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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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
Publication statusPublished - 1 Jul 2019
Externally publishedYes


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


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