高效全桥LLC谐振变换器混合控制研究  

Research on hybrid control of a high efficiency full-bridge LLC resonant converter

作　　者：张忠成 梁喆[1] ZHANG Zhongcheng;LIANG Zhe(School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《邵阳学院学报（自然科学版）》2021年第4期24-33,共10页Journal of Shaoyang University：Natural Science Edition

基　　金：国家自然科学基金项目(61873004);安徽省科技重大专项(201903a07020013);国网公司科学技术项目(SGAHDK00DJJS1900077)。

摘　　要：为了优化电荷控制下全桥LLC谐振变换器的效率,提出一种将电荷控制与间歇控制相结合的混合控制。首先,分析了电荷控制与间歇控制的控制原理,然后,根据间歇控制最大输出功率选取切换点,最后,设计了混合控制方法,使LLC谐振变换器能够在重载和轻载下分别工作在电荷控制和间歇控制。通过PSIM软件对混合控制方法进行了仿真验证,结果表明混合控制相比单一电荷控制总体效率提升了2.5%。In order to optimize the efficiency of full-bridge LLC resonant converter under charge control,a hybrid control method combining charge control with burst control was proposed.Firstly,the principles of charge control and burst control were analyzed,and then the switching point was selected according to the maximum output power of burst control.Finally,a hybrid control method was designed to make LLC resonant converter work in charge control and burst control under heavy load and light load respectively.The hybrid control method was simulated and verified with PSIM software,and the results showed that the overall efficiency of hybrid control was 2.5%higher than that of single charge control.

关 键 词：电荷控制 间歇控制 混合控制 全桥LLC谐振变换器 

分 类 号：TM461[电气工程—电器] TM464