A Power Quality Improved EV Charger With Bridges CUK Converter

Abstract

This paper presents a power quality improved electric vehicle (EV) charger employing a bridgeless Cuk converter for efficient and high-performance battery charging applications. Conventional EV chargers often suffer from poor power quality, high input current distortion, and low power factor due to the use of diode bridge rectifiers and conventional converter structures. To overcome these limitations, the proposed charger utilizes a bridgeless Cuk converter topology that eliminates the front-end diode bridge, thereby reducing conduction losses and improving overall efficiency. The proposed system is designed to operate in continuous conduction mode and incorporates power factor correction (PFC) to achieve near-unity power factor and low total harmonic distortion (THD) at the input side. In addition, the Cuk converter provides regulated DC output with reduced current ripple, making it highly suitable for efficient and stable EV battery charging. The charger also supports improved input current shaping and enhanced power quality while maintaining reliable charging performance. Simulation and experimental analysis demonstrate that the proposed bridgeless Cuk converter-based EV charger offers superior efficiency, reduced harmonic distortion, and better compliance with power quality standards, making it a promising solution for modern electric vehicle charging infrastructure.