电场耦合式水下无线电能传输系统的耦合机构

基于电场耦合原理对水下无线电能传输系统进行建模分析,并简述其基本工作原理。对水下无线电能传输系统的关键部分耦合机构进行重点研究,包括水下耦合机构等效电容值的计算、电场分布情况、传输距离对其影响及功率损耗分析,并与空气中耦合机构进行对比。得出结论如下:(a)水下耦合机构的等效电容值比在空气环境中大,并且不受传输距离的影响;(b)增大工作频率和接收端负载,可以减小耦合机构的损耗。设计水下电场耦合无线电能传输实验系统,验证了上述结论。

Study on the coupling structure of underwater wireless power transmission system via electric coupling

This paper proposes a system of Electric-field Coupled Power Transfer working in the seawater environment. At first, the basic working principle of proposed system is briefly introduced. The electric field coupling is a key part to delivery power in this system, thus this study focus on the calculation of equivalent capacitance of the underwater coupling structure, the distribution of electric field, the influence of transmission distance on it and the power loss. Then, the result is compared with the air coupling structure. Based on this research, there are two important conclusions: (a)The equivalent capacitance of underwater coupling structure is larger than that in the air environment and not affected by the transmission distance; (b)Increasing the operating frequency or the load can reduce the power loss of coupling structure. Finally, the experimental system of electricfield coupled power transfer(ECPT)is designed to verify above conclusions.