Comparative study of SVPWM (space vector pulsewidth modulation) & SPWM (sinusoidal pulse widthmodulation) based three phase voltage sourceinverters for variable speed drive

Abstract

We have performedcomparative studies of Space Vector Pulse Width Modulation (SVPWM) and Sinusoidal Pulse Width Modulation (SPWM)techniques utilizing MATLAB tools. During these investigations, we carried out intensive simulations, comprehensively analyzed the obtained results and compared the harmonic density, power factor (PF), & switching losses of SVPWM and SPWM. It has been observed during investigations that if the switching frequency is high then losses due to harmonics are negligible, thus based on obtained results we suggested that the SVPWM technique is a more reliable solution. Because SVPWM utilizes DC bus voltage more efficiently, generates less Total Harmonic Distortion (THD) andhas higheroutput quality it provides flexible control of output voltage and output frequency for Variable Speed Drive (VSD).