Research On Magnetic Resonance Coupled Radio Transmission System

Magnetic resonance coupled radio transmission system is also called wireless power transmission(WPT).With the rapid development of the world today.Wireless power transmission technology to get rid of the dependence on the wire to overcome the inconvenience in the medical field,underwater mine work and so on.In this paper,a four-coil system is used as a model to study the magnetic coupling resonance technique.Specific research content is:Analysis of transmitter design and coil design using coupled-mode theory and circuit theory.Based on the circuit theory,the system model is built,and the relationship between the output power and the output efficiency of the four-coil system is deduced from the mathematical point of view.The magnetic field distribution around the four-coil model in the eddy current field is obtained through the analysis of the four-coil system model by the electromagnetic simulation software Ansoft Maxwell,and the co-simulation is carried out in the transient field using Ansoft Maxwell and Simplorer.Described the need for resonance compensation.The influence of system operating frequency,coupling coefficient and transmission distance on the transmission performance of the system is analyzed to provide the basis for selecting the coil parameters.In this paper,an optimization factor? is proposed to improve the transmission performance of the system,which makes the system maintain the maximum transmission efficiency at its inherent operating frequency and avoid the generation of frequency splitting.A new transmission system of composite resonant wireless power transmission is proposed,which provides a new direction for the research of wireless energy in the future.Finally,the transmitter and receiver of the system are analyzed and designed the main circuit,given the system driver circuit,inverter circuit and other main circuit design.A low-power experimental device suitable for the four-coil ssss type system is constructed to provide the physical circuit and experimental analysis results.