摘要
针对在磁耦合谐振式无线电能传输系统中角度偏转是否会对接收电能产生影响的问题,首先利用空间两空心线圈的互感耦合理论和等效电路分析无线电能传输系统的频率特性,得到归一化电压的频率响应曲线和电能无线传输的必要条件。然后根据空间任意放置的空心线圈的耦合系数与方向的关系分析方向改变对耦合因数的影响,提出系统在过耦合、临界耦合和欠耦合三种状态下的方向特性。最后,设计了实验电路并进行了相关的实验研究,实验结果与理论分析具有较好的一致性,验证了无线电能传输系统中方向性的问题。本文关于方向性的分析为移动设备的无线电能传输系统设计和参数优化提供有益的参考。
In order to confirm whether the angle deflection will influence the power of receiver coils in wireless power transfer system, the characteristic of orientation in wireless power transfer system is analyzed by the coupling model of two spatial isolated coils and its equivalent circuit firstly, and then yielded the frequency response curve of normalized voltage in the receiver coils and necessary condition for wireless power transfer. Characteristic of orientation in the case of overcoupling, critical coupling and undercoupling was presented after the effect to coupling factor is analyzed by orientation deflection according to the relationship between the coupling coefficient of two spatial isolated coils and orientation. In the end, experiment circuit is designed and experimental results are well consistent with the theoretical analysis, which shows the correctness of the proposed method and its result. Thus provides an useful reference for the design of wireless power transfer system for mobile device and its parameters optimization.
出处
《电工技术学报》
EI
CSCD
北大核心
2014年第2期197-203,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(50977062
51207106
51207150)
天津市高等学校科技发展基金计划(20110411)资助项目
关键词
无线电能传输
磁耦合谐振
耦合因数
方向性
Wireless power transfer
coupled magnetic resonances
coupled factor
characteristic of orientation
作者简介
李阳 男，1979年生，博士，讲师，研究方向为无线电能传输理论与应用。
杨庆新 男，1961年生，博士，教授，博士生导师，研究方向为工程电磁场与磁技术。
