摘要
电磁超材料对磁共振式无线电能传输系统有增强效率和增大距离的作用,但应用于电动汽车的无线充电、便携设备的无线充电、高压线路监测等等场景时,电磁超材料放置于共振线圈的正中间存在着不便。文中研究紧贴无线电能传输系统接收线圈一侧的电磁超材料产生的增益效果,从线圈品质因数和互感两个方面入手,用有限元电磁仿真实验与实物测量对其进行验证。实验发现,将平面螺旋结构的电磁超材料贴近接收线圈放置时,负载电阻的功率增大为原来的4. 9倍,和已有文献中放正中间的情况比稍低,但在节省空间的前提下仍对无线电能传输系统有显著增益效果。
In order to improve the efficiency and increase the distance of the wireless power transfer system,the electromagnetic metamaterials were applied.However,it is inconvenient to place the electromagnetic metamaterials in the middle of resonant coils when it is applied in wireless charge of electric vehicles,portable device,and high voltage line monitoring and other scenarios.In this paper,the gain effect of the electromagnetic metamaterials when placed in the side of receiving coil is studied from two aspects of the coil quality factor and mutual inductance.The finite element electromagnetic simulation experiment and the physical measurement are used to verify it.It is found that when the electromagnetic metamaterial of planar spiral structure is placed close to the receiving coil,and the power of load resistance can be enhanced about 4.9 times.It’s slightly lower than placed in the middle of the coils,but still has a significant gain effect to wireless power transmission system.
作者
邓其军
范惠子
罗垚
Deng Qijun;Fan Huizi;Luo Yao(School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China;School of Electrical Engineering,Wuhan University,Wuhan 430072,China)
出处
《电测与仪表》
北大核心
2019年第7期1-6,共6页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(51507115)
关键词
无线电能传输
电磁超材料
负磁导率
wireless power transfer
electromagnetic metamaterial
negative permeability
