Research On Static Resonant Wireless Charging System For Electric Vehicles

At present,due to the increasing social requirements for environmental protection and the impact of global warming,fuel vehicles are gradually replaced by new energy electric vehicles.With the rapid development of new energy electric vehicles,the charging technology of electric vehicles has also attracted extensive attention.Different from the current mature wired charging technology,the wireless charging of electric vehicles has many advantages,such as convenience,safety and reliability.Therefore,wireless charging has become the focus of current research.Firstly,the development process of electric vehicle wireless charging technology is investigated,the overall structure of wireless charging system is analyzed,and the mutual inductance equivalent model is introduced to study the compensation topology of coupled resonant circuit.Then,the characteristics of four basic compensation topologies are analyzed through numerical calculation,and then the two compensation topologies of SS and SP are compared and studied by using MATLAB software,and their characteristics are analyzed.Finally,SS compensation circuit is selected as the compensation topology of electric vehicle wireless charging system.Secondly,the basic parameters of the coupled resonant circuit are obtained according to relevant industry standards and numerical calculation,and the simulation model of mutual inductance coil is built in Maxwell software.Then the simulation research is carried out,and the simulation results are analyzed to obtain the relevant characteristics of mutual inductance coil.Then,the frequency splitting phenomenon is analyzed and studied by Matlab graphical simulation,and then the relationship between frequency splitting and load resistance and coil frequency is obtained by numerical calculation.The principle and characteristics of the frequency tracking circuit are studied.Based on the three-phase software phase-locked loop,the simulation model of the corresponding single-phase software phase-locked loop is built in Simulink.The simulation experiments verify the feasibility of the phase-locked loop module.Finally,combined with the actual situation and the characteristics of various circuits,the circuit module suitable for the wireless charging system of electric vehicle is selected,the parameters of the circuit devices are designed and selected,and the model simulation is carried out in Simulink to verify the feasibility of the circuit.Then build the physical platform of the system,and verify the feasibility of the system and the correctness of relevant theoretical research through device experiments.Figure[50]Table[4]Reference[52]...