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Keywords: magnetic hysteresis, mechanical stress, magnetic field computation.

Summary

The implementation of the developed stress dependent Preisach-type anisotropic magnetic vector hysteresis model into the finite element method with strong magnetoelastic coupling is presented in this paper. The results of the calculation with the finite element method of the modified Epstein frame's two-imensional model have been introduced.

The measurement proved, that the magnetic properties of the material are sensitive to the applied stress, the stray energy losses decreased by increasing the tensile force. The model parameters have been used according to the results of the measurements [1].

Maxwell's equations represent the magnetic behaviour of the magnetic material. The Fe-Si laminations of the modified Epstein frame were calculated with hysteretic media. In this case the time-varying eddy current field has been tested with the developed stress dependent Preisach-type magnetic model. The A,V - A potential formulation have been applied for the calculation.

The finite element method is a widely used technique to approximate the solution of the partial differential equations. The basic idea of the finite element method is to divide the complex problem into a finite number of small finite elements for easier approximation [2].

In the case of strong magnetoelastic coupling, the effect of the elastic field on the magnetic field is also taken into account. This type of analysis is significant if the mechanical stress in the apparatus is high enough to change the magnetic properties of the material. The elastic displacement field can also change the geometry of the specimen and influence the solution of the magnetic field. The strong magnetoelastic coupling needs an iterative procedure to yield the feedback effect by using either the same computer procedure or different codes to solve the coupled magnetic and elastic field assignment. The strong coupling method makes it possible to account for geometrical changes, magnetostriction, and applying external forces [3].

References

1: A. Sipeky, A. Ivanyi, "Magnetic hysteresis under applied stress", Physica B, 372, 177-180, 2006.
2: M. Kuczmann, A. Ivanyi, "The Finite Element Method in Magnetics" Akadémiai Kiadó, Budapest, 2008.
3: A. Belahcen, "Magnetoelastic coupling in rotating electrical machines", IEEE Trans. Magn., 41(5), 1624-1627, 2005. doi:10.1109/TMAG.2005.846123

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 91 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: B.H.V. Topping, L.F. Costa Neves and R.C. Barros Paper 104 Stress Dependent Magnetic Hysteresis implemented in an Electromagnetic Field Computation A. Sipeky, I. Jancskar, Z. Sari and A. Ivanyi Department of Information Technology, Pollack Mihály Faculty of Engineering, University of Pécs, Hungary doi:10.4203/ccp.91.104 purchase the full-text of this paper Full Bibliographic Reference for this paper A. Sipeky, I. Jancskar, Z. Sari, A. Ivanyi, "Stress Dependent Magnetic Hysteresis implemented in an Electromagnetic Field Computation", in B.H.V. Topping, L.F. Costa Neves, R.C. Barros, (Editors), "Proceedings of the Twelfth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 104, 2009. doi:10.4203/ccp.91.104 Keywords: magnetic hysteresis, mechanical stress, magnetic field computation. Summary The implementation of the developed stress dependent Preisach-type anisotropic magnetic vector hysteresis model into the finite element method with strong magnetoelastic coupling is presented in this paper. The results of the calculation with the finite element method of the modified Epstein frame's two-imensional model have been introduced. The measurement proved, that the magnetic properties of the material are sensitive to the applied stress, the stray energy losses decreased by increasing the tensile force. The model parameters have been used according to the results of the measurements [1]. Maxwell's equations represent the magnetic behaviour of the magnetic material. The Fe-Si laminations of the modified Epstein frame were calculated with hysteretic media. In this case the time-varying eddy current field has been tested with the developed stress dependent Preisach-type magnetic model. The A,V - A potential formulation have been applied for the calculation. The finite element method is a widely used technique to approximate the solution of the partial differential equations. The basic idea of the finite element method is to divide the complex problem into a finite number of small finite elements for easier approximation [2]. In the case of strong magnetoelastic coupling, the effect of the elastic field on the magnetic field is also taken into account. This type of analysis is significant if the mechanical stress in the apparatus is high enough to change the magnetic properties of the material. The elastic displacement field can also change the geometry of the specimen and influence the solution of the magnetic field. The strong magnetoelastic coupling needs an iterative procedure to yield the feedback effect by using either the same computer procedure or different codes to solve the coupled magnetic and elastic field assignment. The strong coupling method makes it possible to account for geometrical changes, magnetostriction, and applying external forces [3]. References 1 A. Sipeky, A. Ivanyi, "Magnetic hysteresis under applied stress", Physica B, 372, 177-180, 2006. 2 M. Kuczmann, A. Ivanyi, "The Finite Element Method in Magnetics" Akadémiai Kiadó, Budapest, 2008. 3 A. Belahcen, "Magnetoelastic coupling in rotating electrical machines", IEEE Trans. Magn., 41(5), 1624-1627, 2005. doi:10.1109/TMAG.2005.846123 purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £140 +P&P)
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