考虑非纯阻性负载阻抗匹配的无线充电系统  

A wireless charging system considering impedance matching of non-pure resistive loads

作　　者：彭思敏 徐德发[1] 吴铁洲 汪合林[3] 阚加荣 张慧成[1] PENG Simin;XU Defa;WU Tiezhou;WANG Helin;KAN Jiarong;ZHANG Huicheng(College of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan 430068,China;School of Electrical Engineering,Yancheng Institute of Technology,Yancheng 224051,China;Jiangsu Huacheng Technology Co.,Ltd.,Taizhou 225444,China)

机构地区：[1]湖北工业大学电气与电子工程学院,湖北武汉430068 [2]盐城工学院电气工程学院,江苏盐城224051 [3]江苏华骋科技有限公司,江苏泰州[KG2]225444

出　　处：《广西大学学报（自然科学版）》2023年第1期103-113,共11页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金项目(51577164);江苏高校“青蓝工程”项目(2021-11);盐城工学院校级科研项目(xjr2021052)。

摘　　要：为了提高电能传输效率,提出一种基于动态电容和Boost-Buck变换器的无线充电非纯阻性负载阻抗匹配的方法。可根据负载变化来改变电容和Boost-Buck变换器开关管占空比,分别补偿负载的虚部与实部,从而达到最佳阻抗点以提高系统传输效率。在MATLAB/Simulink环境下搭建系统仿真模型,并建立系统实验平台。仿真与实验结果表明,当接不同性质负载时,所提出阻抗匹配方法的系统传输效率都比未进行阻抗匹配时的高,最大系统传输效率可达83.14%,比无阻抗匹配提升了3.21%。同时,在等效阻抗为18~35Ω时,系统传输效率均保持在80%以上,具有阻抗匹配范围大的性能。To increase the power transmission efficiency of wireless charging system,anon-pure resistive load impedance matching method based on a dynamic capacitor and a Boost Buck converter was presented.The capacitance and the duty ratio of the Boost Buck converter was controlled to follow the resistance variation when the batteries were charging by the presented method.By compensating the imaginary and real part of the impedance load,the optimal impedance point was achieved and the power transmission efficiency of the wireless charging system was improved.To verify the effectiveness of the presented method,a simulation model in the MATLAB/Simulink environment and an experimental platform were built.The simulation and experimental results show that the system transmission efficiency using the proposed method is improved under different loads conditions compared to no impedance matching.The maximum transmission efficiency of the system using the presented method can reach 83.14%,which is 3.21%higher than the system with no impedance matching.Moreover,the system transmission efficiency can achieve above 80%when the equivalent impedance changes from 18Ωto 35Ω.It indicates that the impedances variation of a wireless charging system can be well followed and matched using the proposed method even in a wide range of impedance variation.

关 键 词：无线电能传输 阻抗匹配 开关电容组 传输效率 

分 类 号：TM724[电气工程—电力系统及自动化]