a magnetic pole pitch and the open angle theta of the salient pole is set to a specified electrical angle. Thus, the cogging torque of the brushless motor can be reduced, and the rotating accuracy thereof can be increased.</p> |
