Power Density Analysis of Dual Multilevel Inverters for Hybrid-Electric Aircraft Propulsion Systems

Research and development for practical implementation of electric aircraft is being actively pursued. Weight reduction is particularly crucial for electric aircraft applications. This paper proposes a design platform to analyze the relationship between circuit topologies, modulation strategies, and inverter weight for a 500 kW power converter system. The analysis identified methods to minimize the combined weight of among power modules, DC capacitor, cooling of power semiconductors and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$d v / d t$</tex> filters, contributing to the design of electric aircraft power conversion systems.