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
- 2019
4067.
Rivela, Cynthia B.; Tovar, Carmen M.; Gibilisco, Rodrigo G.; Teruel, Mariano A.; Barnes, Ian; Wiesen, Peter; Blanco, Mar{í}a B.
Product distribution and mechanism of the OH\(^{-}\) initiated tropospheric degradation of three CFC replacement candidates: CH\(_{3}\)CF=CH\(_{2}\), (CF\(_{3}\))\(_{2}\)C=CH\(_{2}\) and (E/Z)-CF\(_{3}\)CF=CHF
RSC Advances, 9 (10) :5592-5598
20194066.
Rivela, Cynthia B.; Tovar, Carmen M.; Gibilisco, Rodrigo G.; Teruel, Mariano A.; Barnes, Ian; Wiesen, Peter; Blanco, María B.
Product distribution and mechanism of the OH- initiated tropospheric degradation of three CFC replacement candidates: CH3CF=CH2, (CF3)2C=CH2 and (E/Z)-CF3CF=CHF
RSC Advances, 9 (10) :5592-5598
20194065.
QUANTUM NETWORKS WITH REFLECTIONLESS BRANCHING POINTS
BUKHARA--SAMARKAND--TASHKENT, 16 :142
20194064.
Gabbana, A.; Simeoni, D.; Succi, S.; Tripiccione, R.
Relativistic dissipation obeys Chapman-Enskog asymptotics: Analytical and numerical evidence as a basis for accurate kinetic simulations
Physical Review E, 99 :052126
2019
Herausgeber: American Physical Society4063.
Hirano, Tsuneo; Nagashima, Umpei; Jensen, Per; Li, Hui
Ro-vibrationally averaged dipole moments of linear triatomic molecules
Journal of Molecular Spectroscopy, 362 :29-36
2019
Herausgeber: Academic Press4062.
Hirano, Tsuneo; Nagashima, Umpei; Jensen, Per; Li, Hui
Ro-vibrationally averaged dipole moments of linear triatomic molecules
Journal of Molecular Spectroscopy, 362 :29-36
2019
Herausgeber: Academic Press4061.
Hirano, Tsuneo; Nagashima, Umpei; Jensen, Per; Li, Hui
Ro-vibrationally averaged dipole moments of linear triatomic molecules
Journal of Molecular Spectroscopy, 362 :29-36
2019
Herausgeber: Academic Press4060.
Putek, Piotr; Maten, E Jan W; Günther, Michael; Bartel, Andreas; Pulch, Roland; Meuris, Peter; Schoenmaker, Wim
Robust Shape Optimization under Uncertainties in Device Materials, Geometry and Boundary Conditions
Nanoelectronic Coupled Problems Solutions :223--260
2019
Herausgeber: Springer International Publishing4059.
Putek, Piotr; Maten, E. Jan W.; Günther, Michael; Bartel, Andreas; Pulch, Roland; Meuris, Peter; Schoenmaker, Wim
Robust shape optimization under uncertainties in device materials, geometry and boundary conditions
In ter Maten, E. Jan W. and Brachtendorf, Hans-Georg and Pulch, Roland and Schoenmaker, Wim and De Gersem, Herbert, Editor aus Mathematics in Industry
Seite 223–260
Herausgeber: Springer Cham
2019
223–2604058.
Putek, Piotr; Maten, E. Jan W.; Günther, Michael; Bartel, Andreas; Pulch, Roland; Meuris, Peter; Schoenmaker, Wim
Robust shape optimization under uncertainties in device materials, geometry and boundary conditions
In ter Maten, E. Jan W. and Brachtendorf, Hans-Georg and Pulch, Roland and Schoenmaker, Wim and De Gersem, Herbert, Editor aus Mathematics in Industry
Seite 223–260
Herausgeber: Springer Cham
2019
223–2604057.
Günther, Michael; Brendel, Andreas; Kellermann, Walter
Single-channel signal features for estimating microphone utility for coherent signal processing
20194056.
