electromagnetism; finite element methods; electric motors; heaters
Abstract :
[en] Purpose – The aim of this paper is the experimental validation of an original time-domain thin-shell formulation. The numerical results of a three-dimensional thin-shell model are compared with the measurements performed on a heating device at different working frequencies.
Design/methodology/approach – A time-domain extension of the classical frequency-domain thin-shell approach is used for the finite-element analysis of a shielded pulse-current induction heater. The time-domain interface conditions at the shell surface are expressed in terms of the average flux density vector in the shell, as well as in terms of a limited number of higher-order components.
Findings – A very good agreement between measurements and simulations is observed. A clear advantage of the proposed thin-shell approach is that the mesh of the computation domain does not depend on the working frequency anymore. It provides a good compromise between computational cost and accuracy. Indeed, adding a sufficient number of induction components, a very high accuracy can be achieved.
Originality/value – The method is based on the coupling of a time-domain 1D thin-shell model with a magnetic vector potential formulation via the surface integral term. A limited number of additional unknowns for the magnetic flux density are incorporated on the shell boundary.
Disciplines :
Electrical & electronics engineering
Author, co-author :
V Sabariego, Ruth ; Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Applied and Computational Electromagnetics (ACE)
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Bibliography
Geuzaine, C., Dular, P. and Legros, W. (2000), "Dual formulations for the modeling of thin electromagnetic shells using edge elements", IEEE Trans. Magn., Vol. 36 No. 4, pp. 799-803.
Gyselinck, J., Sabariego, R. V., Dular, P. and Geuzaine, C. (2008), "Time-domain finite-element modelling of thin electromagnetic shells", IEEE Trans. Magn., Vol. 44 No. 6, pp. 742-5.
Krähenbühl, L. and Muller, D. (1993), "Thin layers in electrical engineering. Example of shell models in analyzing eddy-currents by boundary and finite element methods", IEEE Trans. Magn., Vol. 29 No. 5, pp. 1450-5.
Mayergoyz, I. D. and Bedrosian, G. (1995), "On calculation of 3D eddy currents in conducting and magnetic shells", IEEE Trans. Magn., Vol. 31 No. 3, pp. 1319-24.
Sabariego, R. V., Geuzaine, C., Dular, P. and Gyselinck, J. (2008), "h-and a-time-domain formulations for the modelling of thin electromagnetic shells", IET Sci. Meas. Technol., Vol. 2 No. 6, pp. 402-8.
Shenkman, A., Berkovich, Y. and Axelrod, B. (2006), "Pulse converter for induction-heating applications", IEE Proc. Electr. Power Appl., Vol. 153 No. 6, pp. 864-72.
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