Switching Angles Optimization of Single Phase PWM DC-AC Inverter by Particle Swarm Optimizations

We consider a design procedure of a single phase PWM DC-AC inverter by using a particle swarm optimization algorithm. For the single phase PWM DC-AC inverter, the switching operation is the most important component. The PSO algorithm can optimize the switching angle effectively. The design procedure of the switching angle evaluates the total harmonic distortion and the effective value of the output. The proposed evaluation function restricts the scope to evaluate of the harmonic components. Based on our numerical simulation results, we confirm that the performance of proposed design procedure is improved comparing with the conventional sinusoidal PWM procedure. Also, we develop an implementation circuit of our PWM DC-AC inverter. By using the implementation circuit, we confirm the results of implementation circuits are consistent with the results of numerical simulations. These results indicate that the proposed algorithm exhibits better performance than the conventional sinusoidal PWM DC-AC inverter.