反激逆变器研究

RESEARCH ON FLYBACK INVERTER

该文提出一种新颖的反激逆变器,详细阐述了其工作原理、控制方案和设计方法。该逆变器工作于断续模式,是由两路双向反激直流变换器输入并联输出串联组成的一种单级隔离逆变器。反激逆变器占空比可以在0到0.8之间变化,从而得到较宽范围的输出电压;负载电流流过副边常通开关管,从而减小了导通损耗。实验结果表明该逆变器具有以下优点:双向功率传输、拓扑结构简单、使用器件少、控制方案简单、可靠性高以及良好的动态响应。

This paper proposes a novel flyback inverter, which works in the discontinuous conduction mode （DCM）. It is a single stage isolated inverter which consists of two bi-directional flyback dc-dc converters in parallel at input and in series at output end. Wider range output voltage can be realized by varying the duty ratio from 0 to 0.8. The conduction losses can be outstandingly reduced by load current flowing through the. normally-on switches. Its basic operational principles, control scheme, and brief design procedure are described. The experimented results show the validity of the flyback inverter that have some advantages as single stage, electrical isolation, bi-directional power flow, compact topology, etc.