Design of Capacitive Power Transfer System with Small Coupling Capacitance for Wireless Power Transfer

Q3 Engineering

EAI Endorsed Transactions on Energy Web Pub Date : 2024-04-11 DOI:10.4108/ew.5735

Xin Wang, Xin Wan, Yaodong Hua, Yunkai Zhao, Yuxin Wang

引用次数: 0

Abstract

Wireless power transfer systems play an important role in the application of modern power supply technology. Wireless charging has been widely used in portable devices such as smartphones, laptops, and even some medical devices. Higher system efficiency can be achieved while reducing costs. This article describes the design of a capacitive power transfer (CPT) system using the Class-E amplifier method. When the capacitance of the coupling plate is small, the operation of Class-E amplifiers under Zero-Voltage-Switching (ZVS) conditions is very sensitive to their circuit parameters. By adding an additional capacitor to the Class-E amplifier, the coupling capacitance can be increased, resulting in better circuit performance. The high efficiency of the Class-E amplifier is verified by simulation and experimental results.

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设计具有小耦合电容的电容式无线电力传输系统

无线电力传输系统在现代供电技术的应用中发挥着重要作用。无线充电已广泛应用于智能手机、笔记本电脑等便携设备，甚至一些医疗设备。在降低成本的同时，还能实现更高的系统效率。本文介绍了使用 E 类放大器方法设计电容式功率传输（CPT）系统。当耦合板的电容较小时，E 类放大器在零电压开关（ZVS）条件下的工作对其电路参数非常敏感。通过在 E 类放大器中增加一个额外的电容器，可以增大耦合电容，从而提高电路性能。模拟和实验结果验证了 E 类放大器的高效率。

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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来源期刊

EAI Endorsed Transactions on Energy Web Energy-Energy Engineering and Power Technology

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： With ICT pervading everyday objects and infrastructures, the ‘Future Internet’ is envisioned to undergo a radical transformation from how we know it today (a mere communication highway) into a vast hybrid network seamlessly integrating knowledge, people and machines into techno-social ecosystems whose behaviour transcends the boundaries of today’s engineering science. As the internet of things continues to grow, billions and trillions of data bytes need to be moved, stored and shared. The energy thus consumed and the climate impact of data centers are increasing dramatically, thereby becoming significant contributors to global warming and climate change. As reported recently, the combined electricity consumption of the world’s data centers has already exceeded that of some of the world''s top ten economies. In the ensuing process of integrating traditional and renewable energy, monitoring and managing various energy sources, and processing and transferring technological information through various channels, IT will undoubtedly play an ever-increasing and central role. Several technologies are currently racing to production to meet this challenge, from ‘smart dust’ to hybrid networks capable of controlling the emergence of dependable and reliable green and energy-efficient ecosystems – which we generically term the ‘energy web’ – calling for major paradigm shifts highly disruptive of the ways the energy sector functions today. The EAI Transactions on Energy Web are positioned at the forefront of these efforts and provide a forum for the most forward-looking, state-of-the-art research bringing together the cross section of IT and Energy communities. The journal will publish original works reporting on prominent advances that challenge traditional thinking.