单级双向反激式高频环节逆变器研究

Research on Single-stage Inverter based on Bi-directional Flyback Converter with High Frequency Link

讨论了一种新颖的基于双向反激拓扑的单级逆变器,并对该电路拓扑的工作原理、控制策略和关键电路参数设计进行了深入的分析。该拓扑由两个完全相同的双向反激变换器构成,两个双向变换器输入并联、输出串联,负载与两个双向变换器的输出端连接,从而组成一种单级逆变器。该逆变器具有单级功率变换、结构简洁、双向功率流和可靠性高等特点。实验充分证实了理论分析的正确性和单级逆变器的可行性。

A novel single-stage inverter with high frequency is proposed in this paper,which is referred to as flyback inverter.Operation principle,control strategy and circuit design of the new single-stage flyback inverter are presented.The single-stage inverter is constituted of two absolutely same bi-directional DC-DC converters （BDC） which get high frequency electrical isolation.Two BDC are in parallel at input and in series at output,thus the load is connected with two outputs of each BDC.The single-stage inverter have the advantages of single-stage power transfer,simple topology,bi-directional power flow, and high reliability.The feasibility of the inverter and the correctness of theo-retical analysis are verified by the simulative and experimental results.