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

Electric-field Coupled Wireless Power Transfer System With Misalignment-tolerance and Light-weight Characteristics for Unmanned Aerial Vehicle Applications

针对传统磁耦合式无人机无线电能传输系统中的接收机构体积大重量大和系统抗偏移性能差的问题,文中基于电场耦合技术提出一种具有强抗偏移及轻量化特性的无人机无线电能传输系统。首先,分析无人机这一特殊应用对象的耦合机构设计要求,在此基础上提出一种新型电场耦合机构,并从电场分布、端口模型和耦合性能3方面对其开展针对性研究。然后,基于LCLC-CL谐振补偿网络完成传能拓扑设计,并对系统进行建模分析研究。最后,搭建实验系统,从系统电能传输能力测试、抗偏移性能测试等方面验证所提出方案对无人机实施无线传能的可行性和有效性。实验结果表明,接收装置易安装重量轻,系统传输功率223.3W,整机效率80.6%,且接收极板在发射极板上方区域内任意移动时输出功率和效率基本恒定。

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.