SEPIC-Derived Semi-Bridgeless PFC Converter for Battery Charging in MATLAB Simulink & Simscape

Research objective

Examine a SEPIC-derived semi-bridgeless power-factor-correction front end for battery charging, focusing on shaping the mains input current while regulating a charger output.

Software and model scope

Primary environment: MATLAB/Simulink & Simscape. Discipline: Electrical Engineering. The video provides a project demonstration; source models, solver settings and plots should be checked against the actual implementation before reuse.

Simulation / modelling methodology

• Describe each conduction interval and the roles of inductors, coupling capacitor, rectification devices and controlled switches.
• Set up an AC input, high-frequency converter and battery-equivalent load with voltage/current sensing.
• Apply an outer voltage or charging-current loop together with an inner input-current shaping loop and suitable PWM.
• Evaluate startup, line-voltage variation, charging-load variation and realistic switching effects.

Outputs and checks for validation

• Mains voltage and current alignment and input power factor
• Input current harmonic spectrum and THD under declared conditions
• Inductor currents, switch voltage/current stress and converter duty ratio
• Battery charging voltage, current and DC output ripple

How to interpret results

PFC assessment requires both power factor and harmonic distortion; one cannot infer compliance from an aligned waveform alone. Charging regulation must be evaluated at several battery voltages and load conditions.

Verification caveat: Check conduction paths for both mains half-cycles and sign conventions; distinguish ideal and nonideal semiconductors; avoid claiming standards compliance without a stated standard and measured spectrum.

Applications for OEM and PhD research

EV battery chargers, AC–DC conversion, high-power-factor rectifiers, converter efficiency studies and power-electronics coursework.

Project thumbnail

Preview image is matched to the hosted file after media synchronization.

Technical blogs for this simulation

• Technical simulation guide
• Methods and validation guide

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Frequently asked questions

Which software is used for this simulation?

MATLAB/Simulink & Simscape is the primary environment named in this project.

What should be checked before using its results?

Check conduction paths for both mains half-cycles and sign conventions; distinguish ideal and nonideal semiconductors; avoid claiming standards compliance without a stated standard and measured spectrum.

Can this project support a new research comparison?

It can serve as a reference workflow, but any new claim requires a fresh model, documented parameters, independent validation and genuinely measured outputs.

Important notice

contents are for representative purposes, actual content may vary