A Unique Single Source Nine Level Inverter with Reduced Switching Devices for Single Phase AC Applications

Abstract

In recent times there is a huge demand in reduced switched multilevel inverter. The multilevel inverter is one of the attractive features in harmonics elimination. This paper proposes single source nine level inverter with reduced switching devices for single phase AC applications. The conventional cascaded and other multilevel inverter comprises of more number of switches, passive components as well as sources. This makes the system larger in size, weight as well as less cost effective. The proposed multilevel inverter has the ability of producing nine levels with reduced number of switches and source. In addition to that the single source nine level inverter utilizes the simplified control algorithm which reduces the complexity. The Sinusoidal Pulse Width Modulation (SPWM) scheme is one of the most common control techniques which have the simple structure. The operation of the circuit and control algorithm is discussed in detail. The results are verified by the Matlab/Simulink which shows the value and righteousness of the system.