Electrical Machine Design Considering Corona-Resistant Wire for More Electric Aircraft Applications

Yatai Ji, Paolo Giangrande, Han Zhao, Weiduo Zhao, Vincenzo Madonna, He Zhang, Michael Galea

Research output: Journal PublicationArticlepeer-review


Higher DC link voltage and shorter rise time keep challenging the insulation system of inverter-fed low-voltage electrical machines. In more electric aircraft applications, the low-pressure working environment faced by electrical machines further increases the risk of partial discharge (PD) endangering the electric drive reliability. Through an additional inorganic insulation layer, corona-resistant (CR) wires reveal the ability to withstand PD and represent a potential solution for aerospace applications. In this paper, a CR wire is characterized and its performance is compared against that of a non-corona-resistant (NCR) counterpart in the perspective of partial discharge inception voltage (PDIV), electrical endurance, and thermal properties. A starter/generator is considered as a study case to highlight the influence of machine design when CR is employed. Two machine designs, each using CR and NCR wires are presented and analyzed in terms of rated current, copper slot fill factor, and reliability performance (PDIV and lifetime extension).

Original languageEnglish
Pages (from-to)1
Number of pages1
JournalIEEE Transactions on Transportation Electrification
Publication statusAccepted/In press - 2022


  • Aircraft
  • corona-resistant wire
  • electrical machine design
  • Insulation
  • more electric aircraft (MEA)
  • partial discharge
  • Partial discharges
  • Pollution measurement
  • Temperature measurement
  • Voltage measurement
  • Wires

ASJC Scopus subject areas

  • Automotive Engineering
  • Transportation
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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