Advancements in Superconducting Electric Propulsion: Updates on CHEETA and CRUISE Motors

The field of electrified aircraft propulsion is currently experiencing a profound shift with the emergence of superconducting electrical machines. This presentation delves into the significant strides made in the development of superconducting electric motors, with a spotlight on two key initiatives: the Center for High-Efficiency Electrical Technologies for Aircraft (CHEETA) motor and the Cryogen Free Ultra-High Field Superconducting Motor (CRUISE-motor).

Both the CHEETA motor and CRUISE-motor programs are pioneering high-risk technologies for superconducting electric propulsion. Collaborating with Hinetics, CHEETA aims to revolutionize electric aircraft with a hydrogen-powered system featuring a 2.5 MW fully superconducting electric machine. Engineered to deliver a specific power exceeding 25 kW/kg and boasting 99.9% efficiency, this machine utilizes liquid hydrogen for cooling, thereby enhancing overall system efficiency. To mitigate technological challenges and reduce risks, Hinetics is developing a 300-kW cryogenic-cooled electrical machine, integrating innovative cooling solutions in both he stator and rotor.

Simultaneously, Hinetics is spearheading the development of the CRUISE-motor forlarge-scale electric airplanes. This initiative targets a 10-MW partially superconducting electric machine with a specific power of 40 kW/kg and 99.4% efficiency. The CRUISE-motor incorporates an integrated cryocooler for rotor cooling, while its spoke-supported rotor architecture minimizes heat load on the cold mass through conduction from the ambient temperature shaft, presenting a practical solution for electric propulsion.

The insights gained from these projects significantly contribute to the evolving landscape of superconducting electric propulsion, promising cleaner and more efficient air transportation. This presentation will provide comprehensive updates on their development and testing.