ISEF799

PAVIA

INTERNATIONAL SYMPOSIUMON

ELECTROMAGNETIC FIELDSIN

ELECTRICAL ENGINEERING

September 23-25, 1999Pavia, Italy

Organized by:- Department of Electrical Engineering, University of Pavia, Italy- Institute of Electrical Machines and Transformer, Technical University of Lodz, Poland- Department of Fundamental Research in Electrotechnics, Polish Academy of Sciences, Warsaw, Poland- Cooperation with Polish Society of Applied Electromagnetism

Editors: P. Di Barba, S.Wiak

UB/TIB Hannover 89120 912 724

TABLE OF CONTENTS

THURSDAY. SEPTEMBER 23rd. 1999

OPENING

PLENARY SESSIONChairmen: Prof. A. Savini and Prof. J. Turowski

The Use of Differential Forms in Electromagnetics (Invited)P. Hammond 1

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Chairman: A. Kost

0.1.1 Most General 'Non-Local* Boundary Conditions for The Maxwell Equations in aBounded RegionA. Bossavit 9

0.1.2 A Solution to the Problem of Determining X-Points in Magnetic Induction FieldsA. Massarini, U. Reggiani, L. Sandrolini 13

0.1.3 Transient Field Circuit Coupling Based on a Topological ApproachR. Mertens, H.DeGersem, K. Hameyer 17

0.1.4 On the "Genetics" of Evanescent WavesD. Schieber, L. Schachter 21

POSTER SESSION I-Area 2

ELECTRICAL MACHINES 1Chairman: K. Pawluk

P. 1.1 Application of High-Order FEM for Analysis of Electromagnetic Fields inElectromagnetic CircuitsV. Hrabovcova, P. Rafajdus, P. Kostecky, I. Kohiit 24

P. 1.2 Calculation of Power Losses in Ultra High Speed PM Motor Using FEM SoftwareD. Makuc, K. Lenasi, M. Berlec 28

P. 1.3 A Geometrically Progressing Pole-Pitch Linear Reluctance MotorM. N. Mazouka, A. Colteu, A. Mailfert 32

P. 1.4 Non-Linear Model of Synchronous Reluctance Motor with Neural NetworksD. Miljavec, B. Benedicic 36

P. 1.5 Comparision of Different Winding Models from the Aspect of Electromagnetic ForcesK. Najdenkoski, D. Manov 41

P. 1.6 Analysis of a Two-Phase Permanent Magnet Motor with Variable ReluctanceH. Oztura, E. Akpinar 45

P. 1.7 Comparison between 2-D and 3-D Finite Element Analysis of BLDC MotorS. Wang, J. Kang, K. Park 49

Chairman: J.A. Tegopoulos

0.2.1 Analysis of Non-Linear Electrostatic Devices by a Hybrid FEM-MOM FormulationS. Barmada, A. Musolino, F. Nencioni, A. Tellini 53

0.2.2 A 3D FEM Model for EMC Analysis: Coupling of an EM Wave with a Wire Inside aCavityW.P. Carpes (jr), L. Pichon, A. Razek 57

O 2.3 Outline of Field Homogeneity in TEM-Cells Calculated with the Method ofMomentsHP. Geromiller, A. Kost 61

0.2.4 Advanced Higher-Order FDTD Concepts for The Absorption Enhancement of TheGrote-Keller Boundary Conditions in Electromagnetic Scattering Analysis Using 3-D Spherical CoordinatesN.V. Kantartzis, K.P. Prokopidis, T.D. Tsiboukis 65

0.2.5 A Conformally-Oriented FDTD Methodology for the Accurate Simulation ofArbitrarily-Angled Wedges in General Rectangular or Curvilinear WaveguideStructures and Shielded Microstrip LinesT.I. Kosmanis, N.V. Kantartzis, T.D. Tsiboukis 69

POSTERSESSION 2-Area 2ELECTRICAL MACHINES AND TRANSFORMERS

Chairman: K. Zakrzewski

P.2.1 Modeling of Induction Machine Coupled with PWM Voltage InverterM. Derrhi, C. Delmotte-Delforge, P. Brochet 73

P.2.2 Extra leakage flux in a delta-connected transformerK. Hot, Z. Valkovic 77

P.2.3 Estimation of the Electric Strength of Insulation System of an HV CombinedInstrument Transformer Using 3D AnalysisE. Lesniewska 81

P.2.4 Three-Dimensional Magnetic Field Distribution in the Single and Three-PhaseReactors with Air-GapsB. Tomczuk, K. Zakrzewski 85

