Modeling and Construction of Single-Wire Power Transmission Based on Multilayer Tesla Coil

A single-wire power transmission (SWPT) system based on a multilayer Tesla coil is studied in this article. In the existing SWPT system, a single-layer Tesla coil is usually used, and the maximum transmission efficiency is only 50%–60% within a transmission distance of tens of meters. In this article, a Tesla coil with a multilayer structure is proposed, and the connection of earth also enables the energy of the electromagnetic field to be concentrated, which can greatly improve the transmission efficiency. Moreover, considering the parasitic parameters of the multilayer coil, the circuit model of the Tesla coil is established, and the lumped parameter circuit model of the SWPT system is further obtained. Design guidance is given based on the established model. Long-distance experimental platforms have been built, and various characteristics of the SWPT system, such as input impedance and output power, are studied. In the experiments, when the transmission distance is 70 m, power of 1150 W is transmitted with an efficiency of 90%. Power of 5 kW is transmitted with an efficiency of 87% at a transmission distance of 5 km.