Comparison of closed loop optimal high level novel multilevel inverter fed induction motor drive using PI and fuzzy logic controllers

Abstract

The Multilevel inverter technologies which are widely used in medium, high voltage and high power requirements have attracted many researchers around the world. In comparison with conventional two level inverters,the multilevel inverters (MLIs) gives better performance by the way of lower harmonic distortion, low electromagnetic interference and produces quality output. Control techniques such as complex PWM technique and more count of components need in MLI for achieving power quality.In this primarily introduces new high performance one phase 63 level MLI topology of least count of switches. Later on the same is extended for three phase high performance MLI, that offers minimum THD. Three phase induction motor is coupled to the proposed MLI in open loop form and then implemented in the closed loop form with proportion integral (PI) controller. This drive is further extended with a fuzzy logic controller (FLC).The validity of proposed drive with respect variations in torque and speed is verified with MATLAB/SIMULINK.