基于耦合滤波电感的电流源型双有源桥式直流变换器的研究  

Study on Current-fed Dual-active-bridge DC-DC Converter Based on Coupling Filter Inductance

作　　者：赖臻 曾君[1] 刘俊峰[2] LAI Zhen;ZENG Jun;LIU Junfeng(School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China;School of Automation Science and Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学电力学院,广州510640 [2]华南理工大学自动化科学与工程学院,广州510640

出　　处：《电源学报》2025年第2期11-20,共10页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51877085,62173148);广州市科技计划科学研究专项资助项目(202002030373)。

摘　　要：应用于储能系统的电流源型双有源桥式变换器往往存在电流应力大、软开关范围受限等问题,限制了变换器的效率和功率密度。针对此问题,结合耦合电感技术,提出1种储能侧电流纹波小且软开关范围宽的电流源型双有源桥式变换器。变换器的储能侧由2个并联的电流源型全桥构成,可有效减小储能侧开关管的电流应力。通过调节储能侧并联全桥间的移相,可减小储能侧电流纹波;通过合理设计耦合滤波电感,得到足够大的互感电流以满足开关管的软开关条件。详细介绍了变换器的工作原理和稳态分析,并设计了400W的实验样机,实验结果进一步验证了所提变换器的优越性和可行性。In an energy storage system,the current-fed dual-active-bridge converter has a large current stress and the corresponding soft-switching range is limited,which limits the converter’s efficiency and power density.To solve these problems,combined with the coupled inductor technology,a current-fed dual-active-bridge converter with a low current ripple on the energy storage side and a wide soft-switching range is proposed.Two current-fed full bridges are connected in parallel on the energy storage side,thus effectively reducing the current stress of switches therein.By adjusting the phase shift angle between the two parallel full bridges on the energy storage side,the current ripple is reduced.By reasonably designing the coupling filter inductance,the obtained mutual inductance current is large enough to satisfy the soft-switching conditions for switches.The working principle and steady-state analysis of the converter were given in detail,and a 400 W experimental prototype was designed to verify the superiority and feasibility of the proposed converter.

关 键 词：双有源桥式变换器 耦合电感 交错技术 软开关 

分 类 号：TM46[电气工程—电器]