Research on a novel inverter based on DC/DC converter topology

Abstract

The conventional inverters have the shortcomings of straightway conduction in transistors and the difficulty of realizing soft switching. A novel inverter based on the DC/DC converter topology is presented and studied in this paper. The inverter is comprised of a combined buck/boost DC/DC converter and a bridge circuit. The front stage converter is controlled to output a variable DC voltage and the bridge circuit is to convert the DC voltage to an AC output. The energy feedback technology and one-circle-control scheme are used to improve the dynamic characteristics of the DC converter. The power devices of the inverter bridge can conduct soft switching. The operation principle and the circuit topology of this inverter are analysed. Simulations and experiments are conducted to demonstrate the performance of the proposed inverter.