1. Low-Frequency Medium Power Capacitor-Free Self-Resonant Wireless Power Transfer.
- Author
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Jiang, Chaoqiang, Gaona, Daniel E., Shen, Yanfeng, Zhao, Hui, Chau, K. T., and Long, Teng
- Subjects
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WIRELESS power transmission , *AIR gap (Engineering) , *DIELECTRIC materials , *CAPACITORS , *DIELECTRICS , *ELECTRIC capacity - Abstract
With the rapid development of wireless power transfer (WPT), the self-resonant WPT system without using additional compensation capacitors has attracted attention. However, most of reported self-resonant WPT systems have low power transfer (less than 100 W) and high operating frequencies at megahertz. In this article, four multilayer, self-resonant WPT coil pads with different dielectrics are designed and experimentally validated. The aim of this article is to increase the power rating and decrease the operating frequency for capacitor-free WPT system compared to reported systems used in consumer electronics. Analysis of integrated compensation capacitance, inductance, and parasitic capacitance of the coil is provided. Finite-element analysis is used to evaluate four dielectric materials, mica, polypropylene, polyimide, and fiberglass. An experimental setup has been developed, which can achieve more than 360-W power transfer for a 120 mm air gap with an efficiency of 82% and an operating frequency of near 80 kHz. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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