A Study on Novel PWM HBML Inverter Using Common-arm

Abstract

In this paper, we proposed an electric circuit using one common arm of H-Bridge Inverters to reduce the number of switching component in multi-level inverter combined with H-Bridge Inverters and transformers. And furthermore we suggested the new multi-level PWM inverter using PWM level to reduce THD (Total Harmonic Distortion). We used the switching method that can get the same rate of usage at each transformer. We tested the proposed prototype 9-level inverter to clarify the proposed electric circuit and reasonableness of control signal for the proposed multi-level PWM inverter.