Transcutaneous capacitive wireless power transfer (C-WPT) for biomedical implants
Transcutaneous capacitive wireless power transfer (C-WPT) for biomedical implants
复制标题
用于生物医学植入物的经皮电容式无线电力传输 (C-WPT)
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
P. Mohseni
中科院分区：
文献类型：
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作者：
R. Erfani;Fatemeh Marefat;A. M. Sodagar;P. Mohseni
本文报告了一种用于生物医学植入物的经皮电容式无线功率传输（C-WPT）策略的实现。该方法基于串联谐振转换器，其中槽路电容器被替换为电容性链路，该电容性链路包括作为介电材料在组织周围对准的两对涂覆的平行板。开发了小型化印刷电路板，其在发射器（TX）和接收器（RX）板的正面上包含所有必需的电路，以及在板的背面上包含400 mm 2聚对二甲苯-N涂层垫。两个100μH电感串联在容性环节上，测得两个串联谐振回路的谐振频率均为151 kHz。该系统被设计为在零电压开关（ZVS）机制下在210 kHz谐振以上工作，以最大限度地减少开关导通损耗并提高功率传输效率（PTE）。在实验验证中，通过5 mm厚的肩肉向植入物（次级）侧输送1000 - 290 mW，测得PTE> 31%。当从外部（初级）侧的11 V直流电源提供105.5mW功率时，也测得峰值PTE为1038.4%。
This paper reports on the implementation of a transcutaneous capacitive wireless power transfer (C-WPT) strategy for biomedical implants. The approach is based upon a series resonant converter in which the tank capacitors are replaced with a capacitive link comprising two pairs of coated parallel plates aligned around the tissue as the dielectric material. Miniaturized printed-circuit boards are developed that incorporate all requisite circuitry on the front-side of transmitter (TX) and receiver (RX) plates, as well as 400mm2 Parylene-N-coated pads on the back-side of the plates. With two 100μH inductors in series with the capacitive link, a resonance frequency of ∼151kHz is measured for both series resonant tanks. The system is designed to operate above resonance at 210kHz in zero-voltage switching (ZVS) regime to minimize switch conduction losses and increase the power transfer efficiency (PTE). In experimental verification, ∼ 59 to 290mW is delivered to the implant (secondary) side through 5mm-thick shoulder beef with measured PTE of >31%. A peak PTE of ∼38.4% is also measured when delivering 105.5mW from a dc source of 11V on the external (primary) side.