| 摘要 |
PURPOSE:To improve the utility rate of a magnetomotive force by forming a stator winding of the first and second windings having different number of poles, and disposing a rotor winding having one or more turns equally on the entire periphery in the number of average of the number of poles of the stator windings. CONSTITUTION:An induction rotary electric machine 40 is composed of a stator having a stator core 11 held in a housing 9 and a rotor having a rotor shaft 4 and a rotor core 5. The winding 10 of the stator is formed of two types of 3-phase windings 10a, 10b having different number of poles, the winding 20 of a rotor is formed of a plurality of rotor winding groups 30, and the number of the groups 3 has the number of average of the first and second stator winding poles. Further, the first winding 10a is connected with a 3-phase AC system 12, and the second winding 10b is connected through a transformer 16 and a breaker 17 with a frequency converter 13. Thus, the rotating speed can be altered by controlling the frequency of the voltage applied to the winding 10b. |
