准谐振软开关反激变换器的研究  

Research on Quasi-resonant Soft Switch Flyback Converter

作　　者：滕妨华[1] 张仲超[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《电源技术应用》2003年第1期9-11,共3页Power Supply Technologles and Applications

摘　　要：介绍了一种准谐振软开关反激变换器。它的主要优点是利用开关两端的电容与变压器原边电感产生的谐振,通过适当控制实现了零电压开通,减小了开关损耗,提高了变换器的效率。整个电路结构简单,满载效率高,空载损耗小。A flyback converter , known as Quasi-resonant (QR) ZVS flyback is introduced. When the converter operates in discontinuous mode (DCM), the switching can be turn on with zero voltage by using the resonance between capacitor shunted to drain-source of switch and the inductance of the transformer. The efficiency of converter can be improved with the ZVS operation of the switch. By properly designed, the converter features high efficiency at full load and low loss at stand by condition.

关 键 词：准谐振 软开关 反激变换器 开关电源 空载损耗 

分 类 号：TM44[电气工程—电器] TN86[电子电信—信息与通信工程]