61 citations · 329 across the 55 of their papers we have counts for
30 papers · 1 filter
Simplification of the Isotropic Generalized Stop-Type Prandtl-Ishlinskii Vector Hysteresis Operator Using Analytical Return-Point Mapping
Arvinth Shankar, Klaus Kuhnen, Iryna Kulchytska-Ruchka +1
While the thermodynamically formulated generalized Prandtl-Ishlinskii stop-type operator effectively captures hysteresis nonlinearities, it requires a local iterative procedure to…
Accelerating Industrial Finite Element Simulations of Electric Machines based on Runtime Analysis
Arvinth Shankar, Iryna Kulchytska-Ruchka, Sebastian Schöps
The simulation of electric machines plays a significant role in the design of efficient and competitive products. Faster simulations reduce computational costs, such as CPU hours,…
The CREATOR Project: Towards a Computational Electric Machine Laboratory
Sebastian Schöps, Annette Muetze, Herbert De Gersem +3
The Collaborative Research Centre TRR 361/F90 CREATOR (2022-2030) aims at establishing a new paradigm for the simulation-driven design of electric machines. Increasing demands on e…
Subdivision-based isogeometric analysis for axisymmetric electromagnetic problems
Devin Balian, Sebastian Schöps, Melina Merkel
This paper applies a subdivision-based isogeometric method to solve the axisymmetric Maxwell eigenvalue problem. The reduction to an -formulation allows to use a Catmull-Clark…
On the Application of Hybrid Mixed Domain Decomposition Methods to Permanent Magnet Synchronous Machines
Timon Seibel, Sebastian Schöps, Kersten Schmidt
In this work, we study the application of a hybrid mixed domain decomposition(HMDD) method for the rotor-stator coupling of a permanent magnet synchronous machine. For this, we der…
A non-intrusive approach to index-aware learning
Peter Förster, Idoia Cortes Garcia, Wil Schilders +1
We present a non-intrusive version of the index-aware learning framework introduced in arXiv:2309.00958. Index-aware learning itself is an approach for learning the time and parame…
Homogenization of HTS coils with the h, h-phi, and t-omega foil conductor model
Elias Paakkunainen, Louis Denis, Benoît Vanderheyden +3
Efficient numerical models are required for the design of systems with high temperature superconductor (HTS) coils, as fully resolved finite element simulations of individual coate…
Characterization of Permanent Magnet Synchronous Machines based on semi-analytic model reduction for drive cycle analysis
Leon Blumrich, Yves Burkhardt, Sebastian Schöps
The characterization of an interior permanent magnet synchronous machine (IPMSM) requires numerical analysis of the nonlinear magnetic motor model in different load conditions. To…
Isogeometric Shape Optimization of Multi-Tapered Coaxial Baluns Simulated by an Integral Equation Method
Boian Balouchev, Jürgen Dölz, Maximilian Nolte +2
We discuss the advantages of a spline-based freeform shape optimization approach using the example of a multi-tapered coaxial balun connected to a spiral antenna. The underlying si…
A Mixed Tree-Cotree Gauge for the Reduced Basis Approximation of Maxwell's Eigenvalue Problem
Anna Ziegler, Sebastian Schöps
Model order reduction methods are a powerful tool to drastically reduce the computational effort of problems which need to be evaluated repeatedly, i.e., when computing the same sy…
Mortar Thin Shell Approximation for Analysis of Superconducting Accelerator Magnets
Robert Hahn, Erik Schnaubelt, Mariusz Wozniak +2
Thin layers can lead to unfavorable meshes in a finite element (FE) analysis. Thin shell approximations (TSAs) avoid this issue by removing the need for a mesh of the thin layer wh…
Parallel-in-Time Integration of Transient Phenomena in No-Insulation Superconducting Coils Using Parareal
Erik Schnaubelt, Mariusz Wozniak, Julien Dular +3
High-temperature superconductors (HTS) have the potential to enable magnetic fields beyond the current limits of low-temperature superconductors in applications like accelerator ma…
Gradient-Based Eigenvalue Optimization for Electromagnetic Cavities with Built-in Mode Matching
Anna Ziegler, Robert Hahn, Victoria Isensee +2
Shape optimization with respect to eigenvalues of a cavity plays an important role in the design of new resonators or in the optimization of existing ones. In our paper, we propose…
Index-aware learning of circuits
Idoia Cortes Garcia, Peter Förster, Lennart Jansen +2
Electrical circuits are present in a variety of technologies, making their design an important part of computer aided engineering. The growing number of parameters that affect the…
Rational kernel-based interpolation for complex-valued frequency response functions
Julien Bect, Niklas Georg, Ulrich Römer +1
This work is concerned with the kernel-based approximation of a complex-valued function from data, where the frequency response function of a partial differential equation in the f…
Aspects of Coupled Problems in Computational Electromagnetics Formulations
Markus Clemens, Sebastian Schöps, Carsten Cimala +4
This paper addresses different aspects of "coupled" model descriptions in computational electromagnetics. This includes domain decomposition, multiscale problems, multiple or hybri…
Solving Maxwell's Eigenvalue Problem via Isogeometric Boundary Elements and a Contour Integral Method
Stefan Kurz, Sebastian Schöps, Gerhard Unger +1
We solve Maxwell's eigenvalue problem via isogeometric boundary elements and a contour integral method. We discuss the analytic properties of the discretisation, outline the implem…
Uncertainty Quantification For A Permanent Magnet Synchronous Machine With Dynamic Rotor Eccentricity
Zeger Bontinck, Oliver Lass, Herbert De Gersem +1
The influence of dynamic eccentricity on the harmonic spectrum of the torque of a permanent magnet synchronous machine is studied. The spectrum is calculated by an energy balance m…
Solving nonlinear circuits with pulsed excitation by multirate partial differential equations
Andreas Pels, Johan Gyselinck, Ruth V. Sabariego +1
In this paper the concept of Multirate Partial Differential Equations (MPDEs) is applied to obtain an efficient solution for nonlinear low-frequency electrical circuits with pulsed…
Reduced Order Modelling for the Simulation of Quenches in Superconducting Magnets
Sebastian Schöps, Idoia Cortes Garcia, Michał Maciejewski +1
This contributions discusses the simulation of magnetothermal effects in superconducting magnets as used in particle accelerators. An iterative coupling scheme using reduced order…
Survey on Semi-Explicit Time Integration of Eddy Current Problems
Jennifer Dutiné, Markus Clemens, Sebastian Schöps
The spatial discretization of the magnetic vector potential formulation of magnetoquasistatic field problems results in an infinitely stiff differential-algebraic equation system.…
Recent Advances of Isogeometric Analysis in Computational Electromagnetics
Zeger Bontinck, Jacopo Corno, Herbert De Gersem +8
In this communication the advantages and drawbacks of the isogeometric analysis (IGA) are reviewed in the context of electromagnetic simulations. IGA extends the set of polynomial…
Explicit Time Integration of Transient Eddy Current Problems
Jennifer Dutiné, Markus Clemens, Sebastian Schöps +1
For time integration of transient eddy current problems commonly implicit time integration methods are used, where in every time step one or several nonlinear systems of equations…
GPU Accelerated Explicit Time Integration Methods for Electro-Quasistatic Fields
Christian Richter, Sebastian Schöps, Markus Clemens
Electro-quasistatic field problems involving nonlinear materials are commonly discretized in space using finite elements. In this paper, it is proposed to solve the resulting syste…