Simplified PWM Technique for Multilevel Inverter Fed Induction Motor Drive to Reduce Total Harmonic Distortion

Abstract

The multilevel began with the three level converters, the elementary concept of a multilevel converter to achieve higher power. Multilevel converters offer high power capability, associated with lower output harmonics and lower commutation losses.  In the proposed project, simplified PWM technique has to be applied to formulate the switching pattern for two level inverter, three level and five level “cascaded multi-level inverter” fed induction motor drive using MATLAB/Simulink. Finally Total Harmonic Distortion of stator current of induction motor and output voltage of cascaded multi-level inverter has to be compared.