Flux-Weakening Control Performance of Partitioned Stator-Switched Flux PM Machines

D. J. Evans, Z. Q. Zhu, H. L. Zhan, Z. Z. Wu, X. Ge

Research output: Contribution to journalArticlepeer-review

29 Citations (SciVal)


This paper first investigates the flux-weakening control performance of two types of partitioned stator-switched flux permanent-magnet (PM) (PS-SFPM) machines and then proposes a novel mechanical flux-weakening technique. The PS-SFPM machine topologies, operation principles, and flux-weakening control method are described. In addition, it is shown that by mechanically varying the relative position of two stators of the PS-SFPM machine, the PM flux linkage can also be varied, and hence, it can provide improvement in the speed range and torque capability. The optimal relative mechanical angle is derived to enable the maximum torque capability and reduce or even avoid the flux-weakening current injected by the inverter. The proposed technique is verified by three-dimensional (3-D) finite-element (FE) analyses and experiments on the prototype machines.

Original languageEnglish
Article number7414502
Pages (from-to)2350-2359
Number of pages10
JournalIEEE Transactions on Industry Applications
Issue number3
Early online date19 Feb 2016
Publication statusPublished - 1 May 2016


  • Brushless machines
  • flux-weakening
  • mechanical flux-weakening
  • partitioned stator (PS)
  • switched flux
  • variable flux

ASJC Scopus subject areas

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


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