Ehrhardt, Matthias; Gašper, Ján; Kilianová, Sona
SIR-based mathematical modeling of infectious diseases with vaccination and waning immunity
Journal of Computational Science, 37 :101027
2019
Herausgeber: Elsevier4055.
Ehrhardt, Matthias; Gašper, Ján; Kilianová, Sona
SIR-based mathematical modeling of infectious diseases with vaccination and waning immunity
Journal of Computational Science, 37 :101027
2019
Herausgeber: Elsevier4054.
Ehrhardt, Matthias; Gašper, Ján; Kilianová, Sona
SIR-based mathematical modeling of infectious diseases with vaccination and waning immunity
Journal of Computational Science, 37 :101027
2019
Herausgeber: Elsevier4053.
Zeller, Diana; Bohrmann-Linde, Claudia
Solar Cells with Titanium Dioxide
2019
Wuppertal4052.
Zeller, Diana; Bohrmann-Linde, Claudia
Solarzellen mit Titandioxid [Lehrerband]
2019
Wuppertal4051.
Zeller, Diana; Bohrmann-Linde, Claudia
Solarzellen mit Titandioxid [Schülerband]
2019
Wuppertal4050.
[german] Zeller, Diana; Bohrmann-Linde, Claudia
Sommer, Sonne, Titandioxid
Nachrichten aus der Chemie, 67 (7-8) :16-19
20194049.
Ankirchner, Stefan; Kazi-Tani, Nabil; Klein, Maike; Kruse, Thomas
Stopping with expectation constraints: 3 points suffice
Electronic Journal of Probability, 24 :1--16
2019
Herausgeber: Institute of Mathematical Statistics and Bernoulli Society4048.
Ankirchner, Stefan; Kazi-Tani, Nabil; Klein, Maike; Kruse, Thomas
Stopping with expectation constraints: 3 points suffice
Electronic Journal of Probability, 24 :1–16
2019
Herausgeber: Institute of Mathematical Statistics and Bernoulli Society4047.
Hagen, Ferdinand H. Farwick; Mathissen, Marcel; Grabiec, Tomasz; Hennicke, Tim; Rettig, Marc; Grochowicz, Jaroslaw; Vogt, Rainer; Benter, Thorsten
Study of Brake Wear Particle Emissions: Impact of Braking and Cruising Conditions
Environmental Science \& Technology, 53 (9) :5143-5150
20194046.
zum Hagen, Ferdinand H. Farwick; Mathissen, Marcel; Grabiec, Tomasz; Hennicke, Tim; Rettig, Marc; Grochowicz, Jaroslaw; Vogt, Rainer; Benter, Thorsten
Study of Brake Wear Particle Emissions: Impact of Braking and Cruising Conditions
Environmental Science & Technology, 53 (9) :5143-5150
20194045.
Hagen, Ferdinand H. Farwick; Mathissen, Marcel; Grabiec, Tomasz; Hennicke, Tim; Rettig, Marc; Grochowicz, Jaroslaw; Vogt, Rainer; Benter, Thorsten
Study of Brake Wear Particle Emissions: Impact of Braking and Cruising Conditions
Environmental Science \& Technology, 53 (9) :5143-5150
20194044.
Ottenbruch, Moritz; Mohr, Fabian
Synthesis of Sulfonylisoureas via Sulfo-Click Reactions
Synthesis, 52 (5) :695–702
2019
ISSN: 0039-7881, 1437-210X4043.
Wissdorf, Walter; Lorenz, Matthias; Brockmann, Klaus Josef; Benter, Thorsten
Systematic Ion Source Parameter Assessment by Automated Determination of the Distribution of Ion Acceptance (DIA) Using APLI
Journal of The American Society for Mass Spectrometry, 30 (7) :1262-1275
2019
Herausgeber: Journal of The American Society for Mass Spectrometry
