Analysis of Three Phase Inverter Using Different PWM Techniques

Abstract

There are many inverter topologies in which cascaded inverter have some advantages compared to other multilevel inverters such as reduced harmonics but they have drawbacks also such as many heat losses, more switches, high cost. But in this new configuration which is developed in this project overcome all these disadvantages. In this project four different pulse width modulation techniques are used, they are In Phase disposition, Phase Opposition disposition, Overlap Carrier disposition, and Frequency Varying disposition methods. This paper discusses new configuration with 10 power switches and four DC sources. The proposed configuration includes many advantages compared to existing configurations the advantages are very less cost, less switching losses, less harmonics, and greater efficiency at output. The circuit is built in matlab software and results are verified to select the best Pulse width modulation technique which has reduced Total Harmonic Distortion in output. In order to make the output voltage more sinusoidal and reduce the THD, LC Filter is used.