Power Electronic Converter with Improved Power Quality for EV Charger Application

Department of Electrical and Electronics Engineering, Gokaraju Rangaraju Institute of Engineering and Technology-Autonomous, Bachupally, Hyderabad, Telangana, India - 500090

^* Corresponding author: moshinashaik@gmail.com

Abstract

High voltage electrical vehicle battery models are acquiring plenty of attention in both industry and the scholarly field for their capacity to decrease charging time and increase battery life. Existing EV chargers use a strong non - linear diode bridge rectifier to deliver Direct Current voltage at the DC-DC converter’s input, which degrades input AC current power quality. Due to these issues, typical battery chargers must eliminate the input bridge to improve power quality (PQ). This research uses an upgraded PQ-based bridgeless (BL) Luo converter. Two Luo converters use this PFC converter’s input inductor throughout their half cycles. A PFC converter without an input diode bridge may offer a cost less, power-density increased EV charging solution with few switches. Synchronizing the charger’s input current with source voltage increases input power factor. Luo converters provide the largest voltage transfer gain. Various segments of the project were simulated in order to understand their characteristics. The open-loop and closed-loop analysis of ULC with PI control yields graphical results that highlight the connection between the duty cycle and voltage transfer gain. The simulation graphs obtained for the dc-dc buck converter and Li-Ion SOC also provide important results for analysis.