软开关大功率全桥PWM变换器拓扑结构的对比分析  

Topology Comparison and Analysis of Soft Switching Power Full-Bridge PWM Converter

作　　者：许峰[1] 徐殿国[1] 王健强[1] 柳玉秀[1] 

机构地区：[1]哈尔滨工业大学,哈尔滨150001

出　　处：《电力电子技术》2002年第6期51-53,共3页Power Electronics

摘　　要：比较分析三类主要的软开关大功率全桥PWM变换器拓扑结构、主要工作特征及各自的优势与不足 ,指出大功率全桥变换器的发展趋势。介绍一种采用饱和电感与次级有源钳位相结合的FB ZVS PWM变换器 ,它能有效抑制整流管电压过冲及振荡 ,扩大软开关负载范围。给出了拓扑结构、次级钳位控制电路及实测波形 ,该拓扑已成功应用在 5kW、开关频率 10 0kHz的功率电源中。Three kinds of topology for soft switching high power full-bridge PWM converter and its main feature are compared and analyzed. Some suggestions on future research are given. A FB-ZVS-PWM converter using saturable inductor and secondary active clamp is proposed. The nondissipative snubber completely eliminates the voltage overshoot and ringing across the rectifiers. The saturable inductor provides a wide ZVS load range. The principles of operation and secondary active clamp circuit are presentend. The experimental verifications from 5kW prototype converter operating at 100kHz are presented.

关 键 词：软开关 PWM变换器 拓扑结构 功率密度 大功率全桥变换器 

分 类 号：TN624[电子电信—电路与系统] TM46[电气工程—电器]