Analysis of a Modified Single Phase Multilevel Cascaded Inverter Circuit

A modified circuit of single phase five level cascaded inverter state of art design topology is discussed. The modified circuit has reduced number of switches and a comparison of the total harmonic distortion with various pulse width modulation techniques was carried out. A multicarrier sinusoidal pulse width modulation approach is used to control the distortion in the inverter. Several types of multi carrier pulse width modulation techniques have been analyzed in this paper. For higher modulation index value the Phase Disposition offers the lowest level of Total harmonic distortion. To validate the objective MATLAB/Simulink simulation software was used and it has been justified by using the experimental results.