Magnetics

Computational Magnetics

Many electro-technical devices such as e.g. printed circuit boards, electrical drives and antenna systems can be simulated on the basis of electrical circuits. However, the increasing frequencies and the decreasing size force designers to account for wave propagation effects, eddy-current effects, ferromagnetic saturation and hysteresis. For wave propagation effects and eddy-current effects, the results of stand-alone field simulation can be represented by an order-reduced equivalent model, which is then inserted in the overall circuit model. The representation of field-dependent nonlinearities and hysteresis effects, however, is not straightforward.

The coupled field and circuit simulation becomes troublesome when a large number of time steps is required. This occurs when e.g. simulating an electrical drive where the machine requires 10 periods of 50 Hz to reach nominal speed whereas the switching of the Insulated Gate Bipolar Transistors in the frequency converter switches at 20 kHz, necessitating a time steps in the order of a microsecond to be used in the simulation. Since the field model consists typically of a few million degrees of freedom, all those unknowns have to be solved in every time step. Fortunately, the relevant time constants in electrical-energy converter are in the range 50 Hz. Hence the field model does not have to be time-stepped at the same rate as the circuit model, in which fast switches are present. The use of adaptive multirate time-integration schemes can reduce the numerical complexity of the problem substantially.

Research Questions

Efficiency of the time-integration for field devices in pulsed circuits (multirate, dynamic iteration)
DAE-index of the coupled system
Existence and Uniqueness of the solution

Cooperation

Herbert De Gersem, Katholieke Universiteit Leuven
Markus Clemens, Bergische Universität Wuppertal
Sascha Baumanns, Universität zu Köln

