Three-Coil Structure Wireless Power Transfer System With Natural Constant Current and Constant Voltage Output Characteristics for Massive EBs Battery Charging

IF 1.6 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Circuit Theory and Applications Pub Date : 2026-04-06 Epub Date: 2025-08-07 DOI:10.1002/cta.70085

Shujia Xu, Le Yu, Lin Yang, Changsong Cai, You Lv, Guangyi Yang

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引用次数: 0

Abstract

Wireless power transfer (WPT) is used in charging electric bicycles (EBs) due to its safety and convenience. However, existing WPT charging systems have problems such as unnecessary cross-coupling, redundant compensation components, additional AC switches, and complex parameter design. In order to solve the above problems, this paper proposes a WPT charging system based on a three-coil structure. Through the special parameter design of the three-coil structure, the system can achieve constant current (CC) output and constant voltage (CV) output under zero phase angle (ZPA) operation, avoiding the influence of unnecessary cross-coupling on the system output. In addition, by optimizing the LCC topology on the receiving side, the transition from CC to CV can be naturally achieved. It is worth emphasizing that the system only needs one inverter to charge a group of EBs at the same time, which reduces the system cost. Firstly, the proposed WPT charging system is theoretically analyzed in detail. Secondly, the WPT system is verified to have load-independent CC and CV output characteristics and ZPA operation through simulation. Finally, an experimental prototype is built. Both charger 1 and charger 2 achieved 3 A CC output and 80 V CV output. The experimental results verified the correctness of the theoretical analysis.

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具有自然恒流恒压输出特性的三圈结构无线电力传输系统，用于大规模EBs电池充电

无线电力传输（WPT）因其安全性和便捷性被用于电动自行车（EBs）充电。然而，现有的WPT充电系统存在着不必要的交叉耦合、冗余的补偿元件、额外的交流开关和复杂的参数设计等问题。为了解决上述问题，本文提出了一种基于三线圈结构的WPT充电系统。通过对三圈结构的特殊参数设计，系统可以在零相角（ZPA）运行下实现恒流（CC）输出和恒压（CV）输出，避免了不必要的交叉耦合对系统输出的影响。此外，通过优化接收端的LCC拓扑，可以自然地实现从CC到CV的过渡。值得强调的是，该系统只需要一台逆变器同时对一组EBs充电，从而降低了系统成本。首先，对所提出的WPT收费系统进行了详细的理论分析。其次，通过仿真验证了WPT系统具有与负载无关的CC和CV输出特性以及ZPA操作。最后，建立了实验样机。充电器1和充电器2都实现了3 A CC输出和80 V CV输出。实验结果验证了理论分析的正确性。

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来源期刊

International Journal of Circuit Theory and Applications 工程技术-工程：电子与电气

CiteScore

3.60

自引率

34.80%

发文量

277

审稿时长

4.5 months

期刊介绍： The scope of the Journal comprises all aspects of the theory and design of analog and digital circuits together with the application of the ideas and techniques of circuit theory in other fields of science and engineering. Examples of the areas covered include: Fundamental Circuit Theory together with its mathematical and computational aspects; Circuit modeling of devices; Synthesis and design of filters and active circuits; Neural networks; Nonlinear and chaotic circuits; Signal processing and VLSI; Distributed, switched and digital circuits; Power electronics; Solid state devices. Contributions to CAD and simulation are welcome.