High frequency full bridge LLC converter with SiC MOSFET used in on board EV charger
                                                                                  LAN Gui xing
                                  （College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China）


Abstract: In order to achieve higher efficiency and higher power density for an onboard lithiumion battery charger of electric vehicle, an inductor inductor capacitor (LLC) resonant dc dc converter design procedure with SiC MOSFET was presented. According to the characteristic of Charging profile of lithumion battery pack, a design methodology based on fundamental harmonic approximation was proposed and validated through experiments on a prototype converting 800 V from the input to an output voltage range of 300 V-450 V at 6.6 kW. The results indicate that under the premise of lowering the volume of passive components, the peak efficiency can reach 98.4% and the design procedure can improve the power density.
Key words: SiC MOSFET; EV Charger; LLC converter