Research On Single-wire Power Transmission Technology With High Transfer Ratio Coupling Coils

At present,there are many problems in the widely used wired power transmission technology: power line and pylons will consume large amounts of metal resources,in inflammable and explosive occasions exist security threat,power supply will affect the equipment flexibility for mobile devices,however,the technology of wireless power transmission(WPT)is not yet mature,so this paper makes an in-depth study on the single-wire power transmission technology between the two.The single-wire power transmission technology only uses one wire to connect the power supply and load.If the earth,rivers,lakes and seas and other natural media are used to replace the single wire,the application flexibility can be greatly improved and WPT or quasi-wireless power transmission can be realized,thus providing possibilities for solving the power supply problems in remote mountainous areas and offshore islands.Two kinds of single-wire power transmission systems with high transfer ratio coupling coils are studied in this paper,which are single-wire power transmission systems with double closed coils and single-wire power transmission systems with Tesla's coils.For the single-wire power transmission system with double closed coils,a lumped parameter circuit model of the system is established in this paper.According to the actual working conditions,the circuit model is simplified reasonably.Using the simplified circuit model,the working frequency of the system is analyzed theoretically.The design and fabrication of high frequency transmitting power supply are introduced in detail,the common circuit topology of high-frequency inverter power supply is compared.The topology of the main circuit is selected properly.The overall design of the main circuit and the selection of related components are carried out according to the main circuit of the power supply.The frequency characteristics and load characteristics of the single-wire power transmission system using Tesla's coils are studied by using the experimental method,and the working principle of the system is further explored through the experiments of different system structures,and the rationality and accuracy of the circuit model are verified.In this paper,the single-wire power transmission system with double closed coils is studied experimentally from different aspects,including the frequency characteristics,load characteristics,distance characteristics of the system,as well as the influence of the length and impedance of the single wire on the transmission effect.Finally,the feasibility of the system to realize the wireless power transmission after removing the single wire is verified by experiments,and preliminary experimental exploration is carried out.