Former and ongoing projects

Publications

2004: 1318.
Kleffmann, Jörg; Benter, Thorsten; Wiesen, Peter
Heterogeneous reaction of nitric acid with nitric oxide on glass surfaces under simulated atmospheric conditions
Journal of Physical Chemistry A, 108 (27) :5793-5799
2004
DOI: 10.1021/jp040184u; 1317.
Kleffmann, Jörg; Benter, Thorsten; Wiesen, Peter
Heterogeneous reaction of nitric acid with nitric oxide on glass surfaces under simulated atmospheric conditions
Journal of Physical Chemistry A, 108 (27) :5793-5799
2004
DOI: 10.1021/jp040184u; 1316.
Br{ü}nken, S.; Michael, E. A.; Lewen, F.; Giesen, Thomas F.; Ozeki, H.; Winnewisser, Gisbert; Jensen, Per; Herbst, E.
High-resolution terahertz spectrum of CH\(_{2}\) - Low J rotational transitions near 2 THz
Canadian Journal of Chemistry, 82 (6) :676-683
2004
Herausgeber: NRC Research Press Ottawa, Canada
DOI: 10.1139/v04-034; 1315.
Br{ü}nken, S.; Michael, E. A.; Lewen, F.; Giesen, Thomas F.; Ozeki, H.; Winnewisser, Gisbert; Jensen, Per; Herbst, E.
High-resolution terahertz spectrum of CH\(_{2}\) - Low J rotational transitions near 2 THz
Canadian Journal of Chemistry, 82 (6) :676-683
2004
Herausgeber: NRC Research Press Ottawa, Canada
DOI: 10.1139/v04-034; 1314.
Brünken, S.; Michael, E. A.; Lewen, F.; Giesen, Thomas F.; Ozeki, H.; Winnewisser, Gisbert; Jensen, Per; Herbst, E.
High-resolution terahertz spectrum of CH2 - Low J rotational transitions near 2 THz
Canadian Journal of Chemistry, 82 (6) :676-683
2004
Herausgeber: NRC Research Press Ottawa, Canada
DOI: 10.1139/v04-034; 1313.
Knorr, Stephanie; Günther, Michael
Index Analysis of Multirate Partial Differential-Algebraic Systems in RF-Circuits
:93--99
2004; 1312.
Yamada, Koichi M. T.; Winnewisser, Gisbert; Jensen, Per
Internal rotation tunnelling in HSOH
Journal of Molecular Structure, 695-696 :323-337
2004
Herausgeber: Elsevier
DOI: 10.1016/j.molstruc.2003.12.042; 1311.
Yamada, Koichi M. T.; Winnewisser, Gisbert; Jensen, Per
Internal rotation tunnelling in HSOH
Journal of Molecular Structure, 695-696 :323-337
2004
Herausgeber: Elsevier
DOI: 10.1016/j.molstruc.2003.12.042; 1310.
Yamada, Koichi M. T.; Winnewisser, Gisbert; Jensen, Per
Internal rotation tunnelling in HSOH
Journal of Molecular Structure, 695-696 :323-337
2004
Herausgeber: Elsevier
DOI: 10.1016/j.molstruc.2003.12.042; 1309.
Kevenaar, T. A. M.; Maten, E. J. W.; Janssen, H. H. J. M.; Onneweer, S. P.
Methods and Approaches for {RF} Circuit Simulation and Electromagnetic Modelling
In W. H. A. Schilders and E. J. W. ter Maten and S. H. M. J. Houben, Editor, Scientific Computing in Electrical Engineering at SCEE 2002, Eindhoven Band 4 aus Mathematics in Industry
Seite 29--45
Herausgeber: Springer Berlin Heidelberg
2004
29--45
DOI: 10.1007/978-3-642-55872-6_3; 1308.
Allaart-Bruin, Sandra; Maten, Jan; Lunel, Sjoerd Verduyn
Modified Extended {BDF} Time-Integration Methods, Applied to Circuit Equations
In W. H. A. Schilders and E. J. W. ter Maten and S. H. M. J. Houben, Editor, Scientific Computing in Electrical Engineering at SCEE 2002, Eindhoven Band 4 aus Mathematics in Industry
Seite 86--93
Herausgeber: Springer Berlin Heidelberg
2004
86--93
DOI: 10.1007/978-3-642-55872-6_7; 1307.
Kirsch, Stefan F.; Overman, Larry E.; Watson, Mary P.
Monomeric Cobalt Oxazoline Palladacycles (COP). Useful Catalysts for Catalytic Asymmetric Rearrangement of Allylic Trichloroacetimidates
The Journal of Organic Chemistry, 69 (23) :8101–8104
2004
ISSN: 0022-3263, 1520-6904
DOI: 10.1021/jo0487092; 1306.
Ali, G.; Bartel, A.
Multi-physics models in electric circuit design
In R. Monaco and S. Pennisi and S. Rionero and T. Ruggeri, Editor, Proceedings ’WASCOM 2003’ 12th Conference on Waves and Stability in Continuous Media, World Scientific Publishing, Singapore, 2004, Seite 1--6
In R. Monaco and S. Pennisi and S. Rionero and T. Ruggeri, Editor
2004; 1305.
Ali, G; Bartel, A
