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| An Overview of Electric-Filed Coupling Wireless Power Transfer Technology |
| Qing Xiaodong1, Su Yugang1,2 |
1. School of Automation Chongqing University Chongqing 400030 China;
2. China National Center for International Research on Wireless Power Transfer Technology Chongqing 400030 China |
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Abstract In recent years, with the rapid development of electric-filed coupling wireless power transfer (EC-WPT) technology, moreover the transmission power and distance have been greatly improved. In this paper, the concept of EC-WPT technology in various kinds of literatures is summarized, and the basic working principle of the EC-WPT system is analyzed. Focusing on theoretical researches, the works based on system modelling, capacitive coupler, high-frequency converter, resonant network, control method, and power & signal parallel transmission are expounded. Meanwhile, this paper analyses the EC-WPT applications about consumer electronics, implantable devices, industrial manufacturing, electric vehicle, and underwater devices. The future research directions of EC-WPT technology are described and discussed from five aspects: single-capacitor wireless power transfer, power transmission across metal barrier, loss model of the capacitive coupler, hybrid WPT system, and safety issues.
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Received: 11 September 2020
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2021, Vol. 36 
