An Electric-Field Coupled Power and Data Simultaneous Transmission System

This paper proposes a single-wire electric-field coupled power and signal transmission system based on shared channel. The two-plate electric-field coupled system using a single-wire structure could transfer power in seawater. Firstly, the parameters of double-sided T-LCL compensation network are calculated by using the integral double T method. The power transmission channel with easy expandability for signal loading is built, and both of output and anti-frequency offset characteristics of the system are analyzed. Secondly, a signal transmission branch based on shared channel is designed, and the models of power and signal channels are established to analyze the feasibility of parallel transmission of power and signal. Finally, through experimental verification, the system could achieve power transmission of 83.1W in seawater at over 84% efficiency with anti-frequency offset characteristics, and the duplex signal transmission speed is 100kbps.