一种基于阻抗的LC-DAB的设计方法  

An Impedance-based Design Method for LC-DAB

作　　者：袁政 陈亮 屈稳太[1,2] YUAN Zheng;CHEN Liang;QU Wentai(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;School of Information Science and Engineering,NingboTech University,Ningbo 315100,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]浙大宁波理工学院信息科学与工程学院,浙江宁波315100

出　　处：《电工技术》2025年第3期56-59,共4页Electric Engineering

基　　金：宁波科技创新2025重大专项(编号2019B10080)。

摘　　要：双主动全桥(DAB)作为一种宽电压变比、高功率密度、电气隔离的双向DC-DC变换器,常用于光伏储能、电动汽车等领域。DAB入端电流纹波较大,往往通过联级LC低通滤波器来减少入端电流纹波,但LC低通滤波器的引入常会带来系统稳定性问题。为此,提出采用LC低通滤波器输出阻抗和DAB输入阻抗联合建模方法,设计合适的LC低通滤波器。通过对比加入LC低通滤波器前后电源输出电流,得到电流纹波减少了25%,验证了所设计LC低通滤波器对电流纹波的抑制作用。The dual active bridge(DAB)is used as a wide voltage ratio,electrically isolated,high power density bidirectional DC-DC converter in various fields.An LC filter is usually cascaded at the inlet end of the DAB to reduce the input current ripple,but also brings stability problems of cascaded system.To solve the stability problem of LC-DAB,the method of the output impedance of the LC filter and the input impedance of the DAB is adopted to design a suitable LC filter.By comparing the output current of the power supply before and after adding an LC filter,it was found that the current ripple was reduced by 25%,verifying the inhibitory effect of the designed LC filter on current ripple.

关 键 词：双主动全桥 阻抗模型 LC低通滤波器 

分 类 号：TM46[电气工程—电器]