P.2.5 Magnetostriction Forces in Transformer CoreP.Witgzak 89

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P.2.6 3D Space Analysis of Magnetic Field in a Brushless D.C. Torus MotorR. Wrobel, M. Lukaniszyn, E. Mendrela 93

P.2.7 Field Current Computation of Induction Motor Free Acceleration in ParametricResonance ConditionJ. Zadrozny, S. Wiak, J. Zadrozny (jr), H. Welfle 97

P.2.8 Numerical and Experimental Determination of Brushless DC MotorElectromagnetic CharacteristicsH. Zeroug, B. Boukais, H. Sahraoui 101

ORAL SESSION 3 - Area 4

COUPLED PROBLEMSChairman: J. Zadrozny

0.3.1 Simulation of a Coupled Magneto-Mechanical System Through the Sliding-MeshMortar Element MethodF. Bouillault, A. Buffa, Y. Maday, F. Rapetti 105

0.3.2 Numerical Analysis of Residual Attractive Forces of a D.C. Electromagnet Using 3-D Finite Element MethodS. Ito, Y. Kawaziri, Y. Kawase, T. Nishiyama 109

O.3.3 Thermo-Mechanical Problems in Electroheat TechnologyM. G. Pantelyat 113

0.3.4 Influence of Vibrations in HTSC-PM Bearings: Computation and ExperimentsE. Portabella, R. Palka, H. May, W.R. Canders 117

0.3.5 A Numerical Model for Magneto-Mechanical Coupled ProblemsM. Voisin, Z. Ren, F. Bouillault 121

POSTERSESSION 3 - Area I

FIELD ANALYSIS AND APPLICATIONS 1Chairman: A. Bossavit

P.3.1 The Influence of the Core Dimensions of the Induction Motor on the Power LossUnder Rotational MagnetizationJ. Anuszczyk, Z. Gmyrek 125

P.3.2 A Way of Accelerating the Design of a Meshed Grounding Grid by the Hooke-JeevesMethodG. Cannistra, A. Covitti, S. De Nisi, M. Sylos Labini 129

P.3.3 A Fuzzy Procedure Inside the Maxwell's Subareas Method for Calculating theGrounding ResistancesS. De Nisi, F. Laddomada, M. Minenna, M. Sylos Labini 133

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FRIDAY. SEPTEMBER 24"1. 1999

ORAL SESSION 4 - Area 8

INDUCTION HEATINGChairman: S. Lupi

0.4.1 The Prediction of Thermal Transients in the Induction Heating of RectangularBilletsF. Dughiero, S. Lupi, S. Ponchiroli 137

0.4.2 Alternance Method in Problems of Induction Heating Processes: Basic Principlesand Experience of ApplicationsE. Ya. Rapoport, Yu. E. Pleshivtseva, M. Livshits 141

0.4.3 Thermal Deformation of the Strip During Transverse Flux Induction HeatingA. Ruhnke, A. Muhlbauer, A. Nikanorov, V. Demidovitch 525

0.4.4 Electrical Efficiency of Flat and Cylindrical Multilayer Inductors for InductionHeatingC. Sajdak, K. Kurek, R. Przyhicki 145

0.4.5 Indirect Induction Heating of Liquid Metals in Metal TanksC. Sajdak, K. Kurek, R. Przyhicki 149

0.4.6 Assembly and Disassembly of Pressed Joints by Means of Induction HeatingM. Skopek, B. Ulrych, I. Dolezel 153

0.4.7 Temperature Evaluation of Moving Sheets in Transverse Flux HeatingT. Tudorache, V. Fireteanu, M. Popa 157

POSTER SESSION 4 - Area 2ELECTRICAL MACHINES 2

Chairman: A. Razek

P.4.1 Modelling of Magnetic Field Distribution in a Four-Speed Induction MotorM. Dems, K. Kom^za, E. Lesniewska, S. Wiak 161

P.4.2 Method of Determining Input Parameters for Basic Equations of SynchronousReluctance MachineI. Dolezel, M. Chomat, L. Schreier 165

P.4.3 Frequency Domain Finite Element Approximations for Saturable ElectricalMachines Under Harmonic Driving ConditionsJ. Driesen, K. Hameyer 169

P.4.4 Calculation of Skewed Squirrel Cage Induction Motors Taking Interbar Currentsinto Account0. Drubel, L. Golebiowski 173

P.4.5 Determination of Severity and Location of Induction Motor Rotor Cage Faults withFinite Element MethodR. Fiser, S. Ferkolj 177

P.4.6 Influence of Secondary Segment Shape of Linear Reluctance Motors on ForcesA. Hamler, M. Trlep, B. Hribemik 181

