| 李中启,甘子玥,任立权,孔彭生,熊鑫博,程宇,周鑫.无线电能传输系统高效率低漏磁的全向环绕型[J].电子测量与仪器学报,2024,38(1):94-105 |
| 无线电能传输系统高效率低漏磁的全向环绕型 |
| Omni-directional wrap-around active magnetic shield structure with highefficiency and low magnetic leakage for wireless power transfer systems |
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| DOI： |
| 中文关键词: 电动汽车 无线电能传输 电磁屏蔽 电磁兼容 电磁场 |
| 英文关键词:electric vehicle wireless power transmission electromagnetic shielding electromagnetic compatibility electromagnetic field |
| 基金项目:国家重点研发计划项目(2022YFB3403200)、湖南省自然科学基金(2022JJ30226)、湖南省教育厅重点项目（23A0432）资助 |
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| Author | Institution |
| Li Zhongqi | 1.College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China;
2.College of Electrical and Information Engineering, Hunan University, Changsha 410082, China |
| Gan Ziyue | College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China |
| Ren Liquan | College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China |
| Kong Pengsheng | College of Railway Transportation, Hunan University of Technology, Zhuzhou 412007, China |
| Xiong Xinbo | College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China |
| Cheng Yu | College of Railway Transportation, Hunan University of Technology, Zhuzhou 412007, China |
| Zhou Xin | College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China |
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| 中文摘要: |
| 在电动汽车无线电能传输系统（WPT）中，如何通过电磁屏蔽技术来降低WPT系统中的漏磁，同时维持较高的传输效率是一个难题。为此本文提出了一种全向环绕型有源磁屏蔽线圈结构来减少WPT系统中的漏磁。首先，分析了该结构的磁屏蔽工作原理以及设计思路，推导了该结构的数学模型；其次，根据本文线圈结构高效率低漏磁的特点，提出了一种线圈优化方法，得到了满足设计要求的线圈参数；最后，根据得到的线圈参数，搭建了一套基于所提线圈结构的WPT系统，并通过仿真和实验验证了该结构和方法的合理性。结果显示，在传输功率为4 kW时，本文提出的线圈结构在偏移0 cm时，目标面的最大漏磁为3.76 μT，相比无屏蔽线圈结构降低了43.63%的漏磁，并且传输效率高达95.58%；在偏移10 cm时目标面的最大漏磁为6.03 μT，仍符合漏磁安全标准，并且传输效率为92.92%，高于同尺寸无源屏蔽线圈结构和传统有源屏蔽线圈结构的传输效率。 |
| 英文摘要: |
| In the wireless power transfer (WPT) system of electric vehicles, it is a difficult problem to reduce the magnetic leakage and maintaining a high transmission efficiency through electromagnetic shielding technology. In this paper, an omni-directional wrap-around active magnetic shielding coil structure is proposed to reduce the magnetic leakage in the WPT system. First, the magnetic shielding principles and design rationale of this structure are analyzed, and the mathematical model of the structure is derived. Secondly, a method of coil optimization is proposed according to the high efficiency and low magnetic leakage characteristics of the coil structure, and the coil parameters to meet the design requirements are obtained. Finally, based on the obtained coil parameters, a WPT system based on the proposed structure is constructed, the reasonableness of the structure and method is verified by simulation and experiment. The results show that, the maximum magnetic leakage of the target surface is 3.76 μT at a transmission power of 4 kW when the proposed structure is offset by 0 cm, which represents a 43.63% reduction compared to an unshielded structure, and the transmission efficiency is as high as 95.58%. At the offset of 10 cm, the maximum magnetic leakage on target surface is 6.03 μT, which still complying with the magnetic leakage safety standards. And the transmission efficiency is 92.92%, which is higher than the same-sized passive shielded structures and traditional active shielded structures. |
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