Multi-coil high efficiency wireless power transfer system against misalignment
Multi-coil high efficiency wireless power transfer system against misalignment
复制标题
多线圈高效无线电力传输系统，防止错位
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Jiafeng Zhou
中科院分区：
文献类型：
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作者：
Chen Xu;Y. Zhuang;Hongjian Han;Chaoyun Song;Yi Huang;Jiafeng Zhou
磁共振耦合无线功率传输（WPT）系统的功率传输效率对线圈的对准敏感。本文提出了一种新型的多线圈WPT系统，以提高功率传输效率。它可以克服未对准问题并保持高的功率传输效率。所提出的线圈回路结构可以在Tx和Rx线圈之间提供强磁共振耦合。该系统采用了四个叠层谐振器，并证明了至少一对耦合谐振器在多个失调条件下可以在失调距离上实现高的功率传输效率。实验结果表明，所提出的多回路WPT系统可以达到90.2%的峰值效率时，线圈是很好的对齐。同时，该WPT系统在从0到55 mm的失准距离（约为Rx板长度的66%）上保持超过70%的效率。所提出的WPT系统可用于生物医学保健和治疗的植入设备或电动汽车充电系统。
The power transfer efficiency of magnetic-resonance coupled wireless power transfer (WPT) systems is sensitive to the alignment of coils. In this paper, a novel multi-coil WPT system is proposed to enhance power transfer efficiency. It can overcome the misalignment problem and maintain high power transfer efficiency. The proposed coil loop structure can provide a strong magnetic resonance coupling between the Tx and Rx coils. There are four induvial resonators applied in the system and it demonstrates that at least a pair of coupled resonators in several misaligned conditions could realize high power transfer efficiency over a misaligned distance. The experimental results show that the proposed multi-loop WPT system can achieve 90.2% peak efficiency when the coils are well aligned. Mean-while, this WPT system maintains over 70% efficiency over a misalignment distance from 0 to 55 mm, which is about 66% of the length of the Rx board. The proposed WPT system could be used either in implant devices for biomedical healthcare and treatment or for electric vehicles charging systems.