软开关推挽式高频链逆变器

发布时间：2018-10-10 19:53

【摘要】：提出一种新颖的单级式推挽高频链逆变器拓扑,变压器初级侧采用电源端串接一个开关管的三管推挽结构,次级侧采用双绕组全波式周波变换器结构。该类逆变器具有拓扑简洁、初次级开关管均可在宽输出电流区间范围内实现零电压开通、变换效率高等优点。电路采用正弦脉宽脉位调制策略,变压器初级侧辅助开关管的工作频率是另外2个开关管的2倍,除去死区时间,辅管的驱动信号逻辑上是另外2个开关管驱动信号的与非关系。详细分析了各工作模态,讨论了次级占空比丢失、软开关实现条件及特殊变压器设计的关键电路参数设计准则等。最后,制作了一台输入40~60 V DC、输出110V AC、额定功率660 W的原理样机,实验波形及较高的变换效率验证了所提拓扑的正确性。
[Abstract]:A novel single-stage push-pull high-frequency chain inverter topology is proposed. The primary side of the transformer adopts a three-transistor push-pull structure with a switching tube connected in series at the primary side of the transformer, and the secondary side adopts a two-winding full-wave Zhou Bo converter. This kind of inverter has the advantages of simple topology, high conversion efficiency and zero voltage switching in the wide output current range. The circuit adopts sinusoidal pulse width modulation strategy. The working frequency of the auxiliary switch on the primary side of the transformer is twice as high as that of the other two switches, and the dead time is removed. The driving signal of the auxiliary tube is logically independent of the driving signal of the other two switch tubes. The working modes are analyzed in detail, and the loss of secondary duty cycle, the conditions of soft switch realization and the design criteria of key circuit parameters for special transformer design are discussed. Finally, a prototype of the output 110V AC, rated power 660W with 40V 60V DC, input is made. The correctness of the proposed topology is verified by the experimental waveform and high conversion efficiency.
【作者单位】：华东交通大学电气与自动化工程学院;
【基金】：国家自然科学基金资助项目(51467005) 江西省自然科学基金资助项目(20142BAB206025)~~
【分类号】：TM464

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