摘要
建立了基于中继线圈结构的磁耦合共振无线能量传输系统的等效电路模型,分析并推导出了无线能量传输效率表达式。在等效电路模型的基础上,理论分析了中继线圈的位置对于无线能量传输系统的影响以及无线能量传输系统各个传输线圈间的能量流动。根据理论分析,仿真并制作了的五线圈结构的磁耦合共振无线能量传输系统。仿真与实验表明,当中继线圈位于发射线圈与接收线圈的正中间时,无线能量传输效率最高可达81%。而当中继线圈偏离发射线圈与接收线圈的正中间时,传输效率会随着偏移距离的增大而降低;对比无中继线圈的无线能量传输系统,当无线能量传输系统引入中继线圈后,无线能量传输系统最高效率对应的传输距离由100mm增加到160mm,传输效率为40%对应的传输距离由140mm增加到300mm。仿真实验结果与理论分析相一致。
An equivalent circuit model of magnetic coupling resonance wireless energy transmission system based on relay coil structure is established,and the expression of wireless power transmission efficiency is analyzed and derived.Based on the equivalent circuit model,the influence of the position of the relay coil on the wireless power transmission system and the power flow between the individual transmission coils of the wireless power transmission system are theoretically analyzed.According to theoretical analysis,the five-coil structure magnetically coupled resonance wireless power transmission system is simulated and designed.Simulation and experiments show that when the relay coil is located in the middle of the transmitting coil and the receiving coil,the wireless power transmission efficiency can reach up to 81%.When the relay coil deviates from the middle of the transmitting coil and the receiving coil,the transmission efficiency is rapidly reduced.After introducing the relay coil,the distance of the wireless power transmission system to transmit power with the highest efficiency is increased from 100 mm to 160 mm,and the transmission distance corresponding to 40%transmission efficiency is increased from 140 mm to 300 mm.The simulation and experiment results are consistent with the theoretical analysis.
作者
胥云飞
沈文辉
王玮
Xu Yunfei;Shen Wenhui;Wang Wei(School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China)
出处
《电子测量技术》
2019年第17期16-22,共7页
Electronic Measurement Technology
关键词
无线能量传输
磁耦合共振
中继线圈
传输效率
wireless power transfer
magnetic coupling resonant
relay coil
transmission efficiency
