摘 要：线圈设计是磁谐振无线能量传输（WPT）系统设计的核心，同时也被广泛应用到 WPT 系统磁屏蔽设计方案中。基于印刷螺旋线圈（PSC），文章提出了一种新型双层非连接螺旋线圈结构，采用等效电路法（ECM）与有限元法（FEM）对其谐振频率进行分析。结果表明该类结构无须使用额外电容元件即可产生谐振，且通过绕向不同大大降低线圈的自谐振频率，设计简单，结构紧凑且成本低。将所提线圈用于谐振式 WPT 系统磁屏蔽应用中，获得了良好的屏蔽性能。
关键词：谐振 WPT 系统；双层非连接线圈设计；印刷螺旋线圈；磁屏蔽；等效电路
DOI:10.19850/j.cnki.2096-4706.2022.03.013
基金项目：国家自然科学基金（61877041）
中图分类号：TN03 文献标识码：A 文章编号：2096-4706（2022）03-0049-05
Design of Unconnected Double-Layer Printed Spiral Coil and Its Application in Magnetic Shielding of WPT System
GU Zhiyuan, MOU Xiangyong, ZHAO Xiang, YAN Liping
(College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China)
Abstract: Design of coil is the core of magnetic resonant wireless power transfer (WPT) system, and it is also widely used in the design scheme of magnetic shielding in WPT system at the same time. Based on the printed spiral coil (PSC), this paper proposes a new unconnected double-layer printed spiral coil structure, and analyzes the resonant frequency by using equivalent circuit model (ECM) and finite element method (FEM). The results show that this kind of structure can produce resonance without using additional capacitance elements, and greatly reduce the coil self-resonance frequency by different winding direction. And the design is simple, the structure is compact and the cost is low. The proposed coil is used in the magnetic shielding application of the resonant WPT system, and it obtains good shielding performance.
Keywords: resonant WPT system; unconnected double-layer coil design; PSC; magnetic shielding; equivalent circuit
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作者简介：谷智渊（1997.06—），男，汉族，河南南阳人，硕士研究生在读，研究方向：无线充电系统及其电磁兼容设计。