谐振方式对有源钳位反激变换器工作状态影响的研究  

Research on influence of resonant mode on working state of active clamped flyback converter

作　　者：赵永秀[1,2] 刘泽伟 朱治钢 晏铭 蔡培军 ZHAO Yongxiu;LIU Zewei;ZHU Zhigang;YAN Ming;CAI Peijun(College of Electrical and Control Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Xi’an Key Laboratory of Electrical Equipment Condition Monitoring and Power Supply Security,Xi’an 710054,China;Silergy Semiconductor Technology(Hangzhou)Co.,Ltd.,Hangzhou 310052,China)

机构地区：[1]西安科技大学电气与控制工程学院,陕西西安710054 [2]西安市电气设备状态监测与供电安全重点实验室,陕西西安710054 [3]矽力杰半导体技术(杭州)有限公司,浙江杭州310052

出　　处：《电工电能新技术》2024年第6期37-48,共12页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51777167、51604127)。

摘　　要：传统有源钳位反激变换器依赖变压器漏感和原边钳位电容之间的谐振实现软开关,消除了开关损耗,但传导损耗大,输出整流器存在电流振荡现象。为解决上述问题,选取变换器最佳工作模式,建立不同谐振方式下的等效电路模型,探究不同谐振方式对变换器性能的影响,以副边谐振方式为基础制作实验样机。由实验结果可知:副边谐振方式有源钳位反激变换器可实现功率器件软开关,降低原边电流有效值,消除副边电流振荡现象,所设计的变换器最大满载效率达94.06%,整机效率高于原边谐振方式。Traditional active clamp flyback converters rely on the resonance between the transformer leakage induct⁃ance and the primary side clamp capacitor to achieve soft switching,eliminating switching losses,but the conduc⁃tion loss is large,and the output rectifier has current oscillation.In order to solve the above problems,the best working mode of the converter is selected,the equivalent circuit model under different resonance modes is estab⁃lished,the influence of the resonance mode on the working state of the converter is analyzed in depth,and the ex⁃perimental prototype is made based on the secondary side resonance mode.The experimental results show that the secondary side resonant active clamp flyback converter can realize the soft switching of power devices,reduce the rms value of the primary current,eliminate the phenomenon of secondary side current oscillation,and the maximum full load efficiency of the designed converter reaches 94.06%,and the efficiency of the whole machine is higher than that of the primary side resonance mode.

关 键 词：有源钳位 软开关 副边谐振 电流振荡 

分 类 号：TM46[电气工程—电器]