基于双次级无损箝位的大功率DC/DC变换器  

Research on a Dual-secondary-side Lossless Snubber Full-bridge Converter

作　　者：陈桂涛[1] 陈少磊[1] 刘超[1] 

机构地区：[1]西安理工大学,陕西西安710048

出　　处：《电力电子技术》2009年第9期18-19,71,共3页Power Electronics

基　　金：陕西省教育厅产业化培育项目(08JC08);西安理工大学青年教师科学研究计划基金(105-210712)~~

摘　　要：研究了一种适用于高压大功率场合的新型双次级箝位全桥变换器拓扑,该拓扑通过移相控制实现H桥超前桥臂的零电压开关(ZVS),并通过新型低漏感高频变压器尽量减小滞后臂的损耗及对次级的影响;采用双变压器结合次级无源无损箝位吸收电路的拓扑结构,可以有效限制次级整流电压过冲、降低应力、减少损耗、提高效率并增强可靠性。理论分析和实验结果验证了该拓扑在高压大功率应用场合的优越性。The paper focuses on a novel dual-secondary-side lossless snubber full-bridge soft-switching DC/DC converter for high voltage and large power application.The ZVS of the master leg is obtained by shift-phase control and the loss is reduced by minimizing the leakage inductance of transformers.The voltage overshooting is reduced,the stability and efficiency of the converter are improved by a parallel primary,series secondary arrangements of the transformers and the lossless snubber.Also,the loss of the converter is greatly reduced.Theory analysis and the experimental results prove the superiority of the converter.

关 键 词：变换器 高频变压器/全桥 移相控制 

分 类 号：TM46[电气工程—电器]