SPWM Methods Comparition for Multilevel Inverterts

A thorough investigation has been conducted in order to determine the impact of common mode voltage in multi-level inverters.

Simulation results of paper entitled: Comprehensive Investigation on CM Voltage, Bearing Current, and THD in MLI-fed Motor Drives using SPWM

In this paper six PWM approaches are employed for fivelevel MLI-fed motor drives, and the results were compared. The three five-level-inverters used are CHB, NPC and PUC, which use PD, POD, APOD, COPD, COPOD and COAPOD SPWM switching methods.