磁共振无线电能传输系统的共振频率分析  

Analysis of Resonant Frequency of Magnetic Resonance Wireless Power Transmission System

作　　者：徐栋[1] 王冬青[1] 程杰[1] 

机构地区：[1]青岛大学自动化与电气工程学院,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2017年第4期1-5,16,共6页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：国家自然科学基金资助项目(61573205);山东省自然科学基金资助项目(ZR2015FM017)

摘　　要：针对磁共振无线电能传输技术的广泛应用,本文在充分考虑线圈间耦合作用的情况下,建立了两线圈磁共振无线电能传输系统的电路模型。利用互感耦合理论对系统的共振频率进行分析,得出了系统两种共振频率表达式,即线圈自谐振下共振频率和耦合作用下共振频率,并推导出在两种共振频率下系统负载功率及传输效率表达式。通过对两种共振频率下负载功率及传输效率随耦合系数的变化情况进行分析,得出两种共振频率在不同耦合条件下的优劣性能。利用Multisim电路仿真软件建立电路模型的仿真电路,对系统进行仿真实验。仿真结果表明,耦合作用下,共振频率的理论值与仿真值基本相同,误差均在1%左右;而在两种不同耦合条件下,负载功率和传输效率的理论值与仿真值基本相同,误差均在0.1%以下。该研究为磁共振无线电能传输系统进一步提高负载功率和传输效率提供一定的理论依据。As the wide application of the magnetic resonance wireless power transmission technology, the circuit model of magnetic resonance wireless power transmission system was established in this paper, considering magnetic coupling between coils. The resonance frequency of the system is analyzed by the mutual inductance coupling theory, and the expressions of the two resonance frequencies are obtained, coils self-resonance fre-quency and the resonant frequency under magnetic coupling function between coils. The analytical expressions of load power and transmission efficiency in the two resonant frequencies are derived. By analyzing the variation of the load power and the transmission efficiency with the coupling coefficient for the two resonant frequencies, the performance of the two resonant frequencies under different coupling conditions is obtained. Mulitisim sim-ulation software was used to establish the artificial circuit of the circuit model. The results shows that the vari-ation law of transmission characteristics is consistent with that of theoretical analysis in different coupling con-ditions, and the error of theoretical values and simulation values is about 1 %. And with the two different reso-nance frequencies, the theoretical values of load power and transmission efficiency are largely the same as the simulation values, and the error is within 0. 1%. The research can provide the theoretical support and reference for the practical application of magnetic resonance wireless power transfer.

关 键 词：磁共振 无线电能传输 共振频率 负载功率 传输效率 

分 类 号：TM724[电气工程—电力系统及自动化]