电子科技2025，Vol.38Issue(5)：76-82,7.DOI:10.16180/j.cnki.issn1007-7820.2025.05.011
反激变换器有源钳位技术
Research on Active Clamping Technique for Flyback Converter
摘要
Abstract
In view of the problems in flyback converter,transformer leakage leads to the switch tube need to bear greater stress,large energy loss,failure to recover leakage energy and low efficiency of power supply,this study investigates the active clamping technology of flyback converter,analyzes the working principle and working process of active clamping circuit in flyback converter.The advantages of introducing active clamping technology in flyback converter are described.Based on flyback converter design method,the design process of ACF(Active Clamp Fly-back)is reviewed,a design case of ACF is given,and a prototype is made for testing.The test results show that the prototype realizes ZVS(Zero Voltage Switching)in the working process,and the efficiency is increased by about 3%when compared with the passive clamp flyback circuit.The research results show that the introduction of active clam-ping technology in flyback converter can effectively improve the voltage spike and energy loss caused by transformer leakage,reduce the voltage stress of switching tube,realize ZVS,and effectively improve the efficiency and stability of power supply system.关键词
反激变换器/高频变压器/有源钳位/ACF/软开关/ZVS/无源钳位/漏感Key words
flyback converter/high-frequency transformer/active clamp/ACF/soft switching/ZVS/passive clamp/leakage inductor分类
电子信息工程引用本文复制引用
孙馗苡,王京梅..反激变换器有源钳位技术[J].电子科技,2025,38(5):76-82,7.基金项目
四川省科技计划重点研发项目(2022YFG0319) Key R&D Projects of Sichuan Provincial Science and Technology Programme(2022YFG0319) （2022YFG0319）
