An NPC Based Triple Active Bridge Isolated Converter for Fast Onboard Battery Charger for All Electric Ship

The rapid evolution of electric propulsion technologies has led to a paradigm shift in the maritime industry, with all electric ships emerging as a viable and environmental-friendly alternative to conventional vessels. Electric ships, powered by energy-dense battery systems, offer reduced emissions, lower operating costs, and enhanced operational efficiency. However, the successful integration of electric ships into the maritime ecosystem necessitates a comprehensive charging infrastructure. This paper explores the critical need for high power battery chargers in electric ships. A neutral-point-clamped (NPC) based triple active bridge fault tolerant converter is designed and operated as onboard battery charger with isolation, lower voltage stress, better controllability, etc. Extensive simulation are shown to validate the operation.