摘要
本文介绍了一种新的移相全桥PWM DC/DC变换器,在输出续流回路中引入了辅助电感,通过续流时产生感应电动势使原边电流复位,相对于传统的利用箝位电容的方法,此拓扑结构简单,电感勿需预先储能,不会增加原边电流应力,实现滞后桥臂零电流开关,并且降低了副边占空比的丢失,文中详细地分析了变换器的工作原理,最后给出了试验结果。
A novel DC/DC converter using phase-shifted full bridge PWM DC/DC is introduced, added a auxiliary inductance to output proper path, during the follow current period, the auxiliary inductor brings induction electromotive force to reset primary current. This kind of new topology is very simple. The inductor does not need store energy at first,it can not add the stress of primary current,the laging leg of the converter achieves zero-current switching, and it reduce the loss of duty ratio at secondary side. The paper analyses operating principle and process particularly. The result of experiments proves the converter is feasible.
出处
《仪器仪表用户》
2009年第6期5-6,14,共3页
Instrumentation
