Capacitive Tuning of Adaptive Inductive Wireless Power Transfer System With a Class-E Power Amplifier

2020 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (EIConRus) Pub Date : 2020-01-01 DOI:10.1109/EIConRus49466.2020.9039402

E. V. Selyutina, E. Mindubaev

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引用次数: 1

Abstract

Adaptive inductive wireless power transfer (IWPT) systems can operate despite coils displacement or changes in properties of biological tissue surrounding the coils. The main tuning methods of IWPT systems include input power adjustment, operating frequency tuning and impedance tuning. In this work, impedance tuning of IWPT system based on class-E power amplifier was studied. Capacitive tuning is a method of impedance tuning. During numerical modeling of the IWPT system, two cases were considered. In the first case, capacitances of the series and shunt capacitors in the amplifier loading network were calculated using by Sokal's equations. In the second case, capacitances were calculated and adjusted manually. In the first case maximum efficiency was less than 50 %, and switch power losses were reaching 22…61 % of the total input power. In the second case maximum efficiency was 82 %, and switch power losses were less than 5 % of the total input power. Therefore, verification of capacitive tuning in the IWPT system with a class-E power amplifier was successful.

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e类功率放大器自适应感应无线电力传输系统的电容调谐

自适应感应无线电力传输(IWPT)系统可以在线圈位移或线圈周围生物组织特性变化的情况下运行。IWPT系统的主要调谐方法包括输入功率调谐、工作频率调谐和阻抗调谐。本文研究了基于e类功率放大器的IWPT系统阻抗调谐问题。电容调谐是阻抗调谐的一种方法。在对IWPT系统进行数值模拟时，考虑了两种情况。在第一种情况下，利用索卡尔方程计算了放大器负载网络中串联电容器和并联电容器的电容。在第二种情况下，电容是手动计算和调整的。在第一种情况下，最大效率低于50%，开关功率损耗达到总输入功率的22.61%。在第二种情况下，最大效率为82%，开关功率损耗小于总输入功率的5%。因此，用e类功率放大器验证IWPT系统的容性调谐是成功的。

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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2020 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (EIConRus)

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