Accurate Modeling of Coil Inductance for Near-Field Wireless Power Transfer
Accurate Modeling of Coil Inductance for Near-Field Wireless Power Transfer
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DOI：
10.1109/tmtt.2018.2854190
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发表时间：
2018-07
影响因子：
4.3
通讯作者：
Sadeque Reza Khan;S. Pavuluri;M. Desmulliez
中科院分区：
文献类型：
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作者：
Sadeque Reza Khan;S. Pavuluri;M. Desmulliez
本文提出了近场无线电能传输系统中圆形绕线线圈自感和互感的封闭形式表达式。线圈的半径的计算，灵感来自阿基米德螺旋在许多生物有机体中发现的，是用来模拟单和多层螺旋线圈的自感。互感的值是通过表达的泰勒展开的诺伊曼积分恒定载流导线。还推导出了未对准磁耦合线圈的互感公式，从而能够快速而准确地计算实际应用中的功率传输效率。使用三维电磁软件包麦克斯韦3D计算的自感和互感值，这些值表现出良好的协议相比，所提出的模型。不同的几何配置的WWCs已被制造实验验证所提出的模型的准确性。分析和实验结果的比较表明，所提出的模型能够准确地预测自感和互耦迅速。所提出的建模为近场无线功率传输链路的时间有效优化铺平了道路。
This paper presents closed form expressions for self-inductance and mutual inductance of circular wire-wound coils (WWCs) used in near-field wireless power transfer systems. The calculation of the radius of the coils, inspired from the Archimedean spiral found in many biological organisms, is used to model the self-inductance of single- and multilayer spiral coils. The value of the mutual inductance is determined by expressing the Taylor expansion of Neumann’s integral for constant current-carrying wires. Formulas for the mutual inductance are also derived for misaligned magnetically coupled coils enabling the rapid but accurate calculation of power transfer efficiency in real-life applications. Self-inductance and mutual inductance values are computed using the 3-D electromagnetic software package Maxwell 3D, and these values demonstrate excellent agreement compared with the proposed models. WWCs of different geometrical configurations have been manufactured to validate experimentally the accuracy of the proposed models. Comparison of analytical and experimental results indicates that the proposed models are capable to accurately predict the self-inductance and mutual coupling rapidly. The proposed modeling paves the way for the time efficient optimization of near-field wireless power transfer links.