Single-phase front-end modified interleaved Luo power factor correction converter for on-board electric vehicle charger

This paper proposes a modification in the interleaved negative output elementary Luo converter to act as front-end power factor correction converter for on-board electric vehicle (EV) charger. The proposed converter is simple in design and offers non-inverted DC link output voltage. The proposed converter has the advantages-high efficiency, near unity power factor, low AC source current distortion resulting in power quality enhancement, better DC load voltage regulation, and reduced component count. Due to interleaved configuration, rating of circuit components gets greatly reduced. Also, minimum numbers of circuit components pave the way for simple system design of on-board EV charger. The steady-state performance of the designed 100-W, 48-V converter with closed-loop controller is analyzed under universal input voltage variation and wide range of load power variation. The converter is designed to provide stable operation when subjected to sudden disturbance in load power/supply voltage. The simulation analysis is done using MATLAB/Simulink platform. A prototype of 48-V, 100-W converter is built and tested. Results obtained reveal the superior performance of proposed converter under steady-state and transient conditions.