一种采用倍流同步整流的高效率AC/DC变换器  

A High Efficiency Soft Switched AC/DC Converter with Current Doubler Synchronous Rectification

作　　者：汪育华 张胜发[1] 朱仲尼[1] 

机构地区：[1]空军雷达学院,湖北武汉430019

出　　处：《通信电源技术》2008年第1期36-38,42,共4页Telecom Power Technology

摘　　要：文章介绍了一种基于不对称半桥的改进型AC/DC变换器。为了提高低压大电流应用场合的变换器效率,变换器次级采用倍流同步整流技术,而初级开关管能自然实现零压开通。因而,变换器的次级整流损耗和初级功率开关管损耗被大大降低。文中详细分析说明了电路的具体工作过程和设计要求,最后,仿真结果验证了电路设计的合理性。An improved AD/DC converter based on asymmetrical half-bridge topology is proposed in this paper.To substantially enhance the efficiency for low-voltage/high-current output applications,a current-doubter synchronous rectifier is combined with a modified asymmetrical half-bridge converter that retains the inherent zero-voltage-switching property.The power losses in the secondary rectification stage and the primary switches can be significantly reduced.

关 键 词：不对称半桥(AHB) 倍流整流 同步整流 

分 类 号：TM46[电气工程—电器]