| 摘要 |
PURPOSE:To improve the efficiency of cross magnetic flux, reducing a combined cogging force and rotating a rotor smoothly, by distributing armature coils on an armature core ununiformly. CONSTITUTION:The field magnet 1 of an externally rotational type rotor is provided with eight poles, and the core 3 of the armature 2 of a stator is provided with twelve slots 4 and salient poles 6. Each armature coil of each phase has four divided coils, and each one salient pole 6 is wound up with each divided coil. So far as the salient pole 6 with the pitch angle of slots with the pole between them is concerned, the salient pole 6A of the first pitch angle theta1 and the salient pole 6B of the second pitch angle theta2 are set in two kinds, and the first salient poles 6A of three units are set according to the number of phases on the circumference of the armature core 3 at equal intervals, and the second salient poles 6B of three units are set respectively between the poles 6B and the salient poles 6A in adjacent relation with each other. |
