Parameter identification of five-phase induction machines with single layer windings

Ayman S. Abdel-Khalik, Mohamed I. Daoud, Shehab Ahmed, Ahmed A. Elserougi, Ahmed M. Massoud

Research output: Contribution to journalArticle

29 Citations (Scopus)


Despite the increased interest in multiphase induction machines for safety-critical applications, machine parameter identification for the different sequence planes is still a challenging research point. In most available literature, the effect of nonfundamental sequence planes is overlooked due to the assumption of sinusoidal winding distribution and healthy operation. However, in a single layer or concentric winding layout with an odd number of phases, the effect of flux produced by nonfundamental sequence planes cannot be ignored for the open-phase case. This paper proposes a simple offline method to estimate the parameters of a five-phase induction machine corresponding to different sequence planes. The proposed technique can estimate the stator leakage inductance as well as the magnetizing inductance of both fundamental and third sequences by applying a quasi-square voltage to the stator winding while the machine is running at no-load. Consequently, the rotor circuit parameters of the fundamental sequence plane can be simply obtained by deducting the stator impedance from the blocked rotor machine impedance. For the third sequence plane, an approximate relation to estimate these parameters based on the measured fundamental sequence rotor parameters is also given. An experimental 1.5 Hp prototype machine is used to verify the proposed technique.

Original languageEnglish
Article number6701178
Pages (from-to)5139-5154
Number of pages16
JournalIEEE Transactions on Industrial Electronics
Issue number10
Publication statusPublished - Oct 2014



  • Multiphase machine
  • blocked rotor test
  • induction machine
  • no-load test
  • open phase
  • parameter identification
  • sequence planes
  • steady-state model

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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