Externally-coupled transcutaneous energy transmission for a ventricular assist device-Miniaturization of ferrite core and evaluation of biological effects around the transformer

2013 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2013-12-12 DOI:10.1109/BioCAS.2013.6679675

T. Shibuya, K. Shiba

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引用次数: 6

Abstract

This paper reports on the miniaturization of the ferrite core of an externally-coupled transcutaneous transformer (ECTT) for a ventricular assist system. First, we designed the miniaturization of the ECTT and measured the transmission efficiency. We investigated whether the ferrite core of the ECTT could be miniaturized without a decline in the efficiency. Secondly, the electromagnetic simulator was analyzed via the specific absorption rate and the internal electric field strength in the human body by employing the transmission line modeling method. As a result, a maximum energy transmission efficiency of 98.20% (12 turns) was obtained by the miniaturization of the ECTT. Additionally, electromagnetic analysis of the biological effects revealed that the internal electric field falls well below the guidelines of the International Commission on Non-Ionizing Radiation Protection for frequencies above 300 kHz. The miniaturized ECTT is confirmed to be safe for transmission frequencies over 300 kHz.

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心室辅助装置的外耦合经皮能量传输——铁氧体磁心的小型化和变压器周围生物效应的评估

本文报道了用于心室辅助系统的外耦合经皮变压器(ECTT)铁氧体磁芯的小型化。首先，我们设计了ECTT的小型化，并测量了其传输效率。我们研究了ECTT的铁氧体磁芯能否在不降低效率的情况下小型化。其次，采用传输线建模的方法，通过比吸收率和人体内部电场强度对电磁模拟器进行分析。结果表明，ECTT的小型化使其最大能量传输效率达到98.20%(12转)。此外，对生物效应的电磁分析显示，内部电场远远低于国际非电离辐射防护委员会对300千赫以上频率的指导方针。小型化的ECTT被证实在超过300千赫的传输频率下是安全的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2013 IEEE Biomedical Circuits and Systems Conference (BioCAS)

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