Abstract
The purpose of this paper is to improve the efficiency of the single-phase PWM DC-AC inverter based on the optimization of the switching-phase of the PWM. The improvement of the efficiency means to improve the quality of the output waveform, the efficiency of the conversion, and the reduction of the switching-loss. We propose an evaluation function which corresponds to the minimum value of the evaluation function by using the particle swarm optimization algorithm. We improve the efficiency by setting a criterion of each index. As the result, the proposed algorithm can reduce high harmonic components in the switching times smaller than that of the conventional triangle wave comparison method. Also, we confirm that the algorithm can improve the quality of the output waveform and the efficiency of the conversion.
