Design of DD Coil With High Misalignment Tolerance and Low EMF Emissions for Wireless Electric Vehicle Charging Systems
Design of DD Coil With High Misalignment Tolerance and Low EMF Emissions for Wireless Electric Vehicle Charging Systems
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用于无线电动汽车充电系统的具有高错位容差和低 EMF 辐射的 DD 线圈设计
DOI：
10.1109/tpel.2020.2971967
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发表时间：
2020-02
影响因子：
6.7
通讯作者：
Chunbo Zhu
中科院分区：
文献类型：
--
作者：
Kai Song;Guang Yang;Yu Guo;Yu Lan;Shuai Dong;Jinhai Jiang;Chunbo Zhu
本文提出了一种针对高失调容限的双D线圈设计方法，并考虑了系统的电磁场屏蔽。受汽车工程师协会J2954标准中推荐的DD线圈的启发，分别设计了发射（Tx）线圈和接收（Rx）线圈的新颖结构。首先，介绍了标准DD线圈作为参考。其次，对于Tx线圈，详细研究了诸如长度、宽度和覆盖范围等参数。对于Rx线圈，优化了边缘重叠的线圈结构。目的是在最大偏移处获得更高的耦合系数。第三，考虑到电磁场辐射超过限值，在Tx线圈中提出了E形磁芯的中心凹陷线圈结构。在额定输出功率下，电磁辐射可降低到27 μT以下。最后，建立了一个6.6千瓦的实验系统，其最大传动效率高于94%。实验结果表明，该结构有利于保持较高的耦合系数对抗失调和抑制电动势发射。
In this article, a design method of the double-D (DD) coil aiming at high misalignment tolerance is proposed, and the electromagnetic field (EMF) shielding of the system is considered. Inspired by the DD coil recommended in the standard J2954 published by the Society of Automotive Engineers, the novel structures of the transmitting (Tx) coil and the receiving (Rx) coil are designed, respectively. First, the standard DD coil is introduced as a reference. Second, for the Tx coil, the parameters, such as length, width, and coverage, are investigated in detail. For the Rx coil, the coil structure overlapped in the edge is optimized. The purpose is to obtain a higher coupling coefficient at the maximum offset. Third, considering EMF emissions exceeding the limit, the structure of the central-depressed coil with E-shaped cores is proposed in the Tx coil. The EMF emissions can be reduced to less than 27 μT at the rated output power. Finally, a 6.6–kW experimental system of which the maximum transmission efficiency is higher than 94% is set up. The experimental results prove that the proposed structure is beneficial to maintain a higher coupling coefficient against misalignment and suppress EMF emissions.
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发表时间：
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