COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 26 Issue 4

Complementarity bilateral bounds on forces in magnet systems

Alain Bossavit

It is well known that complementarity can provide bilateral bounds on energy, in numerical approximations of nonlinear magnetostatics. Questions whether like force is, up to sign…

Dynamics of an electromagnetic linear actuator operating in error actuated control system

Lech Nowak, Kazimierz Radziuk

The paper seeks to present an algorithm for a dynamical field‐circuit coupled simulation of an electromagnetic linear actuator operating in automated control systems.

FE analysis of induction motor working in cryogenic temperature

Jerzy Kołowrotkiewicz, Mariusz Barański, Wojciech Szelęg, Lech Długiewicz

The paper aims to elaborate the method and algorithm of analysis of induction motor working in cryogenic temperature.

Magnetic design considerations to improve nonlinear characteristics of inductively coupled power transfer systems

D. Kacprzak, J.K. Sykulski

This study seeks to apply finite element analysis to study the proximity effect in a multi‐pickup inductively coupled power transfer system, quantify the effect and propose…

Sub‐domain finite element method for efficiently considering strong skin and proximity effects

Patrick Dular, Ruth V. Sabariego, Johan Gyselinck, Laurent Krähenbühl

This paper seeks to develop a sub‐domain perturbation technique to efficiently calculate strong skin and proximity effects in conductors within frequency and time domain finite…

Eddy current influence on electromagnetic emissions of laminated cores

Stéphane Duchesne, Ewa Napieralska‐Juszczak, Daniel Roger

A new model able to describe the high frequency (HF) behaviour of the laminated cores of AC machines is proposed. The aim is to compute the external flux density of machine cores…

Design and study of a linear actuator using an analytical approach and the 3D FEM

G. Krebs, A. Tounzi, F. Piriou, B. Pauwels, D. Willemot

Electromagnetic actuators, with very specific features for industrial processes, are needed much more for an increase in reliability and dynamic. To reach the wanted features, the…

Reduction of force exciting influences to decrease radiation of acoustic noise in synchronous machines

Stephan Schulte, Kay Hameyer

The paper aims to provide an approach to actively decrease the radiation of acoustic noise in synchronous machines.

FE analysis of electromagnetic field coupled with fluid dynamics in an MR clutch

Cezary Jędryczka

The aim of this paper is to find an accurate model for the finite element analysis of coupled phenomena in the dynamic operation of a magnetorheological clutch (MR CLUTCH).

Analysis of a rotational single sheet tester using 3D finite element model taking into account hysteresis effect

Jean V. Leite, Abdelkader Benabou, P.A. da Silva, N. Sadowski, Thomas Henneron, Stéphane Clénet, P. Kuo‐Peng, Francis Piriou, N.J. Batistela

The magnetic field strength measurement in a rotational single sheet tester (RSST) is quite difficult to achieve. In fact, flux leakage perturbs the field sensors as well as the…

Comparison of different iron core models of three‐phase core‐type transformers

Matjaž Dolinar, Drago Dolinar, Gorazd Štumberger, Boštjan Polajžer

The majority of three‐phase dynamic transformer models used in commercially available electric power system transient simulation programs offer only saturated three‐phase…

Numerical model of a thermoelastic actuator solved as a coupled contact problem

Ivo Doležel, Pavel Karban, Bohuš Ulrych, Mykhailo Pantelyat, Yuriy Matyukhin, Pavlo Gontarowskiy

The purpose of this paper is to investigate the parameters and operation characteristics of an actuator working on the principle of thermoelasticity whose structure was designed…

The calculation of the classical loss as well as the excess loss in the soft magnetic materials under the rotational magnetisation

Jan Anuszczyk, Zbigniew Gmyrek, Grzegorz Zwoliński

The calculation of the power loss in the core of the electrical machines is a special problem. In some areas of the electrical machine core the magnetic fields are neither…

Dynamical analysis for flaw shape identification in non linear eddy current tests

Matteo Cacciola, Domenico Costantino, Francesco Carlo Morabito, Mario Versaci

The paper seeks to propose a specific approach based on Dynamic Analysis and Chaos Theory aiming to emphasize the differences into the eddy current signals obtained by related…

Eddy current losses in permanent magnets of the BLDC machine

Damijan Miljavec, Bogomir Zidarič

This study aims to calculate eddy current losses in permanent magnets of BLDC machine in the generator mode of operation with no‐load.

A finite element analysis of spatial solitons in optical fibres

A. Nicolet, F. Drouart, G. Renversez, C. Geuzaine

This paper concerns the study of non‐linear effects in optical fibres with a core made of a Kerr type medium. The aim is to propose an algorithm to find spatial solitons, i.e…

Modeling the frequency response of p+InP/n−InGaAs/n+InP photodiodes with an arbitrary electric field profile

Jorge Manuel Torres Pereira

This paper seeks to present a numerical model which is used to obtain the transit time limited frequency response of p‐i‐n photodiodes with an arbitrary electric field profile…

A method for optimization of the working point of the N‐phase (N+1)‐wire systems with nonlinear loads

Krzysztof Debowski, Marian Pasko

The paper proposes to deal with the problems concerning the N‐phase (N+1)‐wire system with sinusoidal voltage sources and nonlinear loads. In the model of the N‐phase voltage…

Applications of phase‐plane analysis to thyristor modelling

Júlio Paisana, H. Abreu Santos

The aim of this study is to develop a thyristor model based on the general equations of the semiconductors.

Energy controlled shunt active power filters

Andrzej Szromba

Shunt active power filters are used to decrease or almost eliminate non‐active currents flowing through the supply source. Numerous control methods of active filters have been…

Improved MRAS‐type speed estimator for the sensorless induction motor drive

T. Orlowska‐Kowalska, M. Dybkowski

This paper aims to obtain an accurate and robust estimation method of the rotor flux and speed for the sensorless induction motor (IM) drive.

Sensorless control of PMSM drive with state and load torque estimation

Dariusz Janiszewski, Roman Muszyński

The purpose of this paper is to obtain a fully sensorless permanent magnet synchronous motor (PMSM) drive control algorithm used for robot arm drive with load recognition. The…

Application of neuro‐fuzzy techniques to robust speed control of PMSM

Tomasz Pajchrowski, Krzysztof Zawirski, Stefan Brock

The purpose of the paper is to find a simple structure of speed controller robust against drive parameter variations. Application of neuro‐fuzzy technique in the controller of PI…

Improved direct torque and flux control of induction motor drive

Andrzej Sikorski, Marek Korzeniewski

The aim of the paper is to conduct an analytical study of a new method of induction motor torque and flux direct control with nonlinear controllers.

Preface

Andrzej Demenko