Modeling and Experimental Validation of a Capacitive Link for Wireless Power Transfer to Biomedical Implants
Modeling and Experimental Validation of a Capacitive Link for Wireless Power Transfer to Biomedical Implants
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DOI：
10.1109/tcsii.2017.2737140
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发表时间：
2018-07-01
影响因子：
4.4
通讯作者：
Mohseni, Pedram
中科院分区：
文献类型：
--
作者：
Erfani, Reza;Marefat, Fatemeh;Mohseni, Pedram
这篇文章简要介绍了电容链路作为一种新兴的生物医学植入物无线功率传输策略的建模和实验验证。电容链路包括两对间隔L放置的涂覆的平行板，其中组织层充当介电材料。然后，通过将两个电感器与电容性链路串联来形成串联谐振结构。提出了一个全面的电路模型，该模型考虑了两对之间的组织所贡献的L相关、寄生、交叉耦合和纵向电阻元件。串联谐振电容链路还通过印刷电路板上的400 mm（2）电容垫来实现，这些电容垫涂有1 μ m厚的Parylene-N层，围绕5 mm厚的组织层对齐，并与两个串联放置100 μ H电感器，产生类似于115和127 kHz的谐振频率。在120 kHz的工作频率和从10 Ω到100 k Ω的负载电阻的宽范围内，从2 cm到无穷大测量L对传递到负载的功率和链路的功率传输效率参数的影响，并且示出与来自相关电路模型的仿真结果非常一致。
This brief reports on the modeling and experimental validation of a capacitive link as an emerging strategy for wireless power transfer to biomedical implants. The capacitive link comprises two pairs of coated parallel plates that are placed at a distance of L apart, with a tissue layer acting as the dielectric material. A series-resonant structure is then formed by placing two inductors in series with the capacitive link. A comprehensive circuit model is proposed that accounts for the L-dependent, parasitic, cross-coupled, and longitudinal resistive elements contributed by the tissue between the two pairs. The series-resonant capacitive link is also realized with 400-mm(2) capacitive pads on printed-circuit boards that are coated with a 1-mu m-thick layer of Parylene-N, aligned around a 5-mm-thick tissue layer, and placed in series with two 100-mu H inductors, resulting in resonance frequencies of similar to 115 and 127 kHz. At an operation frequency of 120 kHz and over a wide range of load resistance from 10 Omega to 100 k Omega, the effect of L on the power delivered to the load and power transfer efficiency parameters of the link is measured from 2 cm to infinity and shown to be in very good agreement with simulation results from the related circuit model.