Hysteresis modeling in transient analysis of electric motors with AlNiCo magnets

Chuang Yu, Shuangxia Niu, Siu Lau Ho, Weinong Fu, Longnv Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

26 Citations (Scopus)


Electric motors fabricated with aluminum-nickel-cobalt (AlNiCo) permanent magnets (PMs) can be operated over a wide speed range, as the strong nonlinear demagnetization characteristics of AlNiCo allow effective and efficient airgap flux control. This paper presents a linear hysteresis model which is derived from the Preisach model for AlNiCo PMs, to be incorporated into the time-stepping finite element method to study the motor performance, especially transient performance, accurately and effectively. The proposed method can significantly reduce the computing time without scarifying the accuracy of the Preisach model. The validity and accuracy of the proposed method are verified by both simulation and experimentation.
Original languageEnglish
Article number6919313
JournalIEEE Transactions on Magnetics
Issue number3
Publication statusPublished - 1 Mar 2015


  • Aluminum-nickel-cobalt (AlNiCo)
  • finite element method
  • hysteresis model
  • memory motor
  • permanent magnet (PM)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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