P.4.7 Determination of Dynamical Phenomena in Soft-Started Induction-Motor-DrivesUsing the Finite-Difference-Time-Stepping-MethodM. Klocke 185

P.4.8 Analysis of the Influence of the Assumption of Equivalent Saturation on StartingCurrents in Induction Motors •K.Komeza, M.Dems, S.Wiak 191

P.4.9 An Extended Model for the Saturated Synchronous Machine with DamperWindingsS. Lasquellec, M.F. Benkhoris, M. Feliachi 195

P.4.10 An Influence of Magnetic Circuit Saturation on Winding Inductances of a CapacitorInduction MotorK. Makowski ...199

P.4.11 Prediction of Permanent Magnet Synchronous Motor Characteristics Using FiniteElementsB. Stumberger, B. Hribernik 204

P.4.12 Method of Calculation of Unit Power Losses and Unit Reactive Power in MagneticLaminations in a Wide Range Change of Induction and FrequencyK. Zakrzewski 208

. J * - . ORAL SESSION $-ELECTRICAL MACHINES

Chairman: E. Andresen

0.5.1 Field Simulation of Winding Forces in a Transformer for Electric ARC FurnaceP. Di Barba, M. Farina, U. Piovan, A.Savini 212

0.5.2 Optimal Turn-on and Turn-off Angle Calculation of a High-Speed Two-PhaseSwitched Reluctance MotorB. Benedi&e, D. Miljavec 216

0.5.3 Bus-Bars Analysis by a Circuital ApproachA. Geri, A. Salvini 220

0.5.4 Improved Analytical Evaluation of Air-Gap Fluxes and Forces of FerromagneticSmoothed and Toothed Structures and Pole ShoesA. Di Gerlando, G.M. Foglia 224

0.5.5 Motional Magnetic Finite Element Method Applied to High Speed Rotating DevicesH. De Gersem, H. Vande Sande, K. Hameyer 228

0.5.6 Optimising Short Circuit Forces in TransformersK. Lenasi, M. Berlec, D. Makuc 232

0.5.7 Design and Operation Simulation of Permanent Magnet Generator Wind TurbineG.J. Tsekouras, A.G. Kladas, J.A. Tegopolous 236

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FIELD ANAL¥SIS A W APPLICATIONS 2Chairman: T. Tsiboukis

P.5.1 Finite Element Computation of Axisymmetric Eddy Currents in an Infinite DomainG. Aiello, S. Alfonzetti 240

P.5.2 Numerical Implementation of the RBCI Method for Electromagnetic ScatteringS. Alfonzetti, B. Azzerboni, G. Borzi 244

P.5.3 Analysis of 2-D Configurations with High Permeability Cores and PermanentMagnets by a Surface-Currents MethodM. Andriollo, G. Martinelli, A. Morini, A. Tortella, S. Vantini 248

P.5.4 The Investigation of an Influence of The Displacement Currents on theElectromagnetic Field Distribution at a Metallic Body SurfaceS. Apanasewicz 253

P.5.5 The Perfection of The Boundary Condition of Impedance TypeS. Apanasewicz, S. Pawlowski 257

P.5.6 Solving 3D Testing Model IEEJ with Substitutive Current MethodM. Berlec, K. Lenasi, D. Makuc 261

P.5.7 A New Design Technique for Non-Homogeneous Media FiltersF. Bilotti, A. Toscano, L. Vegni 265

P.5.8 Two Formulas for 2-D PermeancesG.A. Cividjian, N.G. Cividjian, A.G. Cividjian 269

P.5.9 The Field Distribution and Power Losses in the Steel Sheet Under Cooexistence ofTwo Fluxes with Different FrequenciesZ. Gmyrek, G. Zwolmski 273

P.5.10 Linear Algebra Package LAPACK-To Trust or not To TrustM. M. Stabrowski 277

P.5.11 Application of the Local Net Method in Electromagnetic Field Computations withFinite Difference AlgorithmA.Turkot 281

P.5.12 Quadrosection Method of Equivalent Magnetic Circuit ComputationM. V. Zagimyak, V. Usatyuk, S. A. Nasar 285

Chairman: S. Wiak

0.6.1 Vector Shape Optimization of an Electrostatic Micromotor Using a GeneticAlgorithmP. Di Barba, M. Farina, A. Savini 289

0.6.2 Electromagnetic Vibrators Optimal Design (EMV)S. Darie, I. Vadan, D. H. Kang, P. Curiac, K. Chang 293

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0.6.3 Numerical Method in Low Voltage Fuses DesignK. Hot, J. Micic 297

