Effects of Rotor Winding Structure on the BDFM Equivalent Circuit Parameters

Ashknaz Oraee, Ehsan Abdi, Salman Abdi Jalebi, Richard McMahon, Peter Tavner

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


The brushless doubly fed machine (BDFM) is an alternative to the doubly fed induction generator, widely used in wind turbines without use of brush gear and slip ring. Rotor design is important for achieving an optimal multi-MW BDFM. To date, nested-loop rotors have been exclusively used in various BDFMs, although they may not be ideal for larger machines. This paper studies, both analytically and experimentally, different rotors for the D160 and D400 frame size BDFMs. An optimization on the rotor equivalent circuit parameters is carried out and verified with different parameter extraction methods. A comparison of the performance of the suggested rotors is also presented.
Original languageEnglish
Pages (from-to)1660–1669
Number of pages10
JournalIEEE Transactions on Energy Conversion
Issue number4
Early online date3 Jun 2015
Publication statusPublished - Dec 2015


  • Rotors
  • Windings
  • Stator windings
  • Equivalent circuits
  • Inductance
  • Harmonic analysis
  • Brushless doubly fed machine (BDFM)
  • electrical machines
  • nested-loop rotor
  • optimization

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