Optimization On Receiver DCDC Converter Of Dynamic WP[T

Dynamic wireless charging can realize the electric energy supplement in the driving process of electric vehicles.It is of great significance to study dynamic wireless power transmission for battery charging.This paper mainly studies the receiver DCDC converter in the dynamic wireless power transmission system.the main reasons: First,the input and output voltage fluctuation at the DWPT receiver is large,the DCDC converter is buck and boost converter.In order to reduce the impact of output on the battery,the way of charging should be constant current charging,Second,to save electric energy,the efficiency of the receiver DCDC converter and the reasonable design of the receiver DCDC converter parameters Count;finally,the receiver converter of the vehicle,need to reduce the volume of the DCDC converter and improve the power density,so the last chapter of the DCDC converter hardware design to optimize the power density.Specifically,the main research contents of this article are as follows:Firstly,The suitable converter topology is selected according to the requirements of this subject.The selected two-tube Buck-Boost topology working mode is analyzed in detail.The mode smooth switching strategy and the method of suppressing mutual inductance fluctuation are proposed,and the proposed control strategy and method is simulated and verified by experimentsSecondly,the converter parameters are of great significance for the efficiency and power density of the converter.By optimizing the converter parameters,a set of suitable parameters can be found to improve the efficiency and power density of the converter.A method for optimizing the parameters of the DCDC converter is proposed in this paper.This method parses the loss of the system and indirectly optimizes the power density by optimizing the efficiency.power device and power inductance in the main circuit are selected.The MAXWELL software is used to simulate the inductance loss of the converter,the LTspice software is used to simulate the power device loss in the converter,and the proposed parameter optimization design method is used to simulate the dynamic loss of the converter.The wireless charging system is designed by the method.The inductance designed have smaller volume and smaller loss.Finally,according to the above control strategy and parameter optimization design results,input and output capacitor in the main circuit are selected.According to design index,,design main circuit and drive circuit and draw PCB of the main circuit.The main circuit adopts PCB wiring,and the stacked mother is arranged on PCB,and the temperature rise of the main circuit PCB is simulated,the parasitic inductance of the converter circuit is optimized on PCB,and the receiver converter is designed.Radiators in the converter system are designed using the Icepak and Plecs software.The power density and efficiency of the converter is evaluated according to the above control strategy,parameter optimization design results and hardware design.