An Improved Fuzzy Logic Control Strategy of an Optimized Linear Induction Motor Using Super Twisting Sliding Mode Controller

Abstract

The Fuzzy Logic Control (FLC) strategy like other control methods has some disadvantages like less accuracy, high Total Harmonic Distortion (THD) and low respond of speed. In this paper, first a proposed structure for improving FLC by Super Twisting Sliding Mode (STSM) controller has been introduced. Then a Linear Induction Motor (LIM) has been designed and optimized using Particle Swarm Optimization (PSO) algorithm. The results show, ripple of output speed in the proposed structure was 1.07% and ripple of speed’s path in that was 0.37%, while in the FLC, ripple of output speed and ripple of speed’s path was 2.01% and 0.5%, respectively. Also, actual speed in the FLC and proposed structure, achieved to reference speed in 312ms and 156ms, respectively. As well as, stator current’s THD of the proposed structure and FLC was 9.17% and 20.05%, respectively.