A New Multilevel Inverter Topology with Minimal Power Electronics Component

Multilevel inverters are widely used in high power and high voltage applications. These inverters have many advantage over two-level inverters in terms of harmonic contents, voltage stress, electromagnetic interference etc. But, it has some disadvantage as increased number of power electronic switches, driver circuits and voltage sources. A new cascaded multilevel inverter topology has been developed with a focus to overcome all the disadvantages mentioned. In this topology number of switches required in current path for a level in output voltage has been reduced and also requirement of other parameters are also reduced. Therefore, the overall cost and the space for installation is reduced as compared to traditional topologies like Cascaded H-bridge, Flying Capacitor, Modified H-bridge inverter and series connected inverter etc. Proposed multilevel inverter structure can generate 127 level in output voltage by using only three basic unit in cascading manner. The performance of the proposed structure has been verified for 31-level inverter using MATLAB/SIMULINK and differen simulated waveforms are presented in this paper.