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.
出处
《电力电子技术》
CSCD
北大核心
2002年第6期51-53,共3页
Power Electronics
