基于交互式设计超材料建模与分析的MCR-WPT效率提升研究

doi:10.16183/j.cnki.jsjtu.2023.025

摘要/Abstract

摘要：

超材料具有特殊的磁场调控能力,被广泛关注并应用于磁耦合谐振无线电能传输(MCR-WPT)领域,但寻求针对特定领域目标需求的超材料设计具有挑战性.目前,超材料的一般设计方法为S参数反演法和等效电路法,设计流程通常需要多次建模仿真得到目标参数,该过程较为繁琐耗时.对此,深入分析上述两种设计方法的特性并将二者结合,采用HFSS与MATLAB软件交互设计和优化用于MCR-WPT特性提升的超材料,有效简化了超材料的设计过程.以无线电能传输效率优化为目标设计方形和Koch两种超材料单元,分析对比两种单元的电磁特性.搭建工作频率为6.78 MHz的MCR-WPT系统实验平台,探究两种超材料对传输效率的影响.实验结果表明,方形超材料和Koch超材料分别实现了28.4%和24.6%的最大传输效率提升,证明了交互设计可以更简便地设计超材料并且用于无线电能传输系统传输效率的提升.

关键词: 无线电能传输, 超材料, 分析和设计, 交互式仿真, 传输效率

Abstract:

Metamaterials have special magnetic field control capabilities as a matter of concern and have been applied in the field of magnetically-coupled resonant wireless power transfer (MCR-WPT). It is a challenging study topic to seek a metamaterial designed for the target needs of a specific field. The S-parameter retrieval method and equivalent circuit method have received wide attention as the commonly used design methods for metamaterials. The parameters of metamaterials are obtained by repeated simulations, this design process is time-consuming. In this paper, the characteristics of the above two design methods are analyzed and combined. The HFSS and MATLAB software are used to interactively design and optimize the metamaterials used for MCR-WPT characteristic improvement, which effectively simplifies the design process. Furthermore, the square and Koch metamaterial units are designed to optimize the efficiency, and the characteristics of the units are analyzed and compared. Finally, an experimental platform of 6.78 MHz MCR-WPT system is built to analyze the influences of metamaterials on efficiency. The experimental results show that the square metamaterial and Koch metamaterial achieve 28.4% and 24.6% of the maximum power transmission efficiency, respectively, which proves that interactive design can more conveniently design metamaterials and improve the transmission efficiency of the MCR-WPT system.

Key words: wireless power transfer (WPT), metamaterial, analysis and design, interactive simulation, power transmission efficiency

中图分类号:

TM724

范兴明, 张浩楠, 张鑫. 基于交互式设计超材料建模与分析的MCR-WPT效率提升研究[J]. 上海交通大学学报, 2024, 58(4): 545-554.

FAN Xingming, ZHANG Haonan, ZHANG Xin. MCR-WPT Efficiency Improvement Based on Metamaterial Interactive Modeling and Analysis[J]. Journal of Shanghai Jiao Tong University, 2024, 58(4): 545-554.

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分析方法	优点	缺点
等效电路法	适用于设计低频超材料、计算简便	计算结果存在误差、设计结构单一
S参数反演法	研究方法成熟	设计过程复杂

超材料单元	f₀/MHz	f_c/MHz	μ(f=f_c)
方形	6.24	6.78	-1+0.32i
Koch	6.40	6.78	-1+0.76i

类别	最高传输效率/%	最大提升效率/%	阈值/cm
原始系统	55.7	—	—
方形超材料	78.0	28.4	8
Koch超材料	74.2	24.6	10