Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A 11 kW 5.58 kW/L Electrolytic Capacitor-less EV Charger With Single- and Three-Phase Compatibility
Authors Hyung-Jin Kim ; Jun-Yeong Park ; Sun-Ju Kim ; Ramadhan Muhammad Hakim ; Huu Kieu Phuc ; Se-Wan Choi
DOI 10.6113/TKPE.2021.26.4.277
Page pp.277-284
ISSN 1229-2214
Keywords Universal charger; On-board charger; Electrolytic capacitor-less; Power decoupling circuit; High power density
Abstract A single and three phase-compatible single-stage EV charger without electrolytic capacitor is proposed in this study. DC battery-charging current is inherently guaranteed in the three-phase grid due to three output currents with a phase shift of 120° between each other. The proposed EV charger can provide a DC battery charging current for the single-phase grid through the integrated active power decoupling circuit without using additional switches. The proposed EV charger ensures ZVS turn-on of all switches with wide grid and battery voltage ranges. The 11 kW prototype of the proposed EV charger demonstrates a peak efficiency of 97.01% and a power density of 5.58 kW/L.