Vector control system of induction motor based on feed-forward decoupling scheme

ZHANG Wei1， ZHANG Nan1， CHEN Ping2
（1. Department of Electrical Engineering， Zhejiang University， Hangzhou 310027，China；
2. Zhejiang Testing Institute of Electronic Products， Hangzhou 310027， China）

Abstract：In order to improve the torque dynamic response，an improved vector control scheme for induction motor was proposed. Analyzing the cross-coupling voltage after vector transformation，a feed-forward decoupling scheme was introduced，while the fuzzy-PI controller was used to replace the traditional PI controller to reduce the dependence on motor parameters in calculating the compensation items and improve the stability of system. Finally，the effect of this control scheme is verified in experiment. The results indicate that，the proposed control strategy can guarantee the system has good stability，and it can significantly improve the dynamic response characteristics of induction motor torque.
Key words： induction motor； vector control； feed-forward decoupling； fuzzy-PI； torque； dynamic response