Evaluation of membership functions for fuzzy logic controlled induction motor drive

In this paper, different types of membership functions are evaluated in the fuzzy control of an induction motor drive. The general membership functions under consideration are triangular, trapezoidal, Gaussian, bell, sigmoidal and polynomial types. In the beginning, fuzzy controller sensitivity has been analyzed and compared for different membership functions with the triangular function as the base. The performance of fuzzy control is then evaluated with each type of membership function for a speed-controlled induction motor drive with indirect vector control in the inner loop.