Modeling of High-Efficiency Battery Charger for Light EVs Using MATLAB/SIMULINK

Recently, there has been a rise in interest towards electric and hybrid electric cars (EVs and HEVs) to lower the levels of pollution in the environment. The batteries used for propulsion in electric vehicles (EVs) may be charged from the grid through an on-board charger in these cars. Chargers are a vital component of an electric vehicle; hence, it is necessary to have chargers that have a high efficiency and a high power factor. In this paper, it is proposed that a bridgeless single-power conversion battery charger is used to achieve high efficiency. It is constructed of an isolated step-up AC-DC converter and a series resonance circuit that is connected in series. The bridgeless design helps to cut down on the conduction losses that are experienced by the input diode rectifier. The zero current switching that is provided by the series-resonance circuit helps to lessen the reverse recovery losses that are caused by the output diodes (ZCS). In addition, the core of the transformer may be activated in both directions owing to direct and series-resonance current injection, which contributes to the device's high-power capacity. The total harmonic distortion and power factor are the two metrics that are used in the analysis of the efficiency of the power conversion performed by the charger. Since it is integrated into the EV, the battery has to be as compact as possible, as well as lightweight and long-lasting. In a single-stage power conversion, the control approach that is derived from feedback linearization is established. This allows the proposed charger to regulate the output power and modify the power factor. The MATLAB/SIMULINK is used throughout the process of developing and validating the proposed system.