Comparative Analysis of reduced switches MLI with Cascaded H-bridge Multi-level inverter

Abstract

Recently, the evolution of single phase multilevel inverters has been escalation due to its preference over traditional one. This paper represents the Cascaded H bridge multi-level inverter implemented with the pulse width modulation techniques and the multilevel inverter with the reduced number of switches. The Multilevel inverter performance is high compared to the conventional two level inverters due to their reduced harmonic distortion and less amount electromagnetic interference. In this scenario, Cascaded H Bridge MLI is preferred and the performance of the inverter can be improved by using different pulse width modulation techniques. The main disadvantage of the Cascaded MLI is complexity, requiring a great number of power devices and passive components, and a rather complex control circuitry. So in order to overcome the complexity nature the reduced switches multi-level inverters are proposed in this paper. So that the topology [1] and the proposed topology multi-level inverters are compared with the Cascaded H bridge MLI.  These methods are modelled by using the MATLAB/SIMULINK and the THD of these inverters are compared.