Direct-drive electric motor for starc-abl tail-cone propulsor

Andy Yoon, Faraz Arastu, Danny Lohan, Jianqiao Xiao, Kiruba Haran

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A direct-drive, electric motor has been developed to power the tailcone propulsor for the NASA STARC-ABL aircraft. Reduced-order optimization was used to explore three propulsor concepts and converge on a motor topology that meets the STARC-ABL’s power density and efficiency requirements. Subsequent studies using high-fidelity finite-elements analysis were conducted to obtain the final motor rated for 2.6 MW, 11 kW/kg, and 98% efficiency. Reliability concerns related to turbo-electric aircraft have been addressed by introducing a segmented motor powered by parallel inverters to protect against open-circuit faults. The suspension system for the integrated motor and fan has been designed to account for thrust forces experienced during flight and an upstream motor configuration has been designed for assembling the propulsion system onto the fuselage for flight testing.

Original languageEnglish (US)
Title of host publicationAIAA Propulsion and Energy Forum and Exposition, 2019
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105906
StatePublished - 2019
Externally publishedYes
EventAIAA Propulsion and Energy Forum and Exposition, 2019 - Indianapolis, United States
Duration: Aug 19 2019Aug 22 2019

Publication series

NameAIAA Propulsion and Energy Forum and Exposition, 2019


ConferenceAIAA Propulsion and Energy Forum and Exposition, 2019
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Energy(all)
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Mechanical Engineering


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