A Study on High-Density Design of Interleaved Boost Converter for Hydrogen Electric Trams with Coupled Inductor

Since the hydrogen electric tram operates based on hydrogen, a renewable energy source, a lot of research and development has recently been conducted at home and abroad. A high-density boost-type DC-DC converter that boosts the voltage of the hydrogen fuel cell is required between the hydrogen fuel cell and the inverter of the hydrogen electric tram. The interleaved boost converter is used as a conventional boost converter because it has a wide input/output voltage range, and operates with a phase difference for each module, allowing the volume of the capacitor and inductor to be reduced compared to a single boost converter. However, although the volume of the capacitor can be reduced, it is difficult to reduce the volume of the single module inductor, so there is a limitation that the volume of the entire converter system can be increased. Therefore, to solve this problem, this paper proposes to apply a coupled inductor to an interleaved boost converter.