BOARD CHARGER (OBC) FOR ELECTRIC VEHICLES

This paper presented a complete modeling, control design, and simulation study of a 3.3 kW dual-stage On-Board Charger (OBC) for electric vehicles. The proposed PI-controlled PFC boost converter and isolated DC-DC converter configuration achieves high efficiency (95.4%), excellent power quality (PF 0.994, THD 2.85%), and smooth CC-CV battery charging transition. The continuous closed-loop feedback guarantees fast dynamic suppression of grid disturbance and voltage overshoot. Future research will explore adaptive fuzzy-PI hybrid tuning and SiC semiconductor physical prototype validation.

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