Calculation of eddy currents in moving structures by a sliding mesh-finite element method

2000 ◽  
Vol 36 (4) ◽  
pp. 1356-1359 ◽  
Author(s):  
F. Rapetti ◽  
Y. Maday ◽  
A. Buffa
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Eddy Currents ◽  
Sliding Mesh ◽  
Element Method

A MSFEM to simulate the eddy current problem in laminated iron cores in 3D

2019 ◽  
Vol 38 (5) ◽  
pp. 1667-1682 ◽  
Author(s):  
Karl Hollaus
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Eddy Current ◽  
Eddy Currents ◽  
Three Dimensional ◽  
Harmonic Balance Method ◽  
Three Dimensions ◽  
Magnetic Vector Potential ◽  
Content Type ◽  
Element Method

Purpose The simulation of eddy currents in laminated iron cores by the finite element method (FEM) is of great interest in the design of electrical devices. Modeling each laminate by finite elements leads to extremely large nonlinear systems of equations impossible to solve with present computer resources reasonably. The purpose of this study is to show that the multiscale finite element method (MSFEM) overcomes this difficulty. Design/methodology/approach A new MSFEM approach for eddy currents of laminated nonlinear iron cores in three dimensions based on the magnetic vector potential is presented. How to construct the MSFEM approach in principal is shown. The MSFEM with the Biot–Savart field in the frequency domain, a higher-order approach, the time stepping method and with the harmonic balance method are introduced and studied. Findings Various simulations demonstrate the feasibility, efficiency and versatility of the new MSFEM. Originality/value The novel MSFEM solves true three-dimensional eddy current problems in laminated iron cores taking into account of the edge effect.

scholarly journals Analysis of Eddy Currents in Laminated Silicon Steel Sheets of Permanent Magnet-type MRI by 3-D Finite Element Method Using Multi Nodes Technique

2004 ◽  
Vol 124 (9) ◽  
pp. 863-870 ◽  
Author(s):  
Yoshihiro Kawase ◽  
Tadashi Yamaguchi ◽  
Ryoji Okayasu ◽  
Kei Iwashita ◽  
Masaaki Aoki ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Eddy Currents ◽  
Silicon Steel ◽  
Steel Sheets ◽  
Element Method

Calculation of eddy current losses using the electrodynamic similarity laws

2014 ◽  
Vol 63 (1) ◽  
pp. 107-114
Author(s):  
Dariusz Koteras
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Eddy Current ◽  
Eddy Currents ◽  
Numerical Calculations ◽  
Eddy Current Losses ◽  
Similarity Laws ◽  
Good Agreement ◽  
Element Method

Abstract The results of the eddy currents losses calculations with using electrodynamics scaling were presented in this paper. Scaling rules were used for obtain the values of the eddy currents losses. For the calculations Finite Element Method was used. Numerical calculations were verified by measurements and a good agreement was obtained

scholarly journals Improved error of electromagnetic shielding problems by a two-process coupling subproblem technique

2020 ◽  
Vol 23 (2) ◽  
pp. First
Author(s):  
Vuong Quoc Dang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Thin Shell ◽  
Eddy Currents ◽  
Power Losses ◽  
Thin Region ◽  
Actual Volume ◽  
Process Coupling ◽  
Good Agreement ◽  
Element Method

Introduction: The direct application of the classcial finite element method for dealing with magnetodynamic problems consisting of thin regions is extremely difficult or even not possible.  Many authors have been recently developed a thin shell model in order to overcome this drawback. However, this development generally neglects inaccuracies around edges and corners of thin shell, that lead to inaccuracies of the magnetic fields, eddy currents and joule power losses, specially increasing with the thickness. Methods: In this article, we propose a two-process coupling subproblem technique for improving the errors that overcome thin shell assumptions. This technique is  based on the subproblem method to couple SPs in two-processes. The first scenario is an initial problem solved with coils/stranded inductors together with thin region models. The obtained solutions are then considered as volume sources for the second scenario including actual volume improvements that scope with the thin shell assumptions. The final solution is sum up of the subproblem solutions achieved from both the scenarios. The extended method is approached for the h-conformal magnetic formulation. Results: The obtained results of the method are checked/compared to be close to the reference solutions computed from the classcial finite element method and the measured results. This can be pointed out a very good agreement. Conclusion: The extended method has been also successfully applied to the practical problem (TEAM workshop problem 21, model B).

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