FUZZY SLIDING MODE SPEED CONTROLLER WITH ACTIVE DAMPING CONTROL FOR DUAL-PMSM

Abstract

Permanent magnet synchronous motors (PMSM) are extensively used in many industrial appli cations such as electric train tractions, industrial robots, etc. due to their high torque to weight ratio, high power density, high efficiency, reliability, and ease of maintenance. When compared to single PMSM, the dual PMSM is more cost effective. In the proposed system the two mo tors are operated in a master/slave control scheme. When the load torque is varied, there is an oscillation occured in the slave motor. In this work, active damping control is designed to suppress this unwanted oscillations. From the analysis of the system model, it is inferred that a small variation in motor parameters leads to a large variation in system performance. So various speed control techniques with active damping control are designed by using different controllers (PI, FUZZY, SMC, FUZZY-SMC) to improve the system performance. A comparison of the performance of different controllers with and without parameter variations is evaluated in MAT LAB/Simulink. By comparing the results, it is inferred that the Fuzzy Sliding Mode Controller gives the best performance among PI, FUZZY and SMC