A hybrid approach for solving nonlinear equations of SHEPWM in multilevel inverters

Because of nonlinear nature of corresponding equations in SHEPWM switching strategy, applied to stepped waveform of multilevel inverter´s output voltage, using genetic algorithm Toolbox of MATLAB software is a normal solution. Two approaches for solving the equations have been selected in literature. In the first, the equations are solved by constructing nonlinear equally constraints, while in the second, a fitness function, covering all equations, is minimized. In this paper, a hybrid approach is proposed to surmount all disadvantages of mentioned approaches. Simulation results, as well as experimental results are presented to verify the theoretical results.