0.6.4 Dynamic Analysis of Oil Dashpot for Electromagnetic Release in Low VoltageCircuit Breakers Using Finite Element MethodY. Kawase, T. Ota, M. Yoshida, S. Ito 301

0.6.5 Heat and Dissipate Processes in Superconductive Windings of Linear SynchronousMotorsK.K. Kim, A.V. Gamayunov 305

0.6.6 Modelling of the Computer Hardware DrivesL. Klug 309

0.6.7 Analysis and Development of a Novel Planar ActuatorA. A. Susin, A. F. Flores-Filho, M. A. Da Silveira 313

0.6.8 Analysis and Design Optimization of an Asymmetric Actuator of Optical Disk DriveS. Wang, J. Kang, J. Seo, K. Park 317

0.6.9 Force Profile Optimization of an Electromagnetic Device Fed by a Voltage SupplyF. Zaoui, C. Marchand, A. Razek 321

Chairman: Y. Ishihara

P.6.1 Design of a Two-Axes Active Electromagnetic Sidestick Actuating SystemS. Barmada, A. Musolino, F. Nencioni, R. Rizzo, A. Tellini 325

P. 6.2 Analysis of Dynamic Behaviour of a DC Electromagnetic Relay by 3D FiniteElement MethodA. Canova, G. Gruosso, M. Ottella 329

P.6.3 Numerical Modelling of Propulsion System Applied to Conveyors DrivingC. Cirstea, G. Ciumbuela, R. Vives Fos 333

P.6.4 Modeling and Optimization of Thick Film Solenoid-Bar Type Inductors andTransformersV. D. Desnica, Lj. D. Zivanov, O.S. Aleksic, S.M. Jenei 337

P.6.5 Quasi-3D Modeling of a Resistance Welding Transformer to Estimate Flux DensityDistribution and Integral Magnetic Field ParametersS.Y. Guenov, P.M. Risov, S.N. Guenov 341

P.6.6 3-D Finite Element Analysis of Electrodynamic Repulsion Forces Acting on theMoving Electrode in Vacuum InterruptersS. Ito, Y.Takato,Y. Kawase 345

P.6.7 Thrust Analysis of Interior Permanent Magnet Motors by 3-D Finite ElementMethodY. Kawase, H. Fukunaga 349

P.6.8 Shielding of High Voltage Bus-barsP. Kis, T. Barbarics 353

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P.6.9 Finite Element Electric and Magnetic Field Analysis of Microstrip and Planar StripPCB'sC.F.R Lemos Antunes 357

P.6.10 Topological Consideration of Magnetic Current Limiter Based on PassiveComponentsS.C. Mukhopadhyay, M. Iwahara, S. Yamada 361

P.6.11 The Working State of Cone-Shaped Permanent Magnets Determined by Boundary-Integral ApproachK. Pawluk, Z. Zycki : 365

P.6.12 Determination of Optimal Parameters of Micromachined Inductive SensorLj.D. 2ivanov, G.M. Stojanovic, A. Vujanic, S.M. Jenei 369

Chairman: P. Di Barba

0.7.1 Stochastic Optimization of an Induction Heating System by Means of DBCIS. Alfonzetti, E. Dilettoso, F. Dughiero, N. Salerno 373

0.7.2 Optimisation of Edge Effects in Induction Heating ApplicationsM. Battistetti, F. Dughiero, S. Lupi 377

0.7.3 Shape Optimization of a BDC Wheel Motor Using a Finite Element Model andPowell's Conjugated Directions MethodS. Brisset, P. Brochet 381

0.7.4 Genetic Algorithm Approach in Design Optimisation of a Permanent Magnet AxialField MotorG. Cvetkovski, L. Petkovska, M. Cundev, S. Gair 385

0.7.5 The Algorithm for Recognition of Subsurface CracksK.M. Gawrylczyk 389

0.7.6 Optimal Design of Axis Symmetric Linear Oscillatory Actuator Using GeneticAlgorithmY. Hasegawa, K. Harada, Y. Ishihara, T. Todaka, K. Hirata 393

0.7.7 Optimal Design Methodologies with Application to Small Commutator MotorsP. Puternicki, M. Rudnicki 397

0.7.8 Vector Optimization of a High-Speed Drive using Two-Dimensional Numerical FieldCalculationC. Schatzer, A. Binder, W. Mixller 401

0.7.9 FAT-Shape Optimization Software for ElectromagneticsJ. Starzynski, S. Wincenciak, J. Korytkowski 405

0.7.10 A System for Interactive Design and Optimisation of Brushless PM MotorsJ.K. Sykulski, A.H. Al-Khoury 409

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0.7.11 Determination of Optimum Design Criteria of Coreless-Linear Brushless D.C.MachineO. Ustun, R. N. Tuncay 413

