Comparative performance analysis of fuzzy PI, PD and PID controllers used in a scalar controlled induction motor drive

While conventional P, PI, PID controllers are widely used in industries they exhibit poor performance and sluggish response when applied to an induction motor drive. These controllers are even very sensitive to parameter variations and also have stability issues. But the advancement in fuzzy logic has made fuzzy logic controllers more robust, accurate and fast. In this paper, a scalar V/f control strategy is implemented with fuzzy logic controllers of different structures like PI, PD and PID. Then the performance of the drive system is simulated and evaluated. Our results show that PID type fuzzy logic scheme gives a superior performance as compared to PI and PD type controllers. The modeling of induction motor and control scheme are done using Matlab/Simulink.