High-Frequency Electric Machines for Boundary Layer Ingestion Fan Propulsor

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

Research output: Contribution to journalArticlepeer-review


High specific power electric motor is a key enabling technology for electric/hybrid-electric propulsion for aircraft. High-frequency, air core machine topologies show potential for high specific power when the machines are integrated within jet engines at high speed, e.g. 15,000 rpm. In this paper, we explore how these machines scale to a boundary layer ingestion (BLI) fan application in newly proposed Single-Aisle Turboelectric Aircraft with an Aft Boundary Layer Propulsor (STARC-ABL). Detailed analytical models that have been experimentally verified, and an evolutionary genetic algorithm are utilized to choose an optimized design for the BLI propulsor. Analyses show that a 2.6 MW, 11 kW/kg, 98% electric motor is achievable.

Original languageEnglish (US)
Article number8845621
Pages (from-to)2189-2197
Number of pages9
JournalIEEE Transactions on Energy Conversion
Issue number4
StatePublished - Dec 2019


  • Electrical machines
  • electric aircraft
  • electric propulsion
  • high power density
  • high specific power
  • high-frequency
  • slotless

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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