Modeling Method And Control Strategy For DWPT System Applicated In EVs Charging

Dynamic Wireless Power Transfer(Abbreviated as DWPT)applicated in Electric Vehicles has many advantages,such as clean energy,convenient charging,strong endurance.In recent years,domestic and foreign rise the Research on DWPT system,hoping that in the near future become a charging method for electric vehicles in a wide range of applications.The main research work of this paper is as follows:1?In order to simulate the dynamic time-varying characteristics of DWPT system,a resonant compensation topology including dual transmitters is designed,and a tuning method based on superposition principle is proposed accordingly.Finally,through the simulation circuit,it is verified that the system is always in resonance state.2?In order to establish a more accurate DWPT system mechanism model,the primary-secondary modeling idea and State Space Averaging(Abbreviated as SSA)method are used to propose an SSA-based DWPT system.Finally,the model calculation results and simulation results are compared to verify the accuracy of the mechanism model.3?In order to improve the transmission efficiency of DWPT system,a control method combining the nonlinear control law and the dual-loop control law is proposed.A DWPT system efficiency improvement control strategy based on dual-loop nonlinear PI controller is proposed.And design the simulation circuit to verify the efficiency of the control strategy to improve the control effect.4?In order to improve the robustness of DWPT system,a constant power control strategy of DWPT system based on ADRC controller is proposed by using Auto Disturbance Rejection Control(Abbreviated as ADRC)technology.The simulation circuit was also designed to verify the constant power control effect of the control strategy.