An equivalent parameter extraction method of transient electric circuit and magnetic field coupled problems based on sensitivity computation of system equations

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8 Citations (Scopus)


A method to extract the equivalent parameters of transient electric circuit and magnetic field coupled problem based on sensitivity computation on the system equations is presented. The field equations are derived by using the finite element method. In contrast to traditionally used methods which are based on the physical meanings and physical relationships of the parameters, in this method, the parameters are extracted from the mathematical system equations which include the eddy-current magnetic field equations and internal circuit equations. Its advantage is that it is applicable to complex problems, inside which the reactive energy, iron losses, and copper losses are difficult to be isolated and expressed. The extracted parameters can include the effects of eddy currents, internal circuits, and mechanical motion. It has been applied to indirect coupling between external circuits and transient magnetic field with internally connected circuits.
Original languageEnglish
Article number5721889
Pages (from-to)2068-2075
Number of pages8
JournalIEEE Transactions on Magnetics
Issue number8
Publication statusPublished - 1 Aug 2011


  • Electric circuit
  • equivalent parameter
  • finite element method
  • indirect coupling
  • sensitivity
  • transient magnetic field

ASJC Scopus subject areas

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

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