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首页> 外文期刊>Applied Computational Electromagnetics Society journal >Near-Field Analysis and Design of Inductively-Coupled Wireless Power Transfer System in FEKO
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Near-Field Analysis and Design of Inductively-Coupled Wireless Power Transfer System in FEKO

机译：FEKO电感耦合无线功率传输系统的近场分析与设计

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摘要

Inductively-coupled wireless power transfer (WPT) system is broadly adopted for charging batteries of mobile devices and electric vehicles. The performance of the WPT system is sensitively dependent on the strength of electromagnetic coupling between the coils, compensating topologies, loads and airgap variation. This paper aims to present a comprehensive characteristic analysis for the design of the WPT system with a numerical simulation tool. The electromagnetic field solver FEKO is mainly used for studying high-frequency devices. However, the computational tool is also applicable for not only the analysis of the electromagnetic characteristic but also the identification of the electrical parameters in the WPT system operating in the near-field. In this paper, the self and mutual inductance of the wireless transfer windings over the various airgaps were inferred from the simulated S-parameter. Then, the formation of the magnetic coupling and the distribution of the magnetic fields between the coils in the series-parallel model were examined through the near-field analysis for recognizing the efficient performance of the WPT system. Lastly, it was clarified that the FEKO simulation results showed good agreement with the practical measurements. When the input voltage of 10 V was supplied into the transmitting unit of the prototype, the power of 5.31 W is delivered with the transferring efficiency of 97.79% in FEKO. The actual measurements indicated 95.68% transferring efficiency. The electrical parameters; V-in, V-out, Z(in), theta, I-in, and I-out, had a fair agreement with the FEKO results, and they are under 8.4% of error.
机译：感应耦合无线功率传输（WPT）系统被广泛用于为移动设备和电动汽车的电池充电。 WPT系统的性能敏感地取决于线圈之间电磁耦合的强度，补偿拓扑结构，负载和气隙变化。本文旨在通过数值仿真工具对WPT系统的设计进行全面的特性分析。电磁场求解器FEKO主要用于研究高频设备。但是，该计算工具不仅适用于电磁特性的分析，还适用于在近场操作的WPT系统中的电参数的识别。在本文中，通过模拟的S参数可以推断出无线传输绕组在各种气隙上的自感和互感。然后，通过近场分析检查了WPT系统的高效性能，研究了串并联模型中磁耦合的形成和线圈之间的磁场分布。最后，澄清了FEKO仿真结果与实际测量结果吻合良好。当向原型机的发射单元提供10 V的输入电压时，以FEKO的97.79％的传输效率传输了5.31 W的功率。实际测量表明转移效率为95.68％。电气参数; V-in，V-out，Z（in），theta，I-in和I-out与FEKO结果具有合理的一致性，并且误差在8.4％以下。

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