Evaluation of High-Frequency Leakage Current from Air-Core Transcutaneous Energy Transmission System by Comparison of Circuit Measurements and Simulations
Evaluation of High-Frequency Leakage Current from Air-Core Transcutaneous Energy Transmission System by Comparison of Circuit Measurements and Simulations
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DOI：
10.1109/apccas47518.2019.8953159
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
Shunsuke Takahashi;K. Shiba
中科院分区：
文献类型：
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作者：
Shunsuke Takahashi;K. Shiba
使用空心经皮能量传输系统（TETS）是一种在向心室辅助装置提供能量方面显示出巨大潜力的方法。TETS由Transformer的两个线圈组成，两个线圈之间缠绕导线;初级（外部）线圈安装在体外，次级（内部）线圈嵌入患者的皮下组织中。在这里，应该注意的是，高频泄漏电流（HFLC）从TETS可以流入之间的初级和次级线圈到地面，因为线圈和人体组织的电容耦合，我们开发了空芯线圈，并覆盖他们与绝缘布制成的棉花和聚对苯二甲酸乙二醇酯片在这项研究中。利用电路仿真软件对TETS的高频LC进行了分析，并利用SIMeXtensible SPICE软件建立了TETS的电路模型，该电路模型由直流稳压电源、逆变电路、高频隔离Transformer、经皮Transformer、整流电路和负载电阻组成。实际测量中，寄生电容是根据MOSFET的寄生电容来确定的。将相应的电路参数（例如初级和次级线圈的电感）用作LCR计在207 kHz的发射频率下的测量值，使用10-30 W的发射功率分析HFLC。结果表明，HFLC的模拟值为3.40 mA，在15 W输出功率下的实测值为3.93 ±0.32 mA。这些结果被认为是在良好的协议。
Usage of the air-core transcutaneous energy transmission system (TETS) is a method that shows great potential with respect to the supply of energy to ventricular assist devices. The TETS is composed of two coils of the transformer with spirally wound conductive wires; the primary (external) coil is fitted outside the body and the secondary (internal) coil is embedded in the subcutaneous tissue of a patient. Here, it should be noted that high-frequency leakage current (HFLC) from the TETS can flow between the primary and secondary coils into the ground because of the capacitive coupling of the coils and human tissue, and we developed air-core coils and covered them with an insulation cloth made of cotton and polyethylene terephthalate sheets in this study. We analyzed the HFLC of a TETS using a circuit simulator and designed a circuit model of a TETS using SIMetrix SPICE, we created a circuit model of TETS consisting of a regulated DC power supply, inverter circuit, High-frequency isolation transformer, transcutaneous transformer, rectifier circuit, and load resistance. The parasitic capacitance was based on the datasheet of MOSFET which was used in actual measurement. The respective circuit parameter (e.g. inductance of the primary and the secondary coil) was used as the measurement value of LCR meter at the transmitting frequency of 207 kHz, the HFLC was analyzed using transmitting powers of 10–30 W. The results showed that the simulated value of the HFLC was 3.40 mA, and the measured value was 3.93 ±0.32 mA at 15 W of output power. These results are seen to be in good agreement.