Design and Research of Wireless Power Transfer System Based on Parity-Time-Symmetric

IF 1.6 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Electrical Engineering & Technology Pub Date : 2024-07-31 DOI:10.1007/s42835-024-01977-7

Yan Liu, Minghui Han, Hao Pan

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Abstract

The traditional Wireless Power Transfer (WPT) system has the problem that the coupling coefficient has a great influence on the transmission characteristics. The WPT system with PT-symmetric structure can achieve the transmission characteristics independent of the coupling coefficient and maintain stable power and efficiency transmission in the strong coupling region constructed by the PT-WPT system. To further optimize PT-WPT, this paper proposes a PLL controlled wireless power transfer system based on PT-symmetric theory. Phase-locked loop (PLL) is employed to accurately control the power of the transmitter and the system can maintain constant transmission power and efficiency in the strong coupling region. In addition, this control method also reduces the complexity of WPT system. A 10–15 W experimental WPT system platform with a 0–10 cm transmission distance is developed to validate the transmission power and efficiency of the system, The results demonstrate that the output voltage and current of the inverter can always ensure that the system works in the PT-symmetric state and the transmission efficiency is more than 90%, The transmission power is not less than 10 W within the transmission range of 0–10 cm. The designed system can maintain constant high efficiency and high-power transmission in the strong coupling region.

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基于奇偶校验-时间对称的无线电力传输系统的设计与研究

传统的无线电力传输（WPT）系统存在耦合系数对传输特性影响较大的问题。采用 PT 对称结构的 WPT 系统可以实现不受耦合系数影响的传输特性，并在 PT-WPT 系统构建的强耦合区域内保持稳定的功率和效率传输。为了进一步优化 PT-WPT，本文提出了一种基于 PT 对称理论的 PLL 控制型无线电力传输系统。该系统采用锁相环（PLL）来精确控制发射机的功率，在强耦合区域能保持恒定的发射功率和效率。此外，这种控制方法还降低了 WPT 系统的复杂性。结果表明，逆变器的输出电压和电流能确保系统始终工作在 PT 对称状态，传输效率超过 90%，在 0-10 厘米的传输范围内传输功率不小于 10 W。所设计的系统能在强耦合区域内保持恒定的高效率和大功率传输。

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

Journal of Electrical Engineering & Technology ENGINEERING, ELECTRICAL & ELECTRONIC-

CiteScore

4.00

自引率

15.80%

发文量

321

审稿时长

3.8 months

期刊介绍： ournal of Electrical Engineering and Technology (JEET), which is the official publication of the Korean Institute of Electrical Engineers (KIEE) being published bimonthly, released the first issue in March 2006.The journal is open to submission from scholars and experts in the wide areas of electrical engineering technologies. The scope of the journal includes all issues in the field of Electrical Engineering and Technology. Included are techniques for electrical power engineering, electrical machinery and energy conversion systems, electrophysics and applications, information and controls.