| 摘要 |
PURPOSE:To enable to readily start rotating by starting rotating by a magnetic force acted between poles generated at a stator and an auxiliary stator and the pole of a rotor. CONSTITUTION:When a power source is turned ON at a time T0, initial operation control means 12 operates until reaching the predetermined time T1. Accordingly, a current is flowed to auxiliary windings 11a, 11b to excite auxiliary stators 10a, 10b to generate poles. A current is also flowed to an armature winding 4 to generate poles at the ends 3a, 3b of a stator. At this time, clockwise forces of couple are generated, and the rotor 1 starts rotating. When becoming the time T1 before the direction of the current is inverted, the means stops its operation, no current is flowed to the windings 11a, 11b, and the forces of couple for disturbing the rotary motion of the rotor 1 are not generated, thereby continuing the rotation of the rotor. |
