| 摘要 |
PURPOSE:To preferably readhere at wheel slipping time even if a plurality of induction motors are connected in series and used by providing isthmi in a magnetic circuit of the motor. CONSTITUTION:A stator has stator grooves 2 on a stator core 1, the magnetic resistance of the part of the magnetic circuit of a rotor having rotor grooves 4 on a rotor core 3 is increased, and isthmi 5 which are saturated when becoming the prescribed magnetic flux or larger are provided. When the voltage share increases so that the magnetic flux increases at the slipping time, the exciting current increases due to the magnetic saturation, the torque decreased, thereby facilitating to readhere. |
