Charging of Electric Vehicle for Low-Power Applications with Improved Power Factor Correction

This paper presents a cohesive power electronics system for charging the battery in low-power EV applications with improved power factor correction. The system employs a diode bridge rectifier (DBR) to convert AC to DC efficiently. An interleaved boost converter (IBC) is utilized, incorporating a dual loop control technique to effectively manage the DC link voltage and ensure power factor correction. Small signal modeling is conducted, leading to the development of transfer functions that streamline controller design, ensuring robust and stable operation. The interleaved boost converter is linked to a buck converter for battery charging, operating in constant current and constant voltage (CC-CV) modes to govern the charging process. MATLAB simulations are carried out to validate the proposed model. The results confirm that the proposed charging system successfully achieves its objectives, including power factor correction, reduction of Total Harmonic Distortion (THD) in input current, and Constant Current Constant Voltage (CC-CV) charging of the battery.