OPTIMIZED SWITCH USED FOR ON-BOARD EV FAST CHARGING

Abstract

With the rising demand for sustainable transportation, efficient and power-qualityenhanced battery chargers are crucial for light electric vehicles (LEVs). This paper introduces a novel transformer less (TF) single-stage bridgeless converter-based charger designed to improve power quality while ensuring high efficiency and a compact design. By eliminating the conventional front-end diode bridge, the proposed charger reduces conduction losses and enhances overall system efficiency. Its single-stage topology seamlessly integrates power factor correction (PFC) and DC-DC conversion, minimizing switching losses and optimizing performance. To regulate the charging process, a Fuzzy Logic Controller (FLC) is employed, offering adaptive control under varying grid and battery conditions. Unlike traditional proportional-integral (PI) controllers, the FLC-based approach delivers superior dynamic response, improved voltage regulation, and lower harmonic distortion. This results in enhanced power factor, reduced total harmonic distortion (THD), and stable charging performance. Both simulation and experimental validation confirm the effectiveness of the proposed charger, demonstrating improved power quality, higher efficiency, and minimized grid-side disturbances. This system stands as a reliable and efficient solution for the next generation of LEV charging infrastructure