| 摘要 |
PURPOSE:To increase the torque ripple frequency and to reduce the machanical vibration and electric noise by forming the interval between the wound coils confronting a plurality of rotor magnetic poles magnetized at equal interval odd times of the interval between the rotor magnetic poles. CONSTITUTION:A magnet rotor 1 having, for example, 8 poles 1-1-1-8 magnetized at N and S alternately at equal interval is secured to a magnetic disk, and is rotatably mounted through a boss on a shaft. In case, for example, of two-phase motor. The armature windings 5-1 and 5-2 having three times of the interval between the poles 1-1-1-8 of the magnet rotor 1 is confronted with the magnet rotor 1, and the windings 5-1, 5-2 are energized in response to the outputs of the hall elements 7-1, 7-2, for example, for detecting the position of the rotor 1. Thus, the windings 5-1, 5-2 are not energized, and the number of the poles of the rotor 1 can be increased, and the torque ripple frequency can be increased. |
