Study On Modeling And Simulation Of Full Bridge Converter For EV Charger Module

In the electric vehicle applications,the battery continued to repeat the charge-discharge cycle.Therefore,the battery charging system need to provide fast and efficient charging,and try to use simple equipment and components,and not cause any damage in the charge-discharge process.The whole charging process is divided into two stages,constant current charging and constant voltage charging.During the charging process,the voltage and current of each unit of the entire battery pack array should be monitored,and therefore usually requires the use of more complex and expensive control systems.It should also take into account the isolation,safety and suitability of high power density,high efficiency,low cost,immunity to interfering environments and etc.Therefore the battery charger design is a real technical challenge,the circuit topology used is usually the full bridge converter.For the power converters,the efficiency and switching performance are the two most critical requirements.This paper studies the high power density of electric car charging module,showing that it is possible to improve the performance by optimization of circuit topology and device functions.By means of modeling and simulation,analysis are carried out on the converter transformers,freewheeling diode and the full bridge topology,its mode of operation of positive and negative feedback,and conclusions are made.