移相全桥电路寄生振荡的抑制策略  

The Suppression Strategy of Parasitic Oscillations in Phase-shifting Full Bridge Circuits

作　　者：高瑞祥 高俊侠[1] 李永亮 唐范 GAO Rui-xiang;GAO Jun-xia;LI Yong-liang;TANG Fan(Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学,北京100124

出　　处：《电力电子技术》2024年第11期38-40,43,共4页Power Electronics

基　　金：国家重点研发计划(2022YFF0706202-1)。

摘　　要：移相全桥电路中,由于变压器次级整流二极管自身有寄生电容,它会与谐振电感谐振产生电压振荡与电压尖峰。此处分析了寄生振荡的产生机理,在对电路拓扑进行改进后,采用在变压器次级加有源箝位电路的方法来消除寄生振荡,利用Matlab软件进行仿真验证,然后在实际电路中进行实验验证,结果表明,在大功率场合中,此处采用的方法可以消除寄生振荡。In a phase-shifting full bridge circuit,due to the parasitic capacitance of the rectifier diode on the secondary side of the transformer,it will resonate with the resonant inductor to generate voltage oscillations and voltage spikes.The generating mechanism of parasitic oscillation is analyzed.After improving the circuit topology,the method of adding an active clamping circuit on the secondary side of the transformer is adopted to eliminate parasitic oscillation.Matlab software is used for simulation verification,and then experimental verification is carried out in actual circuits.The results show that the used method can eliminate parasitic oscillation in high-power situations.

关 键 词：移相全桥电路 寄生振荡 有源箝位电路 

分 类 号：TM13[电气工程—电工理论与新技术]