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

2015: 3128.
Minion, M. L.; Speck, R.; Bolten, Matthias; Emmett, M.; Ruprecht, D.
Interweaving PFASST and parallel multigrid
SIAM J. Sci. Comput., 37 (5) :S244-S263
2015
DOI: 10.1137/14097536X; 3127.
Minion, M. L.; Speck, R.; Bolten, M.; Emmett, M.; Ruprecht, D.
Interweaving PFASST and parallel multigrid
SIAM J. Sci. Comput., 37 (5) :S244-S263
2015
DOI: 10.1137/14097536X; 3126.
Minion, M. L.; Speck, R.; Bolten, M.; Emmett, M.; Ruprecht, D.
Interweaving PFASST and parallel multigrid
SIAM J. Sci. Comput., 37 (5) :S244-S263
2015
DOI: 10.1137/14097536X; 3125.
Kauppila, Tiina J.; Kersten, Hendrik; Benter, Thorsten
Ionization of EPA Contaminants in Direct and Dopant-Assisted Atmospheric Pressure Photoionization and Atmospheric Pressure Laser Ionization
Journal of The American Society for Mass Spectrometry, 26 (6) :1036-1045
2015
DOI: 10.1007/s13361-015-1092-3; 3124.
Kauppila, Tiina J.; Kersten, Hendrik; Benter, Thorsten
Ionization of EPA Contaminants in Direct and Dopant-Assisted Atmospheric Pressure Photoionization and Atmospheric Pressure Laser Ionization
Journal of The American Society for Mass Spectrometry, 26 (6) :1036-1045
2015
DOI: 10.1007/s13361-015-1092-3; 3123.
Kauppila, Tiina J.; Kersten, Hendrik; Benter, Thorsten
Ionization of EPA Contaminants in Direct and Dopant-Assisted Atmospheric Pressure Photoionization and Atmospheric Pressure Laser Ionization
Journal of The American Society for Mass Spectrometry, 26 (6) :1036-1045
2015
DOI: 10.1007/s13361-015-1092-3; 3122.
Heilmann, Margareta; Raşa, Ioan
k-th order Kantorovich type modification of linking Baskakov type operators
Mathematical Analysis and its Applications - Proceedings of the Conference ICRTMAA 2014, Roorkee, IndiaBand 143aus Springer Proceedings in Mathematics and Statistics, Seite 229-242
International Conference on Recent Trends in Mathematical Analysis and its Applications
Roorkee, India
December 2014
In Agrawal, P.N. and Mohapatra, R.N. and Singh, U. and Srivastava, H.M., Editor
Herausgeber: Springer
2015
DOI: 10.1007/978-81-322-2485-3; 3121.
Bejan, Iustinian; Duncianu, Marius; Olariu, Romeo; Barnes, Ian; Seakins, Paul W.; Wiesen, Peter
Kinetic study of the gas-phase reactions of chlorine atoms with 2-chlorophenol, 2-nitrophenol, and four methyl-2-nitrophenol isomers
Journal of Physical Chemistry A, 119 (20) :4735-4745
2015
DOI: 10.1021/acs.jpca.5b02392; 3120.
Bejan, Iustinian; Duncianu, Marius; Olariu, Romeo; Barnes, Ian; Seakins, Paul W.; Wiesen, Peter
Kinetic study of the gas-phase reactions of chlorine atoms with 2-chlorophenol, 2-nitrophenol, and four methyl-2-nitrophenol isomers
Journal of Physical Chemistry A, 119 (20) :4735-4745
2015
DOI: 10.1021/acs.jpca.5b02392; 3119.
Bejan, Iustinian; Duncianu, Marius; Olariu, Romeo; Barnes, Ian; Seakins, Paul W.; Wiesen, Peter
Kinetic study of the gas-phase reactions of chlorine atoms with 2-chlorophenol, 2-nitrophenol, and four methyl-2-nitrophenol isomers
Journal of Physical Chemistry A, 119 (20) :4735-4745
2015
DOI: 10.1021/acs.jpca.5b02392; 3118.
Blanco, Mar{í}a B.; Barnes, Ian; Wiesen, Peter; Teruel, Mariano A.
Kinetics of the reactions of Cl atoms with CF\(_{3}\)C(O)OCH\(_{3}\), CF\(_{3}\)C(O)OCH\(_{2}\)CH\(_{3}\), CF\(_{2}\)HC(O)OCH\(_{3}\) in the temperature range of 287-313K and 1atm
Chemical Physics Letters, 638 :15-20
2015
Herausgeber: North-Holland
DOI: 10.1016/j.cplett.2015.08.011; 3117.
Blanco, Mar{í}a B.; Barnes, Ian; Wiesen, Peter; Teruel, Mariano A.
Kinetics of the reactions of Cl atoms with CF\(_{3}\)C(O)OCH\(_{3}\), CF\(_{3}\)C(O)OCH\(_{2}\)CH\(_{3}\), CF\(_{2}\)HC(O)OCH\(_{3}\) in the temperature range of 287-313K and 1atm
Chemical Physics Letters, 638 :15-20
2015
Herausgeber: North-Holland
DOI: 10.1016/j.cplett.2015.08.011; 3116.
Blanco, María B.; Barnes, Ian; Wiesen, Peter; Teruel, Mariano A.
Kinetics of the reactions of Cl atoms with CF3C(O)OCH3, CF3C(O)OCH2CH3, CF2HC(O)OCH3 in the temperature range of 287-313K and 1atm
Chemical Physics Letters, 638 :15-20
2015
Herausgeber: North-Holland
DOI: 10.1016/j.cplett.2015.08.011; 3115.
Ehrhardt, Matthias
Mathematical modelling and numerical simulation of oil pollution problems
2015; 3114.

