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
- 2021
4666.
Baumann, Christoph; Stratigaki, Maria; Centeno, Silvia P.; Göstl, Robert
Mehrfarbige Mechanofluorophore für die quantitative Anzeige kovalenter Bindungsbrüche in Polymeren
Angewandte Chemie, 133 (24) :13398--13404
Juni 2021
ISSN: 1521-37574665.
Baumann, Christoph; Stratigaki, Maria; Centeno, Silvia P.; Göstl, Robert
Multicolor Mechanofluorophores for the Quantitative Detection of Covalent Bond Scission in Polymers
Angewandte Chemie International Edition, 60 (24) :13287--13293
Juni 2021
ISSN: 1521-37734664.
Grandrath, Rebecca
Brennstoffzell-Systeme mit Fokus auf biologischen Brennstoffzellen: Entwicklung und Optimierung von schulgeeigneten Experimenten, Konzepten und Medien. Dissertation.
Bergische Universität Wuppertal
Juni 20214663.
[german] Grandrath, Rebecca; Bohrmann-Linde, Claudia
Experimentieren mit interaktiven E-Books zu mikrobiellen Brennstoffzellen - Lerneinheiten für die Sekundarstufen I und II
MNU, 74 (3) :235-240
Juni 20214662.
Tausch, Michael W.; Bohrmann-Linde, Claudia
Nachhaltige Chemie mit Licht - Experimentelle Zugänge in digitalen Medien
CHEMKON, 28 (4) :147--154
Juni 20214661.
Zang, M.; Haussmann, N.; Stroka, S.; Mease, R.; Clemens, M.; Burkert, A.; Popp, A.; Schmuelling, B.
Personenschutz bei induktivem Laden von Fahrzeugbatterien -- Ansätze zur praktikablen Echtzeitbestimmung der magneto-quasistatischen Körperexposition
Wissenschaftsforum Mobilität, Duisburg, 17.06.2021. Full paper submitted, 2021.
Juni 20214660.
Göstl, Robert
Machen, zerstören, besser machen
Nachrichten aus der Chemie, 69 (5) :78--79
Mai 2021
ISSN: 1868-00544659.
[german] Zeller, Diana; Gökkus, Yasemin; Kremer, Richard; Bohrmann-Linde, Claudia
H5P-Videos in der chemiedidaktischen Lehre
CHEMKON, 28 (6) :245-248
Mai 20214658.
[english] Hoffmann, Heiko; Tausch, Michael W.
Intermolecular Photoredox Coupling: Alternative to Norrish Type II Reaction and Yang Cyclization in Ketones with γ-C-Bonds
European Journal of Organic Chemistry
Mai 20214657.
[german] Zeller, Diana; Grandrath, Rebecca; Bohrmann-Linde, Claudia
Digitale Lehr- und Lerntools für den Chemieunterricht mithilfe von Prezi und E-Books. Teil 3.
Chemie & Schule, 36 (2) :9-13
April 20214656.
Shi, Zhiyuan; Song, Qingchuan; Göstl, Robert; Herrmann, Andreas
Mechanochemical activation of disulfide-based multifunctional polymers for theranostic drug release
Chemical Science, 12 (5) :1668--1674
Februar 2021
ISSN: 2041-65394655.
Sun, Jing; Ma, Chao; Maity, Sourav; Wang, Fan; Zhou, Yu; Portale, Giuseppe; Göstl, Robert; Roos, Wouter H.; Zhang, Hongjie; Liu, Kai; Herrmann, Andreas
Reversibly Photo-Modulating Mechanical Stiffness and Toughness of Bioengineered Protein Fibers
Angewandte Chemie International Edition, 133 (6) :3259--3265
Februar 2021
ISSN: 1521-37574654.
Huo, Shuaidong; Zhao, Pengkun; Shi, Zhiyuan; Zou, Miancheng; Yang, Xintong; Warszawik, Eliza; Loznik, Mark; Göstl, Robert; Herrmann, Andreas
Mechanochemical bond scission for the activation of drugs
Nature Chemistry, 13 (2) :131--139
Februar 2021
ISSN: 1755-43494653.
Zhou, Yu; Huo, Shuaidong; Loznik, Mark; Göstl, Robert; Boersma, Arnold J.; Herrmann, Andreas
Controlling Optical and Catalytic Activity of Genetically Engineered Proteins by Ultrasound
Angewandte Chemie International Edition, 60 (3) :1493--1497
Januar 2021
ISSN: 1521-37734652.
Zhou, Yu; Huo, Shuaidong; Loznik, Mark; Göstl, Robert; Boersma, Arnold J.; Herrmann, Andreas
Kontrolle über die optische und katalytische Aktivität gentechnisch hergestellter Proteine mit Ultraschall
Angewandte Chemie, 133 (3) :1515--1519
Januar 2021
ISSN: 1521-37574651.
Bannenberg, MWFM; Ciccazzo, A
A Combination of Model Order Reduction and Multirate Techniques for Coupled Dynamical Systems
Scientific Computing in Electrical Engineering: SCEE 2020, Eindhoven, The Netherlands, February 2020, Seite 191–199
Herausgeber: Springer International Publishing
20214650.
Bannenberg, MWFM; Ciccazzo, A
A Combination of Model Order Reduction and Multirate Techniques for Coupled Dynamical Systems
Scientific Computing in Electrical Engineering: SCEE 2020, Eindhoven, The Netherlands, February 2020
Seite 191--199
Herausgeber: Springer International Publishing Cham
2021
191--1994649.
Bannenberg, MWFM; Ciccazzo, A
A Combination of Model Order Reduction and Multirate Techniques for Coupled Dynamical Systems
Scientific Computing in Electrical Engineering: SCEE 2020, Eindhoven, The Netherlands, February 2020, Seite 191–199
Herausgeber: Springer International Publishing
20214648.
Pauly, Dirk; Skrepek, Nathanael
A Compactness Result for the div-curl System with Inhomogeneous Mixed Boundary Conditions for Bounded Lipschitz Domains and Some Applications
20214647.
Güttel, Stefan; Schweitzer, Marcel
A comparison of limited-memory Krylov methods for Stieltjes functions of Hermitian matrices
SIAM J. Matrix Anal. Appl., 42 (1) :83-107
20214646.
Güttel, Stefan; Schweitzer, Marcel
A comparison of limited-memory Krylov methods for Stieltjes functions of Hermitian matrices
SIAM J. Matrix Anal. Appl., 42 (1) :83-107
20214645.
Güttel, Stefan; Schweitzer, Marcel
A comparison of limited-memory Krylov methods for Stieltjes functions of Hermitian matrices
SIAM J. Matrix Anal. Appl., 42 (1) :83-107
20214644.
Edeko, Nikolai; Haase, Markus; Kreidler, Henrik
A Decomposition Theorem for Unitary Group Representations on Kaplansky-Hilbert Modules and the Furstenberg-Zimmer Structure Theorem
20214643.
Clevenhaus, Anna; Totzeck, Claudia; Ehrhardt, Matthias
A gradient descent algorithm for the Heston model
Preprint IMACM
2021
Herausgeber: Bergische Universität Wuppertal4642.
Clevenhaus, Anna; Totzeck, Claudia; Ehrhardt, Matthias
A gradient descent algorithm for the Heston model
Preprint IMACM
2021
Herausgeber: Bergische Universität Wuppertal
