Carrier based single-state PWM technique in multilevel inverter

Abstract

In the paper, a novel analysis of carrier based PWM methods for multilevel inverters is presented. The space vector PWM and carrier based PWM correlations are investigated in a nominal two-level switching diagram. The obtained results will be applied to design various carrier PWM techniques. In this paper, a carrier based single-state PWM technique, which reduces number of switchings and optimizes active voltage errors will be presented. This technique can be advantageous in high level inverters. The carrier base PWM approach shows a flexible offset control. The proposed method is mathematically formulated and demonstrated by simulation and experimental results. © 2007 IEEE.