MULTI-PHYSICS MODELS IN ELECTRIC NETWORK DESIGN
Waves And Stability In Continuous Media, Proceedings of WASCOM 2003, Seite 1--6
Herausgeber: World Scientific
2004; 1304.
Alì, Giuseppe; Bartel, Andreas
Multi-physics models in electric network design
Seite 1–6
Herausgeber: World Scientific Publishing
2004
1–6
DOI: 10.1142/9789812702937_0001; 1303.
Bartel, Andreas; Günther, Michael
Multirate co-simulation of first order thermal models in electric circuit design
In Schilders, Wilhelmus H. A. and ter Maten, E. Jan W. and Houben, Stephan H. M. J., Editor, Scientific Computing in Electrical Engineering: Proceedings of the SCEE-2002 Conference held in EindhovenausMathematics in Industry, Seite 104–111
In Schilders, Wilhelmus H. A. and ter Maten, E. Jan W. and Houben, Stephan H. M. J., Editor
Herausgeber: Springer Berlin Heidelberg
2004
DOI: 10.1007/978-3-642-55872-6_9; 1302.
Bartel, Andreas; Günther, Michael
Multirate co-simulation of first order thermal models in electric circuit design
In W.H.A. Schilders and et al., Editor, Scientific Computing in Electrical Engineering: Proceedings of the SCEE-2002 Conference held in Eindhoven, Seite 104--111
Springer Berlin Heidelberg
In W.H.A. Schilders and et al., Editor
Herausgeber: Springer-Verlag, Berlin
2004; 1301.
Bartel, Andreas; Günther, Michael
Multirate co-simulation of first order thermal models in electric circuit design
In Schilders, Wilhelmus H. A. and ter Maten, E. Jan W. and Houben, Stephan H. M. J., Editor, Scientific Computing in Electrical Engineering: Proceedings of the SCEE-2002 Conference held in EindhovenausMathematics in Industry, Seite 104–111
In Schilders, Wilhelmus H. A. and ter Maten, E. Jan W. and Houben, Stephan H. M. J., Editor
Herausgeber: Springer Berlin Heidelberg
2004
DOI: 10.1007/978-3-642-55872-6_9; 1300.
Steinbacher, M.; Henne, S.; Dommen, J.; Wiesen, Peter; Pr{é}v{{\^o}}t, Andre S. H.
Nocturnal trans-alpine transport of ozone and its effects on air quality on the Swiss Plateau
Atmospheric Environment, 38 (27) :4539-4550
2004
Herausgeber: Pergamon
DOI: 10.1016/J.ATMOSENV.2004.05.008; 1299.
Steinbacher, M.; Henne, S.; Dommen, J.; Wiesen, Peter; Pr{é}v{{\^o}}t, Andre S. H.
Nocturnal trans-alpine transport of ozone and its effects on air quality on the Swiss Plateau
Atmospheric Environment, 38 (27) :4539-4550
2004
Herausgeber: Pergamon
DOI: 10.1016/J.ATMOSENV.2004.05.008; 1298.
Steinbacher, M.; Henne, S.; Dommen, J.; Wiesen, Peter; Prévôt, Andre S. H.
Nocturnal trans-alpine transport of ozone and its effects on air quality on the Swiss Plateau
Atmospheric Environment, 38 (27) :4539-4550
2004
Herausgeber: Pergamon
DOI: 10.1016/J.ATMOSENV.2004.05.008; 1297.
McKeachie, J. Ryan; Appel, Matthew F.; Kirchner, Ulf; Schindler, Ralph N.; Benter, Thorsten
Observation of a heterogeneous source of OClO from the reaction of ClO radicals on ice
Journal of Physical Chemistry B, 108 (43) :16786-16797
2004
DOI: 10.1021/jp049314p; 1296.
McKeachie, J. Ryan; Appel, Matthew F.; Kirchner, Ulf; Schindler, Ralph N.; Benter, Thorsten
Observation of a heterogeneous source of OClO from the reaction of ClO radicals on ice
Journal of Physical Chemistry B, 108 (43) :16786-16797
2004
DOI: 10.1021/jp049314p; 1295.
McKeachie, J. Ryan; Appel, Matthew F.; Kirchner, Ulf; Schindler, Ralph N.; Benter, Thorsten
Observation of a heterogeneous source of OClO from the reaction of ClO radicals on ice
Journal of Physical Chemistry B, 108 (43) :16786-16797
2004
DOI: 10.1021/jp049314p; 1294.
Buckwar, E.; Winkler, R.
On two-step schemes for SDEs with small noise
PAMM, 4 (1) :15-18
2004

Computational Magnetics

Research Questions

Cooperation

Former and ongoing projects

Publications

1318.

1317.

1316.

1315.

1314.

1313.

1312.

1311.

1310.

1309.

1308.

1307.

1306.

1305.

1304.

1303.

1302.

1301.

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1299.

1298.

1297.

1296.

1295.

1294.