具有强抗偏移及轻量化特性的电场耦合式无人机无线电能传输系统

The receiver in the traditional magnetic-field coupling unmanned aerial vehicle (UAV) wireless power transfer (WPT) system is loud and heavy, and the anti-misalignment performance of the system is poor. To solve these problems, this paper proposes a novel electric-field coupling WPT (E-WPT) system with misalignment-tolerance and light-weight characteristics for the UAVs. First, the design requirements of capacitive coupler for UAV application are analyzed. On this basis, a novel capacitive coupler is proposed, and it is studied from three aspects: electric field distribution, equivalent circuit model and coupling performance. Secondly, the power system topology is designed based on the LCLC-CL resonance compensation network, and the system modeling and analysis are presented. Finally, a prototype is built to verify the feasibility and effectiveness of the proposed scheme from the aspects of system power transmission capacity and anti-misalignment performance. The experimental results show that the capacitive receiver is easy to install, and light in weight. The transmission power of the developed prototype is 223.3W with an overall system efficiency of 80.6%. When the receiving plate moves arbitrarily in the area above the transmitting plate, the output power and efficiency are constant.