Having three "waves" of magnetism induced in the rotor with every revolution, instead of just one, smooths out the induction process and allows more torque to be generated.
In vector control of induction motor, the key problem is to estimate rotor flux accurately.
异步电机矢量控制的关键问题在于精确地估计转子磁链。
3
The Pulse Generators PGs are equipped to detect the rotor frequency of induction traction motors for the torque control in railway vehicle traction field.