Research On Dynamic Magnetically Resonant Coupling Wireless Power Transfer System

Wireless power transmission system transfer power by electromagnetic wave,microwave,electric field,which realize the electrical isolation of power supply and power equipment,with the advantages of safety,reliability,flexibility.What's more,Magnetically-coupled resonant wireless power transfer technology has high research and application value and many advantages,such as long transmission distance,high transmission efficiency and little influence on environment and human body.The main research of this paper is as follows:1.This paper expounds the characteristics of wireless power transmission technology and the research status at home and abroad.This paper mainly introduces the research background and main technical problems of dynamic wireless power transmission system2.The mutual inductance model of wireless transmission system is established by analyzing loosely coupled transformer mode.In this paper,the coupled mode theory is used to explain the energy transfer mechanism of the magnetically-coupled resonant wireless power transfer system.The effects of the loss of the internal resistance of the coil,the input energy of the excitation source and the energy exchange between the two coils on the energy of the system are analyzed.Finally,the corresponding parameters are obtained by comparing the mutual inductance model and the coupled mode model.3.The compensation capacitance of the basic compensation topology of two coil radio energy transmission system is derived.On this basis,the expression of the output power and transmission efficiency of the basic compensation topology is given.In addition,based on the analysis and comparison of the characteristics of the four kinds of basic compensation topologies,a new SPS compensation topology is proposed.4.The effect of coil quality factor analysis of multi coil wireless power transmission system of the output power and transmission efficiency,based on which an adjusting drive coil and compensation capacitor load coil power regulation method,and introduce the switch control structure without compensation capacitor capacitance differential regulation,through simulation and experimental verification of its feasibility.Finally,the NI sbRIO embedded system is used to control the four coil magnetic resonance wireless power transmission system to realize the automatic tracking of the maximum power point.