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
4118.
Putek, Piotr
Nonlinear magnetoquasistatic interface problem in a permanent-magnet machine with stochastic partial differential equation constraints
Engineering Optimization, 51 (12) :2169–2192
2019
Herausgeber: Taylor & Francis4117.
Adam, Ahmad Y.; Jensen, Per; Yachmenev, Andrey; Yurchenko, Sergey N.
Nonresonant Raman spectra of the methyl radical \(^{12}\)CH\(_{3}\) simulated in variational calculations
Journal of Molecular Spectroscopy, 362 :77-83
2019
Herausgeber: Academic Press4116.
Adam, Ahmad Y.; Jensen, Per; Yachmenev, Andrey; Yurchenko, Sergey N.
Nonresonant Raman spectra of the methyl radical \(^{12}\)CH\(_{3}\) simulated in variational calculations
Journal of Molecular Spectroscopy, 362 :77-83
2019
Herausgeber: Academic Press4115.
Adam, Ahmad Y.; Jensen, Per; Yachmenev, Andrey; Yurchenko, Sergey N.
Nonresonant Raman spectra of the methyl radical 12CH3 simulated in variational calculations
Journal of Molecular Spectroscopy, 362 :77-83
2019
Herausgeber: Academic Press4114.
Bolten, Matthias; Gottschalk, Hanno; Hahn, C.; Saadi, M.
Numerical shape optimization to decrease failure probability of ceramic structures
Comput. Vis. Sci., 21 :1-10
20194113.
Bolten, M.; Gottschalk, Hanno; Hahn, C.; Saadi, M.
Numerical shape optimization to decrease failure probability of ceramic structures
Comput. Vis. Sci., 21 :1-10
20194112.
Bolten, M.; Gottschalk, Hanno; Hahn, C.; Saadi, M.
Numerical shape optimization to decrease failure probability of ceramic structures
Comput. Vis. Sci., 21 :1-10
20194111.
Jacob, Birgit; Schwenninger, Felix L.; Zwart, Hans
On continuity of solutions for parabolic control systems and input-to-state stability
J. Differential Equations, 266 (10) :6284--6306
20194110.
Jacob, Birgit; Kaiser, Julia T.
On Exact Controllability of Infinite-Dimensional Linear Port-{H}amiltonian Systems
IEEE Control Systems Letters, 3 (3) :661-666
20194109.
Jacob, Birgit; Kaiser, Julia T.
On Exact Controllability of Infinite-Dimensional Linear Port-Hamiltonian Systems
IEEE Control Systems Letters, 3 (3) :661-666
20194108.
Weinan, E; Hutzenthaler, Martin; Jentzen, Arnulf; Kruse, Thomas
On multilevel Picard numerical approximations for high-dimensional nonlinear parabolic partial differential equations and high-dimensional nonlinear backward stochastic differential equations
Journal of Scientific Computing, 79 (3) :1534--1571
2019
Herausgeber: Springer4107.
E, Weinan; Hutzenthaler, Martin; Jentzen, Arnulf; Kruse, Thomas
On multilevel Picard numerical approximations for high-dimensional nonlinear parabolic partial differential equations and high-dimensional nonlinear backward stochastic differential equations
Journal of Scientific Computing, 79 (3) :1534–1571
2019
Herausgeber: Springer New York4106.
Harbrecht, Helmut; Zaspel, Peter
On the Algebraic Construction of Sparse Multilevel Approximations of Elliptic Tensor Product Problems
J. Sci. Comput., 78 (2) :1272-1290
2019
ISSN: 1573-76914105.
Klamroth, Kathrin; Stiglmayr, Michael; Volkert, Klaus; Kraus, Konstantin; Reiners, Malena
Optimierung als Bindeglied zwischen Schule, Anwendung und Forschung 3
In Klamroth, Kathrin and Stiglmayr, Michael and Volkert, Klaus and Kraus, Konstantin and Reiners, Malena, Editor, Band 3
20194104.
Calore, E; Gabbana, A; Schifano, SF; Tripiccione, R
Optimization of lattice Boltzmann simulations on heterogeneous computers
The International Journal of High Performance Computing Applications, 33 (1) :124–139
2019
Herausgeber: SAGE Publications4103.
Organometallic gold catalysis in combination with enzyme, organo-, or transition-metal catalysis
Science of Synthesis, Knowledge Updates (1) :1–64
20194102.
Ballaschk, Frederic
Oxidation of secondary alcohols using solid-supported hypervalent iodine catalysts
Green Chemistry :5896–5903
2019
ISSN: 1463-92704101.
Brunnert, Rainer; Bohrmann-Linde, Claudia; Meuter, Nico; Pereira Vaz, Nuno; Spinnen, Sebastian; Yurdanur, Yasemin; Tausch, Michael W.
Photons and Molecules: Basic Concepts of Photochemistry in Video Tutorials
, EPA Newsletter Band 96 aus EPA Newsletter
Seite 70-77
Herausgeber: Norbert Hoffmann
2019
70-774100.
Ehrhardt, Matthias
Preprint Elliptical and Archimedean copula models: an application to the price estimation of portfolio credit derivatives
20194099.
Bartel, Andreas; Günther, Michael
Preprint Inter/extrapolation-based multirate schemes—perspective
20194098.
Ehrhardt, Matthias; Vázquez, Carlos
Pricing swing options in electricity markets with two stochastic factors: PIDE modeling and numerical solution
3rd International Conference on Computational Finance (ICCF2019), Seite 89–90
Herausgeber: Universidade da Coruña
20194097.
Ehrhardt, Matthias; Vázquez, Carlos
Pricing swing options in electricity markets with two stochastic factors: PIDE modeling and numerical solution
3rd International Conference on Computational Finance (ICCF2019), Seite 89–90
Herausgeber: Universidade da Coruña
20194096.
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
20194095.
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
20194094.
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
2019
