Design and Control of Three Phase Single Stage Bi-Directional High Frequency Current Source Converter for EV Charging

Power electronics converters are required to provide reliable and efficient charging methods for electric vehicles (EVs). For a conventional charger, AC is rectified using boost derived rectifier and then stepped down to battery voltage level i.e. 400V using buck chopper. This paper presents a three phase buck PFC which will act as Rectifier i.e. Grid-to-Vehicle (G2V) as well as Inverter i.e. Grid-to-Vehicle (V2G) mode,in a single stage with unidirectional switches only. Using buck derived topology, three phase 400V AC is rectified and stepped down to 400V DC in single stage. An modified Space Vector Pulse Width Modulation (SVPWM) scheme is implemented for both G2V and V2G mode which reduces the switching loss while maintaining high quality of grid current. All analytical results are validated by simulation results using PowerSIM.