COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 41 Issue 3

Guest editorial: Preface

Oszkár Bíró, Piergiorgio Alotto, David Lowther

Enhanced beamforming techniques for cylindrical-substrate microstrip array antennas

Christos P. Exadaktylos, Dimitrios I. Karatzidis, Theodoros T. Zygiridis, Nikolaos V. Kantartzis

A class of robust and efficient beamforming methods is developed in this paper for the optimised design of realistic microstrip antennas on arbitrarily curved substrates. More…

Sensitivity analysis for automotive EMC measurements using quasistatic Darwin model

Arnold Bingler, Sándor Bilicz, Márk Csörnyei

The purpose of this paper is performing a global sensitivity analysis for automotive electromagnetic compatibility (EMC) measurements related to the CISPR 25 setup in order to…

Reduced order field-circuit modeling of squirrel cage induction machines for automotive applications

Dániel Bíró, Franz Diwoky, Erich Schmidt

The aim of the paper is to investigate the impacts of simplifications of a reduced-order simulation model of squirrel cage induction machines (SCIMs) by numerical experiments.

Sensorless metal object detection for wireless power transfer using machine learning

Yunyi Gong, Yoshitsugu Otomo, Hajime Igarashi

This study aims to realize a sensorless metal object detection (MOD) using machine learning, to prevent the wireless power transfer (WPT) system from the risks of electric…

Bayesian inference of multi-sensors impedance cardiography for detection of aortic dissection

Vahid Badeli, Sascha Ranftl, Gian Marco Melito, Alice Reinbacher-Köstinger, Wolfgang Von Der Linden, Katrin Ellermann, Oszkar Biro

This paper aims to introduce a non-invasive and convenient method to detect a life-threatening disease called aortic dissection. A Bayesian inference based on enhanced…

Steady state solution of NFC model with nonlinear load using PEEC

Samuel Kvasnicka, Thomas Bauernfeind, Paul Baumgartner, Riccardo Torchio

The purpose of this paper is to show that the computation of time-periodic signals for coupled antenna-circuit problems can be substantially accelerated by means of the single…

A mixed multiscale FEM for the eddy current problem with T,Φ-Φ and vector hysteresis

Valentin Hanser, Markus Schöbinger, Karl Hollaus

This work introduces an efficient and accurate technique to solve the eddy current problem in laminated iron cores considering vector hysteresis.

Application of model order reduction with Cauer ladder networks to industrial inductors

Niels Koester, Oliver Koenig, Alexander Thaler, Oszkár Bíró

The Cauer ladder network (CLN) model order reduction (MOR) method is applied to an industrial inductor. This paper aims to to anaylse the influence of different meshes on the CLN…

Towards real-time magnetic dosimetry simulations for inductive charging systems

Norman Haussmann, Martin Zang, Robin Mease, Markus Clemens, Benedikt Schmuelling, Matthias Bolten

Inductive charging systems for electrically powered cars produce a magneto-quasistatic field and organism in the vicinity might be exposed to that field. Magneto-quasistatic…

Topology optimization of magnetic cores for WPT using the geometry projection method

Yoshitsugu Otomo, Hajime Igarashi

The purpose of this study is to search for an optimal core shape that is robust against misalignment between the transmitting and receiving coils of the wireless power transfer…

Deep learning-based surrogate model for fast multi-material topology optimization of IPM motor

Hayaho Sato, Hajime Igarashi

This paper aims to present a deep learning–based surrogate model for fast multi-material topology optimization of an interior permanent magnet (IPM) motor. The multi-material…

Magnetic field simulations using explicit time integration with higher order schemes

Bernhard Kähne, Markus Clemens, Sebastian Schöps

A transient magneto-quasistatic vector potential formulation involving nonlinear material is spatially discretized using the finite element method of first and second polynomial…

Correlating structural complexity and acoustic noise performance of electric motors

Issah Ibrahim, Mohammad Hossain Mohammadi, Vahid Ghorbanian, David Lowther

Acoustic noise is a crucial performance index in the design of electrical machines. Due to the challenges associated with modelling a complete motor, the stator is often used to…

Domain decomposition and upscaling technique for metascreens

Michael Leumüller, Karl Hollaus, Joachim Schöberl

This paper aims to consider a multiscale electromagnetic wave problem for a housing with a ventilation grill. Using the standard finite element method to discretise the apertures…

Maximum entropy snapshot sampling for reduced basis modelling

Marcus W.F.M. Bannenberg, Fotios Kasolis, Michael Günther, Markus Clemens

The maximum entropy snapshot sampling (MESS) method aims to reduce the computational cost required for obtaining the reduced basis for the purpose of model reduction. Hence, it…

Model order reduction of nonlinear eddy-current field using parameterized CLN

Miwa Tobita, Hamed Eskandari, Tetsuji Matsuo

The authors derive a nonlinear MOR based on the Cauer ladder network (CLN) representation, which serves as an application of the parameterized MOR. Two parametrized CLN…

Computation of rotational hysteresis losses by vector Preisach models based on rotational operators

Michael Nierla, Manfred Kaltenbacher, Stefan Johann Rupitsch

A major purpose of vector hysteresis models lies in the prediction of power losses under rotating magnetic fields. The well-known vector Preisach model by Mayergoyz has been shown…

Investigation of electromagnetic wave propagation in the bicomplex 3D-FEM using a wavenumber Whitney Hodge operator

Thomas Reum, Hannes Toepfer

The purpose of this paper is to show the applicability of a discrete Hodge operator in the context of the De Rham cohomology to bicomplex-valued electromagnetic wave propagation…

Fast and numerically stable Mie solution of EM near field and absorption for stratified spheres

Olivér Csernyava, Bálint Péter Horváth, Zsolt Badics, Sándor Bilicz

The purpose of this paper is the development of an analytic computational model for electromagnetic (EM) wave scattering from spherical objects. The main application field is the…

Finite-difference wave-propagation models for dispersive media: impact of space-time discretization

Theodoros Zygiridis, Nikolaos Kantartzis

The computational accuracy and performance of finite-difference time-domain (FDTD) methods are affected by the implementation of approximating derivative formulae in diverse ways…

Measurement and modeling of effective cable parameters of unshielded conductors

Karl Hollaus, Susanne Bauer, Michael Leumüller, Christian Türk

Cables are ubiquitous in electronic-based systems. Electromagnetic emission of cables and crosstalk between wires is an important issue in electromagnetic compatibility and is to…