Direct Thrust Force Control (DTFC) of Optimized Linear Induction Motor with Super Twisting Sliding Mode Controller (STSMC)

Linear Induction Motors (LIMs) are used in somewhere that require linear motion. There are many control methods for speed control of LIMs. One of them is Direct Thrust Force Control (DTFC). DTFC method has disadvantages like ripple of output speed. In this paper, to solve this problem, have been used a controller that called Super Twisting Sliding Mode (STSM). We have combined STSM controller with DTFC structure for speed control of LIM. The STSM controller has been used in all DTFC components such as speed, flux and torque. Also we have used a two-level three-phase converter that was switched by space vector modulation (SVM). The stability of the proposed system has been investigated by Lyapunov's theory. The performance of the proposed control structure has been simulated by MATLAB/Simulink software. Also we have used Particle Swarm Optimization (PSO) algorithm for design and optimization LIM. According to the results ripple of speed in proposed method is less than DTFC. Also proposed method had faster response speed than DTFC.