Precise magnetic field modeling techniques of rotary machines using transient finite-element method

H. L. Li, Siu Lau Ho, Weinong Fu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


A general and precise method to model rotary machines based on transient magnetic field computation using finite-element method (FEM) is presented. The merits of the proposed method are that the nonlinear iteration on the rotor position can be avoided. Formulas to predict the rotor position and speed of the machine are deduced based on Taylor's expansion. A curvilinear element is used on the two sides of the sliding surface to reduce the numerical noises arising from mesh rotation. The proposed methods for dealing with matching boundary conditions and periodic boundary conditions are very general, accurate and flexible. Typical numerical experiment shows that the numerical error of the local magnetic potentials on the motion sliding surface is only one twentieth of that of traditional interpolation method.
Original languageEnglish
Article number6332568
Pages (from-to)4192-4195
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number11
Publication statusPublished - 29 Oct 2012


  • Electric machine
  • finite-element method
  • magnetic field
  • matching boundary condition
  • rotary machine

ASJC Scopus subject areas

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

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