Paper Information

Journal:   INDUSTRIAL ENGINEERING & MANAGEMENT SHARIF (SHARIF: ENGINEERING)   SUMMER 2007 , Volume 23 , Number 38; Page(s) 43 To 50.
 
Paper: 

A NEW APPROACH IN MODELING DYNAMIC EFFECTS OF MAGNETIC FIELD IN FERROMAGNETIC MATERIALS, USING FINITE ELEMENT METHOD

 
 
Author(s):  FALAH CHOLABI E., SHOKR ELAHI MOGHANI J.
 
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Abstract: 

Most electromagnetic systems work under variable magnetic fields. Fast variation of a magnetic field may cause eddy current and excess loss in ferromagnetic materials. This paper presents a simple and practical technique in field analysis of electromagnetic systems having dynamic effects (eddy current and excess loss effects). Based on existing formulations for eddy current and excess loss, an equivalent expression for field intensity has been introduced. A new technique has been presented, in order to include this expression in the finite element code. A typical system has been modeled by this code. Effects of relaxation and time step were examined on the stability and the convergence rate of the process. The validity of the proposed model has been checked by comparing its results with experimental measurements.

 
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