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Introduction
This project proposes the design and analysis of a magnetically coupled interleaved buck converter integrated as an on-board charger for light electric vehicles (LEVs). The interleaved buck topology using magnetically coupled inductors reduces current ripple, improves dynamic response, and enhances power density. It also offers current sharing among phases and reduces thermal stress on components, making it suitable for compact and efficient LEV charging systems.
Objectives
- To design a multi-phase interleaved buck converter with magnetically coupled inductors for LEV on-board charging.
- To minimize output current ripple and improve transient response.
- To optimize magnetic component design for high power density and efficiency.
- To validate performance through simulation and prototype testing.
Methodologies
- Detailed design of coupled inductor parameters and interleaved converter operation.
- Mathematical modeling of current ripple reduction and power losses.
- Simulation in MATLAB/Simulink of the charging system with dynamic loading.
- Fabrication of hardware prototype and performance evaluation including efficiency, output ripple, and thermal behavior.
Expected Outcomes
- Significant reduction in output current ripple improving battery charging quality.
- Enhanced power density and system efficiency due to magnetic coupling.
- Improved thermal management and component reliability.
- Successful prototype demonstration suitable for LEV on-board charger applications.
Applications
- Light electric vehicle in-board charging systems.
- High-efficiency DC-DC converters in automotive and transportation sectors.
- Portable and compact charging solutions for urban mobility devices.
- Electric scooter, bike, and small EV power electronics.
