Abstract：In recent years, the domestic and international civil UAV market has been developing rapidly, and UAVs have been widely used in various fields, such as electric power inspection, traffic monitoring, firefighting and rescue, agricultural plant protection, environmental mapping, and infrastructure inspection. However, the current challenge facing unmanned aerial vehicle (UAV) applications is the limited battery capacity, which cannot meet the demand for long endurance of UAVs. The emergence of wireless energy transmission (WPT) technology provides a new energy supply for UAVs and has a broad application prospect in the UAV field. Due to the problems of heavy mass, large volume, poor bias resistance, and electromagnetic interference at the onboard side of the coupling mechanism in the current UAV WPT system, a "uniformly drilled disc-circle-circle composite" electric field coupling mechanism and a UAV WPT system based on the F-LCCL-type single-side resonance compensation network are proposed. The lightweight level and anti-bias capability of the airborne side are effectively improved, and the variable load constant voltage output characteristics are provided within a specific load variation range. Firstly, the practical requirements of the UAV wireless power transmission coupling mechanism were analyzed and summarized, and a design idea of a lightweight bias-resistant wireless power transmission coupling mechanism was proposed, considering structural design, electric field distribution, and bias-resistant capability. Secondly, the system theory was analyzed, and the system circuit based on the F-LCCL single-side resonance compensation network was designed without any reactive power compensation element on the onboard side. The radio energy’s efficient and stable transmission was ensured, and the lightweight of the onboard side was realized from the aspect of the resonance compensation network. In addition, the theoretical analysis shows that the system circuit based on the F-LCCL single-side resonance compensation network has the characteristics of variable load constant voltage output within the design offset range. The finite element simulation was carried out, and a system simulation circuit based on Matlab/Simulink simulation software and an experimental device were built. The simulation and experimental results show that the scheme proposed can effectively solve the problems of heavy mass, large volume, poor bias resistance, occupying space in the belly of the aircraft, and large electromagnetic interference at the onboard end of the coupling mechanism. Efficient and stable wireless energy transmission to the battery load of the UAV is achieved. The following conclusions can be drawn. (1) The proposed coupling mechanism has 360°angular deflection resistance and strong lateral deflection resistance. The lightweight onboard side is realized. (2) The F-LCCL single-side resonance compensation network has no compensation element on the secondary side, which realizes the light weight of the onboard side from the resonance compensation network. (3) The system has variable load constant voltage output characteristics within a specific load variation range.
张鑫, 杨帅鑫, 王文杰, 范兴明. 电场耦合无人机无线电能传输系统轻量化抗偏无线输电耦合机构研究[J]. 电工技术学报, 2025, 40(14): 4343-4354.
Zhang Xin, Yang Shuaixin, Wang Wenjie, Fan Xingming. Study on Lightweight Anti-Bias Wireless Transmission Coupling Mechanism for Electric Field Coupled UAV WPT System. Transactions of China Electrotechnical Society, 2025, 40(14): 4343-4354.
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