COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 32 Issue 5

Large scale energy storage with redox flow batteries

Piergiorgio Alotto, Massimo Guarnieri, Federico Moro, Andrea Stella

The purpose of this paper is to show the main features of the redox flow battery technology, present the current state-of-the-art of both industrial and research systems and to…

Multi-domain multi-scale problems in high frequency finite element methods

Istvan Bardi, Kezhong Zhao, Rickard Petersson, John Silvestro, Nancy Lambert

– This paper aims to present a domain decomposition method to overcome the challenges posed by multi-domain, multi-scale high frequency problems.

Magnetomechanical coupled FE simulations of rotating electrical machines

Anouar Belahcen, Katarzyna Fonteyn, Reijo Kouhia, Paavo Rasilo, Antero Arkkio

– The purpose is to implement and compare different approaches for modelling the magnetostriction phenomenon in iron sheet used in rotating electrical machines.

Neural network approach to sizing an electrical machine

Steven Bielby, David A. Lowther

The conventional starting point for the design of an electrical machine (or any low-frequency electromagnetic device) is known as “sizing”. In this process, a simple magnetic…

Calculation of eddy-current probe signal for a 3D defect using global series expansion

Sandor Bilicz, Jozsef Pavo, Szabolcs Gyimothy

The purpose of this paper is to present a novel eddy-current modeling technique of volumetric defects embedded in conducting plates. This problem is of great interest in…

A novel parametric model order reduction approach with applications to geometrically parameterized microwave devices

Stefan Burgard, Ortwin Farle, Romanus Dyczij-Edlinger

The goal is to derive a numerical method for computing parametric reduced-order models (PROMs) from finite-element (FE) models of microwave structures that feature geometrical…

Computation of end-winding inductances of rotating electrical machinery through three-dimensional magnetostatic integral FEM formulation

Flavio Calvano, Giorgio Dal Mut, Fabrizio Ferraioli, Alessandro Formisano, Fabrizio Marignetti, Raffaele Martone, Guglielmo Rubinacci, Antonello Tamburrino, Salvatore Ventre

– The paper aims to illustrate a numerical technique to calculate fields and inductances of rotating electrical machines.

Evaluating the influence of manufacturing tolerances in permanent magnet synchronous machines

Isabel Coenen, Thomas Herold, Christelle Piantsop Mbo'o, Kay Hameyer

Manufacturing tolerances can result in an unwanted behavior of electrical machines. A quality control of machines subsequent to manufacturing is therefore required in order to…

Simulation of the absorbing clamp method for optimizing the shielding of power cables

Szabolcs Gyimóthy, József Pávó, Péter Kis, Tomoaki Toratani, Ryuichi Katsumi, Gábor Varga

The purpose of this paper is to propose an efficient numerical simulation tool based on FEM, by which the EMC shielding effect characteristics of power cables can be predicted in…

Accurate magnetostatic simulation of step-lap joints in transformer cores using anisotropic higher order FEM

Andreas Hauck, Michael Ertl, Joachim Schöberl, Manfred Kaltenbacher

The purpose of this paper is to propose a solution strategy for both accurate and efficient simulation of nonlinear magnetostatic problems in thin structures using higher order…

Nanoparticle device for biomedical and optoelectronics applications

Renato Iovine, Luigi La Spada, Lucio Vegni

– In this contribution, the aim is to present a nanoparticle device, operating in the visible regime based on the localized surface plasmon resonance (LSPR) phenomenon.

Eddy current analysis of a PWM controlled induction machine

Hai Van Jorks, Erion Gjonaj, Thomas Weiland

The purpose of this paper is to propose a transmission line model for induction machines, which serves to compute the common mode input impedance in the frequency range…

Anisotropic model for the numerical computation of magnetostriction in grain-oriented electrical steel sheets

Manfred Kaltenbacher, Adrian Volk, Michael Ertl

The modeling of magnetostrictive effects is a topic of intensive research. The authors' goal is the precise modeling and numerical simulation of the magnetic field and resulting…

Efficient modeling of coil filament losses in 2D

Leena Lehti, Janne Keränen, Saku Suuriniemi, Timo Tarhasaari, Lauri Kettunen

The authors aim to search for a practical and accurate way to get good loss estimates for coil filaments in electrical machines, for example transformers. At the moment including…

Numerical and experimental investigation of the structural characteristics of stator core stacks

Mathias Mair, Bernhard Weilharter, Siegfried Rainer, Katrin Ellermann, Oszkár Bíró

The purpose of this paper is to analyse the eigenforms and eigenfrequencies of stator core stack by experimental and numerical investigation. The influence of material parameters…

Parameter identification of a finite element based model of wound rotor induction machines

Martin Mohr, Oszkár Bíró, Andrej Stermecki, Franz Diwoky

– The aim of the paper is to explain and clarify the pre-processing for a finite element based wound rotor induction machine model.

Stochastic Jiles-Atherton model accounting for soft magnetic material variability

Rindra Ramarotafika, Abdelkader Benabou, Stéphane Clénet

Classically the magnetic material models are considered with a deterministic approach. Nevertheless, when submitted to the fabrication process, the magnetic core properties are…

Investigation of the electroporation effect in a single cell

Jaime A. Ramirez, William P.D. Figueiredo, Joao Francisco C. Vale, Isabela D. Metzker, Rafael G. Santos, Matheus S. Mattos, Elizabeth R.S. Camargos, David A. Lowther

– This paper aims to investigate the electroporation phenomenon in a single cell exposed to ultra short (μs) and high voltage (kV) electric pulses.

Validation of measurements with conjugate heat transfer models

Maximilian Schrittwieser, Oszkár Bíró, Ernst Farnleitner, Gebhard Kastner

The purpose of this work is to propose a numerical method based on computational fluid dynamics (CFD) for reconstructing the heat transfer inside electrical machines. The used…

Efficient finite-element computation of far-fields of phased arrays by order reduction

Alexander Sommer, Ortwin Farle, Romanus Dyczij-Edlinger

The article aims to present an efficient numerical method for computing the far-fields of phased antenna arrays over broad frequency bands as well as wide ranges of steering and…

Model order reduction via proper orthogonal decomposition for a lithium-ion cell

Bettina Suhr, Jelena Rubeša

The simulation of lithium-ion batteries is a challenging research topic. Since there are many electrochemical processes involved in charging and discharging, models which aim to…

Speed-up of nonlinear magnetic field analysis using a modified fixed-point method

Norio Takahashi, Kousuke Shimomura, Daisuke Miyagi, Hiroyuki Kaimori

– The purpose of this paper is to propose the speed-up of the fixed-point method by updating the reluctivity at each iteration (this is called a modified fixed-point method).

The reduced basis method applied to transport equations of a lithium-ion battery

Stefan Volkwein, Andrea Wesche

– In this paper, the authors aim to show how to apply the reduced basis method to the transport equations of a lithium-ion battery.

Preface

Oszkar Biro