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

Authors

DOI:

https://doi.org/10.4108/ew.5735

Keywords:

Class-E amplifier, capacitive power transfer, ZVS conditions, Additional capacitor

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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Published

11-04-2024

How to Cite

1.
Wang X, Wan X, Hua Y, Zhao Y, Wang Y. Design of Capacitive Power Transfer System with Small Coupling Capacitance for Wireless Power Transfer. EAI Endorsed Trans Energy Web [Internet]. 2024 Apr. 11 [cited 2024 May 20];11. Available from: https://publications.eai.eu/index.php/ew/article/view/5735