Mathematical Modelling and Numerical Simulation of Oil Pollution Problems
In Ehrhardt, Matthias, Editor aus The Reacting Atmosphere
Herausgeber: Springer Cham
2015
DOI: 10.1007/978-3-319-16459-5
ISBN: 978-3-319-16458-8; 3113.

Mathematical Modelling and Numerical Simulation of Oil Pollution Problems
In Ehrhardt, Matthias, Editor aus The Reacting Atmosphere
Herausgeber: Springer Cham
2015
DOI: 10.1007/978-3-319-16459-5
ISBN: 978-3-319-16458-8; 3112.
Tausch, Michael W.
Mehr Licht! Auch im Chemieunterricht!
{CHEMKON}, 22 (4) :161--161
2015
Herausgeber: Wiley
DOI: 10.1002/ckon.201410258; 3111.
Bolten, Matthias; Gottschalk, Hanno; Schmitz, S.
Minimal failure probability for ceramic design via shape control
J. Optim. Theory Appl., 166 :983-1001
2015
DOI: 10.1007/s10957-014-0621-8; 3110.
Bolten, M.; Gottschalk, Hanno; Schmitz, S.
Minimal failure probability for ceramic design via shape control
J. Optim. Theory Appl., 166 :983-1001
2015
DOI: 10.1007/s10957-014-0621-8; 3109.
Bolten, M.; Gottschalk, Hanno; Schmitz, S.
Minimal failure probability for ceramic design via shape control
J. Optim. Theory Appl., 166 :983---1001
2015
DOI: 10.1007/s10957-014-0621-8; 3108.
Striebel, M.; Pulch, R.; Maten, E. J. W.; Ilievski, Z.; Schilders, W. H. A.
Model order reduction and sensitivity analysis
In Günther, M., Editor, Coupled Multiscale Simulation and Optimization in Nanoelectronics Band 21 aus Mathematics in Industry
Kapitel 5.3, Seite 319--341 and 355--358
Herausgeber: Springer
2015
319--341 and 355--358; 3107.
Striebel, M.; Maten, E. J. W.
Model order reduction for nonlinear network problems
In Günther, M., Editor, Coupled Multiscale Simulation and Optimization in Nanoelectronics Band 21 aus Mathematics in Industry
Kapitel 6.1, Seite 362-380 and 426-428
Herausgeber: Springer
2015
362-380 and 426-428; 3106.
Antoulas, Athanasios C.; Ionutiu, Roxana; Martins, Nelson; Maten, E. Jan W.; Mohaghegh, Kasra; Pulch, Roland; Rommes, Joost; Saadvandi, Maryam; Striebel, Michael
Model order reduction: Methods, concepts and properties
In Günther, Michael, Editor
Seite 159–265
Herausgeber: Springer Berlin Heidelberg
2015
159–265
DOI: 10.1007/978-3-662-46672-8_4; 3105.
Antoulas, Athanasios C.; Ionutiu, Roxana; Martins, Nelson; Maten, E. Jan W.; Mohaghegh, Kasra; Pulch, Roland; Rommes, Joost; Saadvandi, Maryam; Striebel, Michael
Model Order Reduction: Methods, Concepts and Properties
In Günther, M., Editor, Coupled Multiscale Simulation and Optimization in Nanoelectronics Band 21 aus Mathematics in Industry
Kapitel 4, Seite 159--265
Herausgeber: Springer
2015
159--265
DOI: 10.1007/978-3-662-46672-8_4; 3104.
Antoulas, Athanasios C.; Ionutiu, Roxana; Martins, Nelson; Maten, E. Jan W.; Mohaghegh, Kasra; Pulch, Roland; Rommes, Joost; Saadvandi, Maryam; Striebel, Michael
Model order reduction: Methods, concepts and properties
In Günther, Michael, Editor
Seite 159–265
Herausgeber: Springer Berlin Heidelberg
2015
159–265
DOI: 10.1007/978-3-662-46672-8_4

Computational Magnetics

Research Questions

Cooperation

Former and ongoing projects

Publications

3128.

3127.

3126.

3125.

3124.

3123.

3122.

3121.

3120.

3119.

3118.

3117.

3116.

3115.

3114.

3113.

3112.

3111.

3110.

3109.

3108.

3107.

3106.

3105.

3104.