新型ZVS全桥DC/DC变换器  

Novel full-bridge ZVS DC/DC converter

作　　者：胡平[1] 谢顺依[1] 杨迎化[2] 刘小虎[1] 

机构地区：[1]海军工程大学兵器工程系,湖北武汉430033 [2]海军潜艇学院导弹兵器系,山东青岛266071

出　　处：《电力自动化设备》2010年第2期103-105,共3页Electric Power Automation Equipment

基　　金：国防"十一五"预研项目(101010601202)~~

摘　　要：针对移相全桥软开关变换器存在的滞后臂难以实现零电压开关(ZVS)和占空比丢失的问题,提出了一种新型的全桥移相零电压变换器拓扑,采用3个等效的高频变压器替代传统的高频变压器,将阻断电容分成2个等效电容串联在桥臂中点之间,增加1个辅助电感实现滞后臂的ZVS。论述了所提出变换器的电路结构、工作原理和关键参数的设计。根据新的拓扑,设计了一台9kW的实验样机,实验结果证明了该电路拓扑能在宽的负载或输出范围内实现软开关。Aiming at the difficulty of ZVS（Zero VoltageSwitching） for the lagging leg of phase-shifted full bridge software converter and the duty cycle lost,a novel topology of full-bridge phase-shifted zero-voltage converter is proposed,which adopts three equivalent transformers instead of the conventional high frequency transformer,divides the blocking capacitor into two equivalent capacitors in series between the midpoints of bridge legs,and adds an auxiliary inductor to realize the ZVS of lagging leg. The structure,operating principle and key parameter design of converter are explained. A 9 kW prototype is designed and the experimental results show that,the soft-switching is realized in a wider range of output or load.

关 键 词：移相 全桥 零电压开关 占空比丢失 DC/DC变换器 

分 类 号：TM464[电气工程—电器]