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
- 2004
1304.
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: Pergamon1303.
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: Pergamon1302.
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
20041301.
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
20041300.
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
20041299.
Buckwar, E.; Winkler, R.
On two-step schemes for SDEs with small noise
PAMM, 4 (1) :15-18
20041298.
Bartel, Andreas
Partial differential algebraic models in chip design — thermal and semiconductor problems
20041297.
Bartel, Andreas
Partial Differential Algebraic Models in Chip Design-Thermal and Semiconductor Problems
Herausgeber: VDI-Verlag
20041296.
Bartel, A.:
Partial Differential-Algebraic Models in Chip-Design — Thermal and Semiconductor Problems
TU Munich, Fortschritt-Berichte, VDI Verlag, Düsseldorf
20041295.
Farkas, Bálint
Perturbations of bi-continuous semigroups with applications to transition semigroups on C\sb b(H)
Semigroup Forum, 68 (1) :87-107
20041294.
Melnikov, Vladlen V.; Jensen, Per
Potential energy surface and spectroscopic parameters of X\verb=~=\(^{3}\)\(\Sigma\)\(^{-}\) CNN
Chemical Physics Letters, 394 (1-3) :171-175
20041293.
Melnikov, Vladlen V.; Jensen, Per
Potential energy surface and spectroscopic parameters of X\verb=~=\(^{3}\)\(\Sigma\)\(^{-}\) CNN
Chemical Physics Letters, 394 (1-3) :171-175
20041292.
Melnikov, Vladlen V.; Jensen, Per
Potential energy surface and spectroscopic parameters of X~3Σ- CNN
Chemical Physics Letters, 394 (1-3) :171-175
20041291.
G\"unther, Michael
Preconditioned splitting in dynamic iteration schemes for coupled {DAE} systems in {RC} network design
In A. Buikis and et al., Editor, Progress in Industrial Mathematics at ECMI 2002
Seite 173--177
Herausgeber: Springer-Verlag, Berlin
2004
173--1771290.
Günther, Michael
Preconditioned splitting in dynamic iteration schemes for coupled DAE systems in RC network design
In Buikis, Andris and Čiegis, Raimondas and Fitt, Alistair D., Editor, Progress in Industrial Mathematics at ECMI 2002ausThe European Consortium for Mathematics in Industry, Seite 173–177
In Buikis, Andris and Čiegis, Raimondas and Fitt, Alistair D., Editor
Herausgeber: Springer Berlin Heidelberg
20041289.
Günther, Michael
Preconditioned splitting in dynamic iteration schemes for coupled DAE systems in RC network design
In Buikis, Andris and Čiegis, Raimondas and Fitt, Alistair D., Editor, Progress in Industrial Mathematics at ECMI 2002ausThe European Consortium for Mathematics in Industry, Seite 173–177
In Buikis, Andris and Čiegis, Raimondas and Fitt, Alistair D., Editor
Herausgeber: Springer Berlin Heidelberg
20041288.
Günther, Michael
Preconditioned splitting in dynamic iteration schemes for coupled dae systems in rc network design
Progress in Industrial Mathematics at ECMI 2002, Seite 173--177
Springer Berlin Heidelberg
20041287.
Kirsch, Stefan; Ackermann, Olaf; Harms, Klaus; Bach, Thorsten
Regioselective Isomerisation of Highly Substituted 1-Methylenecyclohexenepoxides to the Corresponding Allylic Alcohols. Influence of the Base and of the Protecting Groups
Monatshefte für Chemie / Chemical Monthly, 135 (6) :713–727
2004
ISSN: 1434-44751286.
Kirsch, Stefan; Ackermann, Olaf; Harms, Klaus; Bach, Thorsten
Regioselective Isomerisation of Highly Substituted 1-Methylenecyclohexenepoxides to the Corresponding Allylic Alcohols. Influence of the Base and of the Protecting Groups
Monatshefte für Chemie / Chemical Monthly, 135 (6) :713–727
2004
ISSN: 1434-44751285.
Borkowska-Burnecka, J.; Zyrnicki, W.; Setzer, Klaus-Dieter; Fink, Ewald H.
Rotational and vibrational temperatures measured in a chemiluminescent flame from FTIR Bi\(_{2}\) emission spectra
Journal of Quantitative Spectroscopy and Radiative Transfer, 86 (1) :87-95
2004
Herausgeber: Pergamon1284.
Borkowska-Burnecka, J.; Zyrnicki, W.; Setzer, Klaus-Dieter; Fink, Ewald H.
Rotational and vibrational temperatures measured in a chemiluminescent flame from FTIR Bi\(_{2}\) emission spectra
Journal of Quantitative Spectroscopy and Radiative Transfer, 86 (1) :87-95
2004
Herausgeber: Pergamon1283.
Borkowska-Burnecka, J.; Zyrnicki, W.; Setzer, Klaus-Dieter; Fink, Ewald H.
Rotational and vibrational temperatures measured in a chemiluminescent flame from FTIR Bi2 emission spectra
Journal of Quantitative Spectroscopy and Radiative Transfer, 86 (1) :87-95
2004
Herausgeber: Pergamon1282.
Scientific Computing in Electrical Engineering -- Proceedings of the SCEE-2002 conference held in Eindhoven
In Schilders, W. H. A. and ter Maten, E. J. W. and Houben, S. H. M. J., Editor, Band 4 aus Mathematics in Industry
Herausgeber: Springer Berlin Heidelberg
2004ISBN: 3540213724
1281.
Appel, Matthew F.; McKeachie, J. Ryan; Veer, Wytze E.; Benter, Thorsten
Simple induction probe electric field meter for the detection of electrical fields generated by ion-optical electrodes
Review of Scientific Instruments, 75 (8) :2603-2607
20041280.
Appel, Matthew F.; McKeachie, J. Ryan; Veer, Wytze E.; Benter, Thorsten
Simple induction probe electric field meter for the detection of electrical fields generated by ion-optical electrodes
Review of Scientific Instruments, 75 (8) :2603-2607
2004
