A novel coreless contra-rotating axial-flux machine for wind power applications

Xing Zhao, Shuangxia Niu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


This paper presents a novel coreless bidirectional axial-flux-modulation machine for direct-drive contra-rotating wind power generation. Different with the conventional axial flux wind generators, in the proposed machine, dual rotors rotate in the opposite directions and all permanent magnets (PM) with the same polarity are alternatively located with salient poles in rotors. With the bidirectional flux modulation effect, a high-speed rotating magnetic flux harmonic is produced in the air gap and interacts with the coreless windings to produce electricity. With this design, the induced frequency is enhanced and machine volume can be reduced. In addition, the coreless structure can reduce the iron loss. The electromagnetic performance of the proposed machine is analyzed by finite element method (FEM).
Original languageEnglish
Title of host publicationIEEE CEFC 2016 - 17th Biennial Conference on Electromagnetic Field Computation
ISBN (Electronic)9781509010325
Publication statusPublished - 12 Jan 2017
Event17th Biennial IEEE Conference on Electromagnetic Field Computation, IEEE CEFC 2016 - Hotel Hilton Miami Downtown, Miami, United States
Duration: 13 Nov 201616 Nov 2016


Conference17th Biennial IEEE Conference on Electromagnetic Field Computation, IEEE CEFC 2016
Country/TerritoryUnited States


  • Contra-rotating
  • Coreless
  • FEM
  • Flux modulation

ASJC Scopus subject areas

  • Computational Mathematics
  • Instrumentation
  • Electrical and Electronic Engineering

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