Slip frequency correction method for indirect vector control system considering parameters deviation

Induction machine with indirect vector control system has advantages of simple structure and high performance. But under the condition of parameters deviation, both steady-state and transient performance of this system are influenced. The succeeding section of this paper analyses the effect of parameters deviation for indirect vector control system. Then a slip frequency correction method is proposed in the following section to minimize error of rotor flux position and improve the system´s robustness to parameters changing. The results of this paper give some reference to the design of indirect vector control system with considering parameters deviation.