The ee_dc_fast_charger project in MATLAB 2021b uses a dual-stage power conversion topology. The Front-End Converter (FEC) is a single-phase boost PFC (Power Factor Correction) converter that operates in continuous conduction mode. The DC-DC converter is a two-phase interleaved buck converter that operates in continuous conduction mode.
The boost PFC converter is used as the first stage to ensure that the input current is in phase with the input voltage, which improves power factor and reduces harmonic distortion. The boost converter boosts the input voltage to a higher level, which is then fed to the second stage DC-DC converter. The DC-DC converter is used to regulate the output voltage and current to charge the battery.
The interleaved buck converter is used as the DC-DC converter to improve the efficiency and reduce the size and cost of the system. The two-phase interleaved buck converter reduces the input and output current ripple and increases the power handling capacity.
Overall, this dual-stage power conversion topology provides high efficiency, power factor correction, and reduced harmonic distortion.
