基于准Z源变换的无线充电系统电磁屏蔽研究  

Study on Electromagnetic Shielding of Wireless Charging System Based on Quasi-Z-Source Transformation

作　　者：张学毅[1] 张赛 易文静 任立权 李斌 ZHANG Xue-yi;ZHANG Sai;YI Wen-jing;REN Li-quan;LI Bin(College of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412000,China)

机构地区：[1]湖南工业大学电气与信息工程学院,湖南株洲412000

出　　处：《电工电气》2024年第4期10-16,共7页Electrotechnics Electric

基　　金：国家重点研发计划项目(2022YFB3403200);湖南省自然科学基金项目(2022JJ30226)。

摘　　要：在无线电能传输系统中,线圈结构参数对系统的传输效率以及漏磁影响很大,且对于传统桥式逆变电路,其提供的电压只能是母线电压以下,极大限制了输出功率能力以及调压能力。以有源磁屏蔽结构为基础,提出了一种基于准Z源逆变的有源屏蔽线圈结构,通过多目标粒子群算法分析了在低漏磁和高传输效率的双目标下的线圈结构参数;根据得到的线圈参数,研制了一套基于准Z源逆变的有源屏蔽线圈结构的无线充电系统。经MATLAB/Simulink仿真表明,在输出功率恒定为3.7 kW时,系统传输效率能够达到98.5%,优化后的漏磁相比于优化前下降了55.1%。In wireless energy transmission systems,the coil structure parameters have a great impact on the transmission efficiency and magnetic leakage of the system,and for traditional bridge inverter circuits the provided voltage can only be below the bus voltage,which greatly limits the output power capability and voltage regulation capability.In this paper,based on the active magnetic shielding structure,an active shielded coil structure based on quasi-Z-source inverter is proposed,and the coil structure parameters under the dual targets of low magnetic leakage and high transmission efficiency are analyzed by multi-objective particle swarm optimization algorithm.According to the obtained coil parameters,a wireless charging system based on the active shielded coil structure of quasi-Z-source inverter was developed.The system is simulated by MATLAB/Simulink,and the system transmission efficiency is able to reach 98.5%at a constant output power of 3.7 kW and the optimized magnetic leakage is reduced by 55.1%compared with the pre-optimization.

关 键 词：电动汽车 准Z源 电磁屏蔽 多目标粒子群算法 

分 类 号：TM724[电气工程—电力系统及自动化]