DocumentCode :
959525
Title :
Magnetostatic field computation by finite element formulation
Author :
Sarma, Mulukutla S.
Author_Institution :
Northeastern University, Boston, Massachussets
Volume :
12
Issue :
6
fYear :
1976
fDate :
11/1/1976 12:00:00 AM
Firstpage :
1050
Lastpage :
1052
Abstract :
Recent years have witnessed considerable research activity in the application of digital-computer methods for the determination of the electro-magnetic fields in electrical machinery through the solution of Maxwell´s equations, while taking full account of the magnetic saturation. Two distinct numerical approaches are evident in the literature: Finite-Difference Method and Finite-Element Method. The author has presented in the recent years a finite difference formulation for 3-dimensional numerical solutions of the nonlinear electromagnetic field problems in terms of potential functions, and has applied for the analysis of the end-zone fields of aerospace homopolar alternators and solid-rotor induction motors. The present work is directed towards the finite-element formulation for the numerical solution of three-dimensional nonlinear magnetostatic field problems. A variational principle is developed here utilizing the vector potential concept. The approach is based on variational methods in which a corresponding energy functional for the nonlinear case is minimized over the entire region. The minimization is performed by means of the finite-element method and the resultant set of nonlinear algebraic equations is solved through iterative schemes.
Keywords :
FEM; Finite-element method (FEM); Nonlinear magnetics; Alternators; Electromagnetic analysis; Electromagnetic fields; Finite difference methods; Finite element methods; Machinery; Magnetic analysis; Magnetostatics; Maxwell equations; Saturation magnetization;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1976.1059162
Filename :
1059162
Link To Document :
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