Open-Circuit Fault-Tolerant Control for Nonsinusoidal Back EMF Five-Phase PMSM With Copper Loss Reduction

Research output: Journal PublicationArticlepeer-review


Due to the different design optimization, five-phase electrical machines can have a nonnegligible distortion in their back electromotive force (EMF) waveform. Most fault-tolerant control methods for this machine used extra fundamental and third-order harmonic currents to eliminate the torque fluctuation due to the nonsinusoidal back EMF, bringing high copper loss. An open-circuit fault tolerant control using the original transformation matrix is proposed in this article with the objective of converting the parts of torque fluctuations into useful output for copper loss reduction by harmonic current injection. Compared with the previous methods, the proposed method has not only low torque fluctuations, but also the copper loss is reduced by 29% further. Copper loss reduction and the dynamic response of the proposed method are experimentally verified, confirming the advantage of the proposed method.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Publication statusPublished - 4 Aug 2023


  • Circuit faults
  • Copper
  • Fault tolerance
  • Fault tolerant systems
  • Fault-tolerant operation
  • five-phase permanent magnet (PM) motor
  • Harmonic analysis
  • harmonic current injection
  • open-circuit (OC) fault
  • Torque
  • Windings

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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