S A T U R D A Y . S E P T E M B E R 2 5 . 1 9 9 9

. ^ > I .t - ' . * FIELD ANALYSIS 3 , 0 ;Chairman: J. Sykulski

0.8.1 Comparison Between Transient and Quasi-Stationary Calculations of Eddy CurrentField Problems with Moving ConductorsD. Albertz, G. Arians, G. Henneberger 417

0.8.2 Coaxial Conductor Line Open End CapacitancesS. Alfonzetti, E. Costamagna, A. Fanni 421

0.8.3 A Combined Advancing-Front / Delaunay Technique for the Meshing of CurvedSurfaces in 3DP. Alotto, P. Molfino, G. Molinari 425

0.8.4 The Iterative Procedure for 3D Eddy Current Transient ProblemL.Nowak 429

Chairman: K. Hameyer

P.8.1 Field-Circuit Integrated Methodologies for Design and Modelling of PermanentMagnet Levitation Devices for Maglev Transportation SystemsF. Castelli Dezza, A. Di Gerlando, G.M. Foglia 433

P.8.2 Dependence of a Superconductor Magnetic Filter Effectiveness on MagneticInductionA. Ciesla 437

P.8.3 F.E.M. 3-D Application for Modeling and Design of Epstein FrameM. Cundeva, L. Arsov 441

P.8.4 New Anisotropic Layered Powder Magnetic MaterialsV. Leshchinsky, M.V. Zagirnyak, B. Nevzlin, U. Abuseif. 445

P.8.5 Finite Element Aided Analysis of the Effect of Non-Uniform Magnetization on thePerformances of Repulsive Type Magnetic BearingT. Ohji, S.C. Mukhopadhyay, M. Iwahara, S. Yamada 449

P.8.6 Magnetic Properties of Ferromagnetics Taking Into Account Eddy CurrentsA. Roman, J. Szczyglowski, A. Krawczyk 453

P.8.7 A New Method Determing the Semi-Solid State of Aluminium Alloys forThixoforming: Analysis and Calculation of the Acoustic FieldR. Sebus, T. Bauer, G. Henneberger 457

P.8.8 Eddy-Current Based Determining of Conductivity and PermittivityR. Sikora, S. Gratkowski, M. Komorowski 461

P.8.9 Comparison of Electromagnetic Field Computation Using Vector and ScalarPotential for 3D Systems with Permanent MagnetsK. Wozniak 465

P.8.10 The Working State of Permanent Magnets Evaluated on The Basis of PartiallyMeasured Magnet DataZ. Zycki, K. Pawluk 469

Chairman: A. Krawczyk

0.9.1 Shielding Effects of Buildings on HV Electric Field Human ExposureG. Ala, P. Buccheri, M. L. Di Silvestre, M. Inzerillo 473

0.9.2 Far-field Potentials in Neurophysiology and their Origin: Computational AspectsA. Bramanti, P. Di Barba, A.Savini, R. Callieco, A. Romani 477

0.9.3 Neural Network Approach to Electrical Impedance TomographyE. Ratajewicz-Mikolajczak, J. Sikora 481

0.9.4 Electromagnetic Safety of an Induction Heating Power SupplyO. Sahin, H. Karaca : 485

0.9.5 Predicting the Source of Emission in an Electronic SystemO. Sahin, H. Karaca 489

0.9.6 New Methods of Imaging in Electrical Impedance Tomography: a ComparativeStudyR. Sikora, S. Filipowicz, Z. Giza, J. Sikora 493

0.9.7 A CSG Model of the Human Head for ECT SimulationJ. Starzyriski, B. Sawicki, A. Krawczyk, T. Zyss 497

0.9.8 Visualization of Current Density Distributions in Biomagnetic Inverse ProblemsM. Ziolkowski, J. Haueisen, H. Nowak, H. Brauer 501

Chairperson: A. Ivanyi

0.10.1 Additional Losses in Induction Motor Due to Higher Harmonics of Magnetic FieldM. Da>rowski 505

0.10.2 About Transition Fields-Circuit TheoryS. Leva, A.P. Morando 509

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0.10.3 One-Port Electromagnetic Concept and Slepian TheoremS. Leva, A.P. Morando 513

O.10.4 A New Program for Electromagnetism at Faculties of Electrical EngineeringR. Sikora, S. Gratkowski 517

0.10.5 Electromagnetism for MechatronicsJ. Turowski, G. Zwolihski, Z.J. Pudlowski 521

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