A Comparative Study on Nine- and Twelve-Phase Flux-Switching Permanent-Magnet Wind Power Generators

Lingyun Shao, Wei Hua, Feng Li, Juliette Soulard, Z. Q. Zhu, Zhongze Wu, Ming Cheng

Research output: Contribution to journalArticlepeer-review

15 Citations (SciVal)
36 Downloads (Pure)


In this paper, two flux-switching permanent-magnet (FSPM) wind power generators with 9- and 12-phase windings are designed and comparatively analyzed. Both two generators are designed under the rated specifications of 10 kW output power and 220 V phase voltage at 500 r/min. The static characteristics and power generating performances including output voltage, power, and efficiency at rated and variable load/speed conditions are predicted by finite-element analysis and validated by experimental tests based on the two FSPM prototypes. It shows that the 12-phase 24-stator-slot/22-rotor-pole FSPM generator exhibits a higher air-gap flux density, a higher torque/power density, and a lower voltage regulation factor. Besides, it has a better overload capability than its 9-phase 36-stator-slot/34-rotor-pole counterpart when the load and wind speed exceed the rated levels. The comparative study reveals the benefits of the lower leakage flux and permeance from the larger stator-slot opening and longer magnetic circuit.

Original languageEnglish
Article number8686206
Pages (from-to)3607-3616
Number of pages10
JournalIEEE Transactions on Industry Applications
Issue number4
Early online date11 Apr 2019
Publication statusPublished - 31 Aug 2019


  • 12 phase
  • 9 phase
  • flux-switching
  • permanent magnet
  • switched flux
  • wind power

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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