A Single-Wire Power Transfer System Using Lumped-Parameter LC Resonant Circuits

A novel single-wire power transfer (SWPT) system has been introduced in this paper. This system consists of two identical LC circuits which are connected via a single wire to enhance the power transfer capability. By considering the ground as a quasi-conductive medium, the equivalent circuit model of proposed system is derived and then verified by simulation and experimental results. Based on the proposed circuit model, the transmission power and transmission efficiency of the system are analyzed. Moreover, the spatial current distribution and power flow are revealed by electromagnetic field simulation. The experimental results show that the power transmission with 2m distance, 200W power and 61% efficiency is obtained in the indoor lab and the power transmission with 30m distance and 30W power is achieved outdoors.