An Electric Vehicle Battery Charger with Interleaved PFC Cuk Converter

An electric vehicle battery charger with interleaved (IL) power factor corrected (PFC) Cuk converter followed by a flyback converter is presented in this paper. The proposed configuration of PFC converter is obtained by interleaving two Cuk converter cells. The interleaving of the two cells, offers the increased reliability of the proposed charger at high power rating due to reduced input current and output voltage ripple. The design of IL converter and flyback converter, is achieved in discontinuous conduction mode (DICM). This provides the built-in advantages of zero current switching and no reverse recovery losses in diodes. Moreover, the size of the PFC inductors and number of sensor, are reduced due to DCM operation of the converter. The proposed charger is designed to control the charging of battery in CC (Constant Current) and CV (Constant Voltage) modes with an improved power quality (PQ) based operation at mains side. The total harmonics distortion in mains current is observed as per the recommended IEC 61000-3-2 standard under steady state and over wide variations in input voltage.