Multiphase Drives for Hybrid-Electric Propulsion in Light Aircrafts: a Viable Solution

Abstract

This paper explores from the electrical standpoint the enabling technologies for hybrid-electric Unmanned Aerial Vehicles (UAVs) designed for medium-altitude long-endurance mission profiles. In particular, with reference to a baseline light aircraft formerly propelled by a gasoline piston engine, different hybrid-electric architectures are compared in terms of power flow management, safety increase and overall aircraft weight reduction. For the selected hybrid solution, the discussion provides a comprehensive overview on the main features and constraints that have driven the definition of the electric system layout and the identification of the main specifications for the multiphase power converters and electric machine.