Multi-level inviter design and topologies

Abstract

AC power is most widely used power sources both in household appliances and industrial machines. But when AC supply is not available for a certain period of time at that time we need to convert stored DC power in to AC power. This issue can be resolved by the power electronics equipment called as an Inverter. Basically inverters are circuits that convert DC input voltage to a symmetric AC output voltage by which both magnitude and frequency can be controlled. Different types of inverters are available in the market for different purposes. In this paper we are going to represent a brief review of different multilevel inverter topologies and our proposed single phase cascaded inverter with transformer. We designed a two stage and a three stage cascaded inverter with transformer. In the paper we showed our proposed circuit’s output wave shape and how their FFT analysis, PMW modulation technique controls the amplitude at desired frequency as well as how it decreases the harmonic distortions.