Grid-Tied Completely Soft-Switched Isolated DC/DC Converter Architecture Using Charge Management Method for Fast EV Charging Station

This article suggests a fast-charging architecture for electric vehicle (EV) in which the Phase-Shifted Full-Bridge (PSFB) DC/DC converter functions as the power transferring agent between the EV battery and the output acquired from the Interleaved Boost Converter (IBC), acting as power factor correction (PFC). IBC is used as a dual control loop in this instance. The inner current loop guarantees unity power factor operation between grid voltage and grid current, while the outer loop maintains the proper DC-link voltage. The outside loop uses a PI controller for stable dynamic operation, while the inner current loop is controlled by a PR controller for faster operation. The Phase-Shifted Full-Bridge (PSFB) DC/DC converter is a widely recommended solution for high-power, high-voltage applications, making it an intriguing option. The PSFB converter boasts multiple perks, consisting of the capacity to operate at zero voltage in the primary side’s active switches, which is crucial for reaching high efficiency levels at high frequencies. The grid current’s total harmonic distortion (THD) stays within the specified range. Here load is assumed to be a battery. The battery is being charged in the constant current (CC), CC-constant voltage (CV) mode, according to the simulation results. The entire system has been substantiated by MATLAB/Simulink and thus it reinforces the suggested rapid charging architecture’s effectiveness.