Harmonic Elimination Using Switching Frequency in H-bridge Cascaded Multilevel Inverter

This paper presents harmonics elimination in H-bridge Multi-Level Inverter. The basic concept of this reduction is to eliminate harmonics in different level with an appropriate choice of switching angles. This paper employs Homotopy algorithm to solve the transcendental equations for finding the switching angles. This method solves the nonlinear transcendental equations. In order achieve a wide range of modulation indices with minimize total harmonics distortion (THD) in particularly third, five and seven level. It is much simpler formulation without complex analytical calculations for any number of voltage levels. It has several informative simulation results verify the validity and effectiveness of the proposed algorithm using MATLAB/SIMULINK.