摘要
对同步整流的概念进行了定义并按驱动方式将它分为自驱动同步整流和外驱动同步整流;然后对正激变换器中自驱动和外驱动同步整流的特性分别进行了比较分析,在自驱动部分重点分析了RCD箝位和有源箝位2种形式的同步整流正激变换器电路;并讨论了影响同步整流效率的因素及提高效率应采取的措施;最后通过实验得出结论,同步整流是低压、大电流电源中提高效率的有效方法。
In this paper, firstly, the fundamental conception of synchronous rectification was defined, then it was sorted into self-driven and control-driven synchronous rectification according to its driving mode. The characteristics of self-driven and control-driven synchronous rectification in forward converter are compared and analysed, in self-driven, the forward converter with RCD clamp and with active clamp were analysed respectively. The factors that affect efficiency of synchronous rectification and the methods to improve efficiency are also discussed. Finally, we can learn by experiments that the limited efficiency improvements can be achieved by using synchronous rectification in a low voltage, high current power supply.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2005年第1期80-82,86,共4页
Journal of Wuhan University of Technology
关键词
正激变换器
同步整流
自驱动
外驱动
forward converter
synchronous rectification
self-driven
control-driven
