Stacked Inverter Architecture for High-Frequency Capacitive Wireless Power Transfer Systems

IF 1 4区工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI:10.1109/COMPEL52896.2023.10221189

Dheeraj Etta, Sounak Maji, Yuetao Hou, K. Afridi

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引用次数: 1

Abstract

This paper introduces a stacked inverter architecture for high-frequency capacitive wireless power transfer (WPT) systems suitable for electric vehicle (EV) charging. The proposed architecture combines the output voltages of two or more high-frequency inverters using parallel-in series-out air-core transformers, thereby increasing the power transfer capability of a capacitive WPT system. A comprehensive methodology to design a stacked inverter-based capacitive WPT system by leveraging magnetizing and leakage inductances of the air-core transformers is presented. Furthermore, performance of the stacked inverter-based capacitive WPT system is analyzed in the presence of mismatches between stacked inverters. A 6.78-MHz 12-cm air-gap prototype capacitive WPT system using three full bridge stacked inverters is designed, built and tested. This system achieves record performance for a capacitive EV charging system, transferring 5.48-kW at a peak efficiency of 89%, corresponding to a power transfer density of 72.08 kW/m2.

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高频电容式无线电力传输系统的堆叠逆变器结构

介绍了一种适用于电动汽车充电的高频电容式无线功率传输(WPT)系统的堆叠逆变器结构。所提出的架构结合了两个或多个高频逆变器的输出电压，使用并联进串出的空芯变压器，从而增加了电容式WPT系统的功率传输能力。提出了一种利用空芯变压器的磁化和漏感来设计基于堆叠逆变器的电容式WPT系统的综合方法。在此基础上，分析了叠置逆变器电容式WPT系统在叠置逆变器不匹配情况下的性能。设计、构建并测试了一个使用三个全桥堆叠逆变器的6.78 mhz 12 cm气隙电容式WPT原型系统。该系统实现了电容式电动汽车充电系统的最高性能，以89%的峰值效率传输5.48 kW，对应的功率传输密度为72.08 kW/m2。

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来源期刊

Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 工程技术-工程：电子与电气

CiteScore

1.60

自引率

0.00%

发文量

124

审稿时长

4.2 months

期刊介绍： COMPEL exists for the discussion and dissemination of computational and analytical methods in electrical and electronic engineering. The main emphasis of papers should be on methods and new techniques, or the application of existing techniques in a novel way. Whilst papers with immediate application to particular engineering problems are welcome, so too are papers that form a basis for further development in the area of study. A double-blind review process ensures the content''s validity and relevance.