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.
2D Simulation of a Transformer
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
2988.
[german] Bohrmann-Linde, Claudia; Spinnen, Sebastian; Sahling, P.
Von der Babywindel zur transparenten Solarzelle - neue photogalvanische Zellen mit Nano-Titandioxid
Praxis der Naturwissenschaften - Chemie in der Schule, 64 (1) :10-15
20152987.
Schott, Sabrina
Weichmacher in Plastik - Gesamtgehaltbestimmung und Migrationsuntersuchungen von Phthalaten in Kuunststoffen mittels GC-MS
20152986.
Farkas, Bálint
Wiener's lemma and the Jacobs--de Leeuw--Glicksberg decomposition
Annales Univ. Sci. Budapest, Sec. Math., Sebesty{\~A}©n Festschrift, 58 :27--35
2015- 2014
2985.
Göstl, Robert; Hecht, Stefan
Controlling Covalent Connection and Disconnection with Light
Angewandte Chemie International Edition, 53 (33) :8784--8787
August 2014
ISSN: 1521-37732984.
Göstl, Robert; Hecht, Stefan
Kontrolle über Bildung und Bruch kovalenter Verknüpfungen durch Licht
Angewandte Chemie, 126 (33) :8929--8932
August 2014
ISSN: 1521-37572983.
Tasi{\'{c}}, Bratislav; Dohmen, Jos J.; Maten, E. Jan W.; Beelen, Theo G.J.; Schilders, Wil H. A.; Vries, Alex; Beurden, Maikel
Robust {DC} and efficient time-domain fast fault simulation
{COMPEL} - The international journal for computation and mathematics in electrical and electronic engineering, 33 (4) :1161--1174
Juli 2014
Herausgeber: Emerald2982.
Göstl, Robert; Senf, Antti; Hecht, Stefan
Remote-controlling chemical reactions by light: Towards chemistry with high spatio-temporal resolution
Chemical Society Reviews, 43 (6) :1982-1996
Februar 2014
ISSN: 1460-47442981.
Teng, Long; Ehrhardt, Matthias; G\"unther, Michael
The Pricing of {Quanto} Options under Dynamic Correlation
In J. Vigo-Aguiar, Editor, Proceedings of the 14th International Conference on Computational and Mathematical Methods in Science and Engineering, CMMSE 2014, July 3-7, 2014, Cadiz, SpainBand1, Seite 1228--1238
In J. Vigo-Aguiar, Editor
Herausgeber: Elsevier {BV}
Februar 20142980.
Bredenkamp, A.; Kirsch, S. F.
1,2-Dihaloalkenes (Update 2014)
Science of Synthesis, Knowledge Updates (4) :425–460
20142979.
Speck, R.; Ruprecht, D.; Emmett, M.; Bolten, M.; Krause, R.
A space-time parallel solver for the three-dimensional heat equation
In M. Bader and A. Bode and H.-J. Bungartz and M. Gerndt and G.R. Joubert and F. Peters, Editor, Parallel Computing: Accelerating Computational Science and Engineering (CSE)Band25ausAdvances in Parallel Computing 25, Seite 263--272
In M. Bader and A. Bode and H.-J. Bungartz and M. Gerndt and G.R. Joubert and F. Peters, Editor
Herausgeber: IOS Press
20142978.
Speck, R.; Ruprecht, D.; Emmett, M.; Bolten, Matthias; Krause, R.
A space-time parallel solver for the three-dimensional heat equation
In M. Bader and A. Bode and H.-J. Bungartz and M. Gerndt and G.R. Joubert and F. Peters, Editor, Parallel Computing: Accelerating Computational Science and Engineering (CSE)Band25ausAdvances in Parallel Computing 25, Seite 263-272
In M. Bader and A. Bode and H.-J. Bungartz and M. Gerndt and G.R. Joubert and F. Peters, Editor
Herausgeber: IOS Press
20142977.
Speck, R.; Ruprecht, D.; Emmett, M.; Bolten, M.; Krause, R.
A space-time parallel solver for the three-dimensional heat equation
In M. Bader and A. Bode and H.-J. Bungartz and M. Gerndt and G.R. Joubert and F. Peters, Editor, Parallel Computing: Accelerating Computational Science and Engineering (CSE)Band25ausAdvances in Parallel Computing 25, Seite 263-272
In M. Bader and A. Bode and H.-J. Bungartz and M. Gerndt and G.R. Joubert and F. Peters, Editor
Herausgeber: IOS Press
20142976.
