36 citations · 287 across the 41 of their papers we have counts for
41 papers
Fixed-mesh based approach for modeling of superconducting magnetic bearings
Elias Paakkunainen, Bárbara Maria Oliveira Santos, Gabriel dos Santos +3
Numerical simulations of superconducting magnetic bearings (SMBs) are complicated by the relative motion between high temperature superconductors and the magnetic guideway, which c…
A Reduced Magnetic Vector Potential Approach with Higher-Order Splines
Merle Backmeyer, Laura A. M. D'Angelo, Brahim Ramdane +1
This work presents a high-order isogeometric formulation for magnetoquasistatic eddy-current problems based on a decomposition into Biot-Savart-driven source fields and finite-elem…
Gradient-Informed Machine Learning in Electromagnetics
Matteo Zorzetto, Merle Backmeyer, Michael Wiesheu +3
Simulation techniques such as the finite element method are essential for designing electrical devices, but their computational cost can be prohibitive for repeated or real-time co…
Electro-thermal topology optimization of an electric machine by the topological derivative considering drive cycles
Nepomuk Krenn, Théodore Cherrière, Sebastian Schöps +1
We consider a 2d permanent magnet synchronous machine operating in a sequence of static operating points coming from a drive cycle. We aim to find a rotor design which maximizes th…
Magnetic Field Conforming Formulations for Foil Windings
Louis Denis, Elias Paakkunainen, Paavo Rasilo +3
We extend the foil winding homogenization method to magnetic field conforming formulations. We first propose a full magnetic field foil winding formulation by analogy with magnetic…
Transient Finite Element Simulation of Accelerator Magnets Using Thermal Thin Shell Approximation
Erik Schnaubelt, Andrea Vitrano, Mariusz Wozniak +3
Thermal transient responses of superconducting magnets can be simulated using the finite element (FE) method. Some accelerator magnets use cables whose electric insulation is signi…
Isogeometric Analysis for 2D Magnetostatic Computations with Multi-level Bézier Extraction for Local Refinement
Andreas Grendas, Michael Wiesheu, Sebastian Schöps +1
Local refinement is vital for efficient numerical simulations. In the context of Isogeometric Analysis (IGA), hierarchical B-splines have gained prominence. The work applies the me…
A probabilistic reduced-order modeling framework for patient-specific cardio-mechanical analysis
Robin Willems, Peter Förster, Sebastian Schöps +2
Cardio-mechanical models can be used to support clinical decision-making. Unfortunately, the substantial computational effort involved in many cardiac models hinders their applicat…
Numerical Eigenvalue Optimization by Shape-Variations for Maxwell's Eigenvalue Problem
Christine Herter, Sebastian Schöps, Winnifried Wollner
In this paper we consider the free-form optimization of eigenvalues in electromagnetic systems by means of shape-variations with respect to small deformations. The objective is to…
Tree-Cotree-Based Tearing and Interconnecting for 3D Magnetostatics: A Dual-Primal Approach
Mario Mally, Bernard Kapidani, Melina Merkel +2
The simulation of electromagnetic devices with complex geometries and large-scale discrete systems benefits from advanced computational methods like IsoGeometric Analysis and Domai…
Spline-Based Rotor and Stator Optimization of a Permanent Magnet Synchronous Motor
Michael Wiesheu, Theodor Komann, Melina Merkel +3
This work features the optimization of a Permanent Magnet Synchronous Motor using 2D nonlinear simulations in an Isogeometric Analysis framework. The rotor and stator designs are o…
A Low-Frequency-Stable Higher-Order Isogeometric Discretization of the Augmented Electric Field Integral Equation
Maximilian Nolte, Riccardo Torchio, Sebastian Schöps +3
This contribution investigates the connection between isogeometric analysis and integral equation methods for full-wave electromagnetic problems up to the low-frequency limit. The…
An Open-Source 3D FE Quench Simulation Tool for No-Insulation HTS Pancake Coils
Sina Atalay, Erik Schnaubelt, Mariusz Wozniak +4
A new module, Pancake3D, of the open-source Finite Element Quench Simulator (FiQuS) has been developed in order to perform transient simulations of no-insulation (NI) high-temperat…
Arbitrary order spline representation of cohomology generators for isogeometric analysis of eddy current problems
Bernard Kapidani, Melina Merkel, Sebastian Schöps +1
The eddy current problem has many relevant practical applications in science, ranging from non-destructive testing to magnetic confinement of plasma in fusion reactors. It arises w…
Magneto-Thermal Thin Shell Approximation for 3D Finite Element Analysis of No-Insulation Coils
Erik Schnaubelt, Sina Atalay, Mariusz Wozniak +6
For finite element (FE) analysis of no-insulation (NI) high-temperature superconducting (HTS) pancake coils, the high aspect ratio of the turn-to-turn contact layer (T2TCL) leads t…
Reduced Basis Approximation for Maxwell's Eigenvalue Problem and Parameter-Dependent Domains
Max Kappesser, Anna Ziegler, Sebastian Schöps
In many high-frequency simulation workflows, eigenvalue tracking along a parameter variation is necessary. This can become computationally prohibitive when repeated time-consuming…
Deep learning based Meta-modeling for Multi-objective Technology Optimization of Electrical Machines
Vivek Parekh, Dominik Flore, Sebastian Schöps
Optimization of rotating electrical machines is both time- and computationally expensive. Because of the different parametrization, design optimization is commonly executed separat…
Data-Driven Update of B(H) Curves of Iron Yokes in Normal Conducting Accelerator Magnets
Luisa Fleig, Melvin Liebsch, Stephan Russenschuck +1
Constitutive equations are used in electromagnetic field simulations to model a material response to applied fields or forces. The characteristic of iron laminations depends…
Combination of Measurement Data and Domain Knowledge for Simulation of Halbach Arrays with Bayesian Inference
Luisa Fleig, Melvin Liebsch, Stephan Russenschuck +1
Accelerator magnets made from blocks of permanent magnets in a zero-clearance configuration are known as Halbach arrays. The objective of this work is the fusion of knowledge from…
A Stabilized Circuit-Consistent Foil Conductor Model
Elias Paakkunainen, Jonas Bundschuh, Idoia Cortes Garcia +2
The magnetoquasistatic simulation of large power converters, in particular transformers, requires efficient models for their foils windings by means of homogenization techniques. I…
Low-Frequency Stabilization of Dielectric Simulation Problems with Conductors and Insulators
Devin Balian, Melina Merkel, Jörg Ostrowski +2
When simulating resistive-capacitive circuits or electroquasistatic problems where conductors and insulators coexist, one observes that large time steps or low frequencies lead to…
On the computation of analytic sensitivities of eigenpairs in isogeometric analysis
Anna Ziegler, Melina Merkel, Peter Gangl +1
The eigenmodes of resonating structures, e.g., electromagnetic cavities, are sensitive to deformations of their shape. In order to compute the sensitivities of the eigenpair with r…
How to Build the Optimal Magnet Assembly for Magnetocaloric Cooling: Structural Optimization with Isogeometric Analysis
Michael Wiesheu, Melina Merkel, Tim Sittig +5
In the search for more efficient and less environmentally harmful cooling technologies, the field of magnetocalorics is considered a promising alternative. To generate cooling span…
A Spline-based Partial Element Equivalent Circuit Method for Electrostatics
Riccardo Torchio, Maximilian Nolte, Sebastian Schöps +1
This contribution investigates the connection between Isogeometric Analysis (IgA) and the Partial Element Equivalent Circuit (PEEC) method for electrostatic problems. We demonstrat…