Technology Trends of Superconducting Rotating Machines for Aircraft Propulsion Systems

Abstract

This paper describes the technological trend of superconducting rotating machines for future electric aircraft propulsion systems. In order to realize these systems and replace the state-of-the-art turbofan engines in aviation systems, lightweight electric equipment such as motor/generators of 16 kW/kg or higher and power converters of 19 kW/kg or higher are required. Since superconducting wires have a higher current density than copper wires, they have the potential to realize such high-power density rotating machines. Therefore, there are many research groups studying the superconducting rotating machines for future electric aircraft systems. This review will introduce not only the research trends of superconducting rotating machines and systems, but also the state-of-the-art motors and hybrid aviation systems.