异步电动机转子穿电阻调速，使电动机的转差率增大，电机在较低的转速可以运行。-Asynchronous motor rotor resistance to wear resistance, so that the motor slip rate increases, the motor can run at a lower speed.

比较详细的电机控制用的svg，异步发电机控制用(More detailed motor control using svg)