Analysis of Stator Slots and Rotor Pole Pairs Combinations of Rotor-Permanent Magnet Flux-Switching Machines

Peng Su, Wei Hua, Mingjin Hu, Zhongze Wu, Jikai Si, Zhe Chen, Ming Cheng

Research output: Contribution to journalArticle

1 Citation (Scopus)
23 Downloads (Pure)


This paper investigates the influence of stator slots and rotor pole pairs combinations on torque performances in rotor permanent magnet flux switching (RPM-FS) machines. Based on a magnetomotive force (MMF) permeance model, the candidates of stator slots and rotor pole pairs combinations with higher torque capability can be determined by analyzing the PM-MMF and winding factor. Meanwhile, the candidates with a lower torque ripple can be obtained by referring to the cogging torque, which is related to the greatest common divisor of stator slots and rotor pole pairs. In addition, from the field modulation principle, the RPM-FS machines with the same fundamental magnetic loadings and winding factors exhibit identical fundamental harmonic torque, but different modulation harmonic components. Finally, four candidates with attractive torque performance are chosen, and the characteristics are verified by finite-element analysis and experiments.

Original languageEnglish
Article number8657961
Pages (from-to)906-918
Number of pages13
JournalIEEE Transactions on Industrial Electronics
Issue number2
Early online date4 Mar 2019
Publication statusPublished - 1 Feb 2020


  • Analytical models
  • finite-element analysis (FEA)
  • flux switching (FS)
  • permanent magnet (PM) machines
  • rotors
  • slots and pole pairs combination
  • torque

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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