采用辅助谐振网络实现零电压开关的移相控制全桥变换器

移相控制全桥变换器能够实现开关管的零电压开关，但滞后桥臂难度很大。本文提出了电流增强原理，在此基础上，提出了一种新颖的移相控制全桥变换器，它是在传统的全桥变换器中加入了一个辅助谐振网络，来帮助实现滞后桥臂开关管的零电压开关。在文中，对这种变换器的工作原理作了分析，仿真与实验结果验证了该变换器的可行性。

A Novel Phase-Shifted Zero-Voltage-Switched Full-Bridge ConverterEmploying an Auxiliary Resonant Net

Phase - shifted converter realizes zero - voltage - switching with the use of leakage inductor of the main transformer, however, the realization of ZVS for lagging bridge leg is difficult. This paper pro- poses a current enhance principle, and based on which, a novel phase - shifted converter is proposed which adds an auxiliary resonant net to the conventional full - bridge converter to help the lagging bridge leg to realize ZVS . The principle and parameter design of the novel converter are analyzed, and simula- tion and experimental results verified the principle .