스위칭 손실 저감을 위한 이단 PWM 인버터

Abstract

he conventional pulse width modulation dc to ac inverters have a defect that all power devices are switched at high switching frequency. Therefore swithing losses are significant. This paper proposed a dual-stage inverter that full bridge switches are operating at low output frequency while a high switching frequency are performed by a pre-inverter switch. The proposed inverter is shown to have small swiching losses. Simulation and experiments are performed for verification.