Dächert, Kerstin
Adaptive Parametric Scalarizations in Multicriteria Optimization
Dissertation
Dissertation
Bergische Universität Wuppertal
20142975.
Ehrhardt, Matthias; Sánchez, Lucas Jódar; Villanueva Micó, Rafael Jacinto
Advanced computational engineering
20142974.
Ehrhardt, Matthias; Sánchez, Lucas Jódar; Villanueva Micó, Rafael Jacinto
Advanced computational engineering
International Journal of Computer Mathematics, 91 (1) :1–3
2014
Herausgeber: Taylor & Francis2973.
Ehrhardt, Matthias; Sánchez, Lucas Jódar; Villanueva Micó, Rafael Jacinto
Advanced computational engineering
International Journal of Computer Mathematics, 91 (1) :1–3
2014
Herausgeber: Taylor & Francis2972.
Advanced Mathematical Models and Numerical Techniques for Multiband Effective Mass Approximations
In M. Ehrhardt and Th. Koprucki, Editor, Band 94 aus LNCSE
Herausgeber: Springer, Heidelberg
20142971.
Jacob, Birgit; Partington, Jonathan R.; Pott, Sandra
Applications of {L}aplace-{C}arleson embeddings to admissibility and controllability
SIAM J. Control Optim., 52 (2) :1299--1313
20142970.
Jacob, Birgit; Partington, Jonathan R.; Pott, Sandra
Applications of Laplace-Carleson embeddings to admissibility and controllability
SIAM J. Control Optim., 52 (2) :1299--1313
20142969.
Klee, Sonja; Derpmann, Valerie; Wissdorf, Walter; Klopotowski, Sebastian; Kersten, Hendrik; Brockmann, Klaus Josef; Benter, Thorsten; Albrecht, Sascha; Bruins, Andries P.; Dousty, Faezeh; Kauppila, Tiina J.; Kostiainen, Risto; O'Brien, Rob; Robb, Damon B.; Syage, Jack A.
Are Clusters Important in Understanding the Mechanisms in Atmospheric Pressure Ionization? Part 1: Reagent Ion Generation and Chemical Control of Ion Populations
Journal of The American Society for Mass Spectrometry, 25 (8) :1310-1321
20142968.
Klee, Sonja; Derpmann, Valerie; Wissdorf, Walter; Klopotowski, Sebastian; Kersten, Hendrik; Brockmann, Klaus Josef; Benter, Thorsten; Albrecht, Sascha; Bruins, Andries P.; Dousty, Faezeh; Kauppila, Tiina J.; Kostiainen, Risto; O'Brien, Rob; Robb, Damon B.; Syage, Jack A.
Are Clusters Important in Understanding the Mechanisms in Atmospheric Pressure Ionization? Part 1: Reagent Ion Generation and Chemical Control of Ion Populations
Journal of The American Society for Mass Spectrometry, 25 (8) :1310-1321
20142967.
Klee, Sonja; Derpmann, Valerie; Wißdorf, Walter; Klopotowski, Sebastian; Kersten, Hendrik; Brockmann, Klaus Josef; Benter, Thorsten; Albrecht, Sascha; Bruins, Andries P.; Dousty, Faezeh; Kauppila, Tiina J.; Kostiainen, Risto; O'Brien, Rob; Robb, Damon B.; Syage, Jack A.
Are Clusters Important in Understanding the Mechanisms in Atmospheric Pressure Ionization? Part 1: Reagent Ion Generation and Chemical Control of Ion Populations
Journal of The American Society for Mass Spectrometry, 25 (8) :1310-1321
20142966.
Linnhoff, Luisa
Biodiversität und Naturverjüngung auf Kyrill-Sturmflächen
20142965.
Ankirchner, Stefan; Jeanblanc, Monique; Kruse, Thomas
BSDEs with singular terminal condition and a control problem with constraints
SIAM Journal on Control and Optimization, 52 (2) :893--913
2014
Herausgeber: SIAM2964.
Ankirchner, Stefan; Jeanblanc, Monique; Kruse, Thomas
BSDEs with singular terminal condition and a control problem with constraints
SIAM Journal on Control and Optimization, 52 (2) :893–913
2014
Herausgeber: Society for Industrial and Applied Mathematics
