基于曲面柔性线圈的无线充电系统曲率角分裂抑制与性能优化

doi:10.19595/j.cnki.1000-6753.tces.191541

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摘要曲面柔性接收线圈可以很好地贴合柱形物体,如肢体、电机、导弹、火箭等,其结构特性扩展了无线电能传输技术在可穿戴设备以及其他民用或军用领域的应用。为提高不同穿戴人群或应用场合下设备无线充电的性能,该文通过理论计算、仿真和实验分析,研究曲面线圈接收的磁链与曲率角、收发线圈参数之间的关系,量化曲率角分裂发生的条件,探寻曲率变化时收发线圈的最佳参数。结果表明,通过保持线圈间适当的距离并且避免曲率角分裂的发生可以在很大程度上弱化线圈曲率变化引起的无线充电性能下降。同时,优化线圈参数让系统工作在临界分裂状态,可使系统获得最优的功率输出并保持不同弯曲程度下传输功率的稳定性。实验中通过优化设计的接收线圈在50°~130°范围内弯曲时,电流变化率最大值仅为4.3%。

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	闻枫
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关键词 ：无线电能传输, 曲面柔性线圈, 曲率角分裂, 空间磁场计算, 传输功率稳定

Abstract：Curved flexible coils can fit well with cylindrical structures such as human body, electric machine, missiles, rockets, etc., which expands the application of wireless power transfer technology in wearable devices and in other civilian or military fields. In order to improve the performance of wireless charging of devices in different wearers or applications. This paper studied the relationship between received magnetic flux linkage by curved coil, the curvature angle and the parameters of transmitter and receiver coils through theoretical calculation, simulation and experimental analysis, quantified the conditions under which curvature angle split occurs, and explored the optimal parameters of transmitter and receiver coils when the curvature changes. The results show that by maintaining an appropriate distance between two coils and avoiding curvature angle split, the degradation of wireless charging performance caused by changes in coil curvature can be greatly weakened. At the same time, by optimizing coil parameters to make system work in a critical split state, the system can obtain the optimal output power and maintain the stability of transmitted power under different bending degrees. Experimental results show that when the optimally designed receiver coil is bent in the range of 50° to 130°, the maximum current change rate is only 4.3%.

Key words： Wireless power transfer curved flexible coil curvature angle split magnetic field calculation stable transmission power

收稿日期: 2019-11-19

PACS:

TM724

基金资助:中国博士后科学基金(2020M671498)、江苏省博士后科研资助计划(2020Z374)、江苏省自然科学基金(BK20180485)、中央高校基本科研业务费专项资金(30919011241)和国网江苏省电力有限公司科技(J2020135,SGJSJX00BGJS2002373)资助项目

通讯作者: 闻枫男,1990年生,博士,讲师,研究方向为无线电能传输。E-mail:wen@njust.edu.cn

作者简介: 荆凡胜男,1996年生,硕士研究生,研究方向为植入式与穿戴式设备的无线供电。E-mail:Jingly@njust.edu.cn

引用本文:

闻枫, 荆凡胜, 李强, 王韬, 楚晓虎. 基于曲面柔性线圈的无线充电系统曲率角分裂抑制与性能优化[J]. 电工技术学报, 2020, 35(zk2): 346-354. Wen Feng, Jing Fansheng, Li Qiang, Wang Tao, Chu Xiaohu. Curvature Angle Split Suppression and Performance Optimization of Wireless Charging System Based on Curved Flexible Coil. Transactions of China Electrotechnical Society, 2020, 35(zk2): 346-354.

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