A Wound Field Switched Flux Machine with Field and Armature Windings Separately Wound in Double Stators

Z. Q. Zhu, Z. Z. Wu, D. J. Evans, W. Q. Chu

Research output: Contribution to journalArticle

39 Citations (Scopus)


In this paper, a double stator (DS) wound field (WF) switched flux (SF) (DS-WFSF) machine is proposed. In the DS-WFSF machine, field and armature windings are separately placed in two different stators. Compared with the conventional WFSF machine with single stator, in which both field and armature windings are located, nonoverlapping concentrated windings and large slot areas can be obtained in the DS-WFSF machine. The proposed DS-WFSF machine exhibits >19% higher torque than the conventional WFSF machine, with both machines having the same space envelope and being globally optimized. The influence of leading design parameters, such as copper loss ratio between the field and armature windings, air-gap diameter, and rotor iron piece thickness and widths, on the average output torque is investigated for the DS-WFSF machines having 12/10, 12/11, 12/13, and 12/14 stator slots/rotor iron pieces. All the analyses are confirmed by both finite element and experimental results.

Original languageEnglish
Article number6966771
Pages (from-to)772-783
Number of pages12
JournalIEEE Transactions on Energy Conversion
Issue number2
Publication statusPublished - 25 Nov 2014


  • Double stator (DS)
  • dual stator
  • power density
  • switched flux (SF)
  • torque density
  • wound field (WF)

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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