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A Cascaded Boost–Buck Converter for High-Efficiency Wireless Power Transfer Systems

机译：用于高效无线功率传输系统的级联升压-降压转换器

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摘要

Wireless power transfer (WPT) has attracted an ever increasing interest from both industry and academics over the past few years. Its applications vary from small power devices such as mobile phones and tablets to high power electric vehicles and from small transfer distance of centimeters to large distance of tens of centimeters. In order to achieve a high-efficiency WPT system, each circuit should function at a high efficiency along with the proper impedance matching techniques to minimize the power reflection due to the impedance mismatch. This paper proposes an analysis on the system efficiency to determine the optimal impedance requirement for coils, rectifier, and dc–dc converter. A novel cascaded boost–buck dc–dc converter is designed to provide the optimal impedance matching in WPT system for various loads including resistive load, ultracapacitors, and batteries. The proposed 13.56-MHz WPT system can achieve a total system efficiency over 70% in experiment.
机译：在过去的几年中，无线电力传输（WPT）引起了业界和学者的越来越多的兴趣。它的应用范围从移动电话和平板电脑之类的小功率设备到大功率电动汽车，从几厘米的小传输距离到几十厘米的大距离，都有所不同。为了实现高效的WPT系统，每个电路都应以高效率运行，并采用适当的阻抗匹配技术，以将由于阻抗不匹配而引起的功率反射降至最低。本文提出了对系统效率的分析，以确定线圈，整流器和dc-dc转换器的最佳阻抗要求。一种新颖的级联升压-降压dc-dc转换器旨在为各种负载（包括电阻负载，超级电容器和电池）提供最佳的WPT系统阻抗匹配。拟议中的13.56MHz WPT系统在实验中可以达到70％以上的总系统效率。

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