Basic Analysis of Two-Coils Structure Based on Magnetically-Coupled Resonant Technology for SWIPT Application ∗
Basic Analysis of Two-Coils Structure Based on Magnetically-Coupled Resonant Technology for SWIPT Application ∗
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基于磁耦合谐振技术的两线圈结构的 SWIPT 应用的基本分析 *
DOI：
10.1049/cje.2015.10.031
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发表时间：
2015
影响因子：
1.2
通讯作者：
G. Wei
中科院分区：
文献类型：
--
作者：
Biyun Ma;Boheng Chen;S. Li;Yide Wang;G. Wei
本文利用磁耦合谐振（MCR）技术实现同步无线信息和电力传输（SWIPT）功能，即电力载波同时传输信息。分析了SWIPT系统的电路结构，证明了在小电阻情况下，存在两个功率效率最优的频率。讨论了线圈间距、线圈阻抗特性和负载等物理参数对两个最优频率的影响。这些结果提供了一种方法，以增加带宽的MCR技术，同时保持高的功率效率，实现SWIPT功能。仿真和实验结果验证了所提出的系统的可行性和获得的理论表达式。
The Magnetically-coupled resonant (MCR) technology is exploited in this paper to realize Synchronous wireless information and power transfer (SWIPT) function, which means that the power carriers also transmit information. The circuit structure of SWIPT system is analyzed and the existence of two optimal frequencies in power efficiency under small resistance circumstance is proved. The physical parameters having influences on the two optimal frequencies are discussed, such as the distance between coils, impedance characteristics of coils and loads. These results provide a way to increase the bandwidth of MCR technology, while maintaining high power efficiency to realize SWIPT function. Simulations and experimental results are presented to verify the feasibility of the proposed system and obtained theoretical expressions.