Design and fabrication of a wireless charging system, which includes a wireless charging base station and an unmanned aerial vehicle (UAV) with wireless charging capability is proposed for enlarging the UAV's working range. First, an optimized magnetic coupler featuring with an orthogonal magnetic structure with a flexible soft magnetic core in receiver is proposed to ensure high efficiency and low-leakage magnetic flux interference. Second, a wireless charging circuit topology and a closed-loop power controller implemented on the primary side are designed and analyzed in detail to maintain constant current/constant voltage charging for the UAV. Then, a wireless charging station with position correction aid device is developed, which can achieve high-precision alignment. A prototype of the UAV wireless charging system with the proposed magnetic structure, primary-side control, and position correction are built and tested. Experimental results show that the fabricated wireless charging system can deliver 87.4 W at a dc-to-battery efficiency of 87.3%, and the system is adapted autonomous charging of UAV.

中文翻译：

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具有正交磁结构和位置校正辅助装置的无人机无线充电系统

为了扩大无人机的工作范围，提出了一种无线充电系统的设计与制造，该无线充电系统包括无线充电基站和具有无线充电能力的无人机（UAV）。首先，提出了一种优化的磁耦合器，该耦合器具有正交磁性结构，并且在接收器中具有柔性软磁芯，以确保高效率和低泄漏磁通干扰。其次，详细设计和分析在一次侧实现的无线充电电路拓扑和闭环功率控制器，以保持对无人机的恒定电流/恒定电压充电。然后，开发了具有位置校正辅助装置的无线充电站，其可以实现高精度对准。构建并测试了具有拟议的磁性结构，一次侧控制和位置校正的无人机无线充电系统的原型。实验结果表明，所制造的无线充电系统可以以87.3％的直流至电池效率提供87.4 W的功率，并且该系统适用于无人机的自主充电。