不对称半桥反激变换器的设计  

Design on asymmetrical half-bridge flyback converter

作　　者：廖鸿飞[1] 梁奇峰[1] 熊宇[1] 

机构地区：[1]中山火炬职业技术学院电子工程系,广东中山5208436

出　　处：《现代电子技术》2015年第14期149-151,共3页Modern Electronics Technique

基　　金：中山市工业攻关项目:微型光伏并网逆变器的应用研究(20123A368)

摘　　要：为了提高充电器效率和简化电路结构,采用不对称半桥反激式变换器作为锂电池充电器的主电路,详细分析不对称半桥反激变换器的工作原理和软开关条件,给出主电路参数之间的关系式,并利用关系式设计150 W样机进行实验验证;实验结果表明,所有功率器件均实现了软开关。采用不对称半桥反激变换器设计的锂电池充电器具有结构简单,效率高,电磁干扰小的优点。In order to improve the efficiency and simplify the topology of the charger,the asymmetrical half-bridge flyback converter is adopted as the main circuit of lithium battery charger in this paper. The working principle,soft switching condition and the relationship between the main circuit parameters are analyzed. The 150 W charger prototype was built for verification. The test result shows that all of the power devices works at soft switching condition. The advantage of the lithium charger based on asymmetrical half-bridge flyback converter is simple,high efficient and low EMI.

关 键 词：不对称半桥 反激变换器 ZVS 软开关条件 

分 类 号：TN720-34[电子电信—电路与系统]