磁耦合谐振式无线电能传输系统阻抗分析与匹配电路设计方法

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摘要针对无线电能传输系统中阻抗失配引起的效率低和烧毁射频功放等问题,综合考虑耦合因数、电源和线圈内阻,利用互感耦合理论对四线圈结构的磁耦合谐振式无线电能传输系统中射频功放的负载阻抗进行等效分析;并针对通过改变系统互感系数来调整阻抗难以达到理想效果的缺陷,提出和设计阻抗匹配电路方法来调整阻抗。根据阻抗特性设计了π 型结构的阻抗匹配电路,给出了系统器件参数的计算方法和结果。最后设计了基于磁耦合谐振技术的无线电能传输装置,并进行了阻抗匹配实验,实验结果与理论分析具有较好的一致性,证明了理论分析的正确性。也为进一步研究自适应阻抗匹配,提高无线电能传输功率和效率提供了有益的参考。

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关键词 ：磁耦合谐振, 无线电能传输, 阻抗特性, 匹配电路

Abstract：Impedance mismatch in wireless power transfer system may lead to the problems of low efficiency or burnout power amplifier. Taken the coupling factor, resistance of power and coil into account, this paper analyzed the power amplifier load impedance of four-coil model wireless power transfer system via coupled magnetic resonances, based on mutual inductance coupling theory. Since the impedance is difficult to achieve the ideal effect by changing the system mutual inductance, the impedance matching circuit was proposed and designed. Matching circuit of π type was designed, the calculating method and its results were given. In the end, the experiment device of wireless power transfer via coupled magnetic resonances was developed. Experimental results were consistent with the theoretical analysis. Thus it provides a useful reference for further studies on adaptive impedance matching and the improvement of the wireless power transfer power and efficiency.

Key words： Coupled magnetic resonances wireless power transfer impedance characteristic matching circuit

收稿日期: 2015-08-25 出版日期: 2016-12-02

PACS:

TM72

基金资助:国家自然科学基金（51577133、51207106、51477117、51307007、51307120）,天津市应用基础及前沿技术研究计划（自然科学基金）联合资助一般项目（15JCYBJC46700）和天津市科技支撑计划（15ZCZDGX00980）资助项目

作者简介: 李阳男,1979年生,博士,副教授,研究方向为无线电能传输理论与应用。E-mail:liyang@tjpu.edu.cn;闫卓男,1981年生,博士,副教授,研究方向为无线电能传输、电磁场数值计算。E-mail:yanzhuo@163.com（通信作者）

引用本文:

李阳, 张雅希, 闫卓, 杨庆新, 薛明, 张献. 磁耦合谐振式无线电能传输系统阻抗分析与匹配电路设计方法[J]. 电工技术学报, 2016, 31(22): 12-18. Li Yang, Zhang Yaxi, Yan Zhuo, Yang Qingxin, Xue Ming, Zhang Xian. Impedance Analysis and Design of Matching Circuit in Wireless Power Transfer System via Coupled Magnetic Resonances. Transactions of China Electrotechnical Society, 2016, 31(22): 12-18.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I22/12

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