Design of a five-phase brushless DC motor for a safety critical aerospace application

Xiaoyan Huang, Andrew Goodman, Chris Gerada, Youtong Fang, Qinfen Lu

Research output: Journal PublicationArticlepeer-review

107 Citations (Scopus)


This paper describes a five-phase brushless dc (BLDC) motor designed for an electrohydrostatic actuation system (EHA) suited to the thin and optimized wings. The foundation of the design is a motor with fault tolerance and high reliability, compact structure, and low weight. The motor power rating is 12 kW at 12000 rpm, and a wet form of construction is used where hydraulic oil is present in the motor to reduce the number of oil seals of the EHA for enhanced reliability and lifetime. The losses and thermal behavior are evaluated for an optimized design. Fault tolerance for BLDC motors is discussed. A five-phase motor has been manufactured, and test results are presented to validate the design.

Original languageEnglish
Article number6095347
Pages (from-to)3532-3541
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Issue number9
Publication statusPublished - Sept 2012


  • Brushless dc (BLDC) motor
  • electrohydrostatic actuation system (EHA)
  • fault tolerant

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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