• Kiran BM

This study focuses on designing and implementing an innovative charger for battery-operated electric vehicles (BEVs) that improves power factor at the input stage. The proposed design replaces the traditional diode converter used in existing electric vehicle (EV) battery chargers with a modified Landsman power factor correction (PFC) converter. This PFC converter is paired with a flyback isolated converter to manage the EV battery charging process, initially in constant current mode and then transitioning to constant voltage mode. The PFC converter employs a single sensed entity for controlling the DC-link voltage, ensuring effective regulation and unity power factor operation. Compared to conventional chargers, this new design enhances power quality, reduces device stress, minimizes input and output current ripple, and lowers input current harmonics. The performance of the charger met expectations across all tested scenarios. The core objective is to enhance power factor correction and improve overall charging efficiency. The proposed converter configuration eliminates the traditional bridge rectifier in favor of a Bridgeless Landsman converter, which provides superior performance in terms of reduced power losses and minimized input current ripple. By integrating this advanced converter with a flyback isolated converter, the system efficiently manages the charging process of EV batteries, initially operating in constant current mode and then shifting to constant voltage mode as the battery reaches full charge. This novel approach aims to achieve robust regulation of the DC-link voltage while maintaining a high power factor.

Modified Bridgless Landsman Conveter, PI controller, Power factor, Distortions, Efficiency, DC Link capacitor, PFC converter, Flyback converter, conventional chargers.

"DESIGN AND IMPLEMENTATION OF MODIFIED BRIDGLESS LANDSMAN CONVERTER FOR EV BATTERY CHARGER ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 10, page no.e184-e196, October-2024, Available :http://www.jetir.org/papers/JETIR2410419.pdf

"DESIGN AND IMPLEMENTATION OF MODIFIED BRIDGLESS LANDSMAN CONVERTER FOR EV BATTERY CHARGER ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 10, page no. ppe184-e196, October-2024, Available at : http://www.jetir.org/papers/JETIR2410419.pdf