Comparative Study between SPWM Control Techniques THIPWM for PWM-VSI using Mathematical Modeling and Simulation

This paper discusses the comparative study between two pulse width modulation (pwm) control techniques namely sinusoidal pwm (spwm) and third harmonic injection pwm (thipwm) to drive a single phase voltage source inverter (vsi) circuit system based on mathematical modeling and computer simulation using matlab simulink software. the dynamic mathematical model of pwm-vsi is designed based on simplified switching function concept. hence, the gating signals generation method, fundamental output voltage amplitude, output current magnitude, output power, efficiency, harmonics filter size and total harmonics distortion (thd) content in the output voltage of pwm-vsi inverter are selected as the comparison parameters. the results show that the comparative study of mathematical model design of pwm-vsi utilizing spwm and thipwm control techniques have been successfully implemented and verified via computer simulation.