Improved Power Quality EV Battery Fast Charging Using Fuzzy Logic Based Bridgeless Buck-Boost Converter

Abstract

In this paper, a fuzzy logic controller-controlled bridgeless buck boost converter for an enhanced rapid charging system is proposed and simulated. When the applied voltage and line current are precisely in phase, the approach improves power quality and delivers a good power factor. In accordance with IEC 6100-3-2 power quality standards, the suggested BL buck boost charger reduces harmonic distortion and eliminates the inconsistencies of a traditional DBR-based converter. In this study, switches are controlled using the PWM approach with a CV-fuzzy logic controller at the front-end BL converter and both CC-fuzzy control and CV control to control the flyback converter, which is connected to the battery that needs to be charged. When compared to conventional PI controlling, it has been noted that quick charging and simple control are obtained. Because the converter is BL buck boost, it has fewer switches, which results in lower conduction and switching loss within a single switching cycle as well as better power quality and efficiency. Additionally, the suggested converter maintains constant battery charging voltage and current while operating across a broad range of supply voltage variations. The enhanced performance of the converter when compared to conventional controls of buck-boost setups is confirmed by simulation results.