Study of Three Phase Cascaded H-Bridge Multilevel Inverter For Asymmetrical Configuration

We know that, the inverters are broadly classified as two level inverters and multilevel inverters. This conventional inverters have many limitations at high power and high voltage applications. However, the multilevel inverter becomes popular for high power and high voltage applications due to their increased number of levels at the output. As number of levels increases, the harmonics are reduced and output voltage tend to become more pure i.e., sinusoidal. There are three types of topologies used in multilevel inverter, 1) neutral-pointclamped (NCP), 2) flying capacitors, 3) cascaded H-bridge. Among this, Three phase cascaded Hbridge multilevel inverter is further divided in two configuration, 1) Symmetrical and 2) Asymmetrical. This paper deals with, study of Asymmetrical configuration for seven level Hbridge multilevel inverter. We prepared the simulation for five level symmetrical, seven level symmetrical and Asymmetrical configurations in MATLAB.