## Nonlinear Electromagnetic Systems: Proceedings of the International ISEM Symposium on Nonlinear Electromagnetic Systems, Cardiff, Wales, UK, 17-20 September, 1995The book covers classical and practical approaches to electromagnetic field solutions in magnetic devices. The following topics are addressed: Advanced computional techniques; Intelligent computer aided design; Magnetic materials; Inverse problems; Magnetic sensors and transducers; Performance and optimisation of devices; Applications to electronic systems; Modelling of non-linear systems and other related topics. This volume presents 200 of the best articles presented at the International Symposium on Non-Linear Electromagnetic Systems (ISEM in Cardiff, Wales). The previous ISEM papers were published in the successful volume Advanced Computational and Design Techniques in Applied Electromagnetic Systems (by Elsevier).Main chapters in this book are: Electromagnetic Devices: Non-linearities at contacts and interfaces in semiconductor structures by R.H. Williams as key-note. Optimisation, Inverse and Biological Studies: Power loss testing; intelligent computation of optimization of metal cutting; grid methods for CFD and CEM. Magnetic Materials: Materials for circuit semilator applications; rotational magnetostriction. Computational Techniques and Modelling: Electromagnetic device design; soft magnetic materials; engineering application of artificial intelligence. Sensors and Non-destructive Testing: Eddy current nondestructive evaluation; nonlinear magnetoresistance; micro magnetic sensor. Electronic and Electrical Applications: Non-linear transistor parameters; superconducting magnets. |

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### Contents

Aspects of magnetic levitation by bulk highT superconductor based on dynamical | 4 |

Dynamic response of a magnet levitated above an excited highTc superconductor | 11 |

Torque estimation for switched reluctance motors by an online procedure | 19 |

Flux distribution in 5 limbs transformer of 160WA R Rygal S Sieradzki | 27 |

The basic characteristics of the vertical linear synchronous motor for a ropeless | 35 |

Finite element analysis of a threephase induction motor taking into account the sec | 43 |

Increase of energetical performances of a threephase frequency ferromagnetic tripler | 51 |

Control of a square armature DC linear motor with electronic commutation | 59 |

Nonlinear dependencies between grain orientation and anisotropy of magnetic prop | 446 |

Magnetic bistability in amorphous glasscovered wires H Chiriac G Pop | 462 |

Magnetoelastic properties of shape memory compound Ni2MnGa A N Vasilev | 476 |

Image processing applications in measurements of features in SEM magnetic domain | 491 |

Knowledge based approaches to electromagnetic device design D A Lowther | 501 |

Calculation of electrohydrodynamic flow in a circular cylindrical conduit | 520 |

Application of wavelet analysis in eddy current problems with current vector poten | 536 |

Numerical simulation of transient scattering phenomena using Dirichlet gauge BEM | 552 |

Investigation of a 3phase woundcore amorphous transformer A Basak A J Moses | 67 |

FEM analysis of magnetic field of two linear oscillating ferroresonant motors | 76 |

Finite element prediction of flux pulsations in induction machines A Canova | 80 |

Electromagnetic field and circuital analysis of nonlinear transformers via an equiva | 96 |

Input and output characteristics of induction motors using finite element analysis | 112 |

Parallel linear solver under PVM for electric machine design H J Kim H S Kim | 128 |

Application of high T superconductor to passive control of plasma position | 144 |

Simulation and experiment on vibration control of a cantilever beam levitated by high | 158 |

Intelligent computation for the optimisation of metal cutting and forming R Teti | 173 |

A method for improving the quality of sound waveform using analysissynthesis sys | 186 |

Optimal design of stator of closed slot type permanent magnet motors for cogging | 190 |

Inverse analysis by boundary element method with Laplace transform M Enokizono | 206 |

Reduction of magnetic field distortion in loudspeaker drivers with long throw coils | 222 |

Mesh generation for numerical methods for automatic optimization purposes | 238 |

An efficient algorithm of the 3D inverse problem L Gong K Zhang | 254 |

Electrical impedance tomography based on higher order finite element approximation | 270 |

Calculation of cage induction motor parameters using artificial neural network based | 286 |

Efficient distribution of quantized loads over a tree network of processors for elliptic | 290 |

Identification of circular holes in thin plates using a neural network approach | 298 |

Estimation of traveling source in the human brain associated with auditory evoked | 306 |

Effects of magnetic fields on diffusion of fibrinogen molecules M Iwasaka | 313 |

Effects of magnetic fields on the behavior of dissolved oxygen in aqueous solution | 322 |

Spatiotemporal simulation of MEG activities generated by spreading multiple | 330 |

Source modeling of extremely slow components of MEG activities during memory | 338 |

A model of nerve excitation elicited by a train of pulsed magnetic stimulation | 346 |

Magnetic orientation of red blood cells with or without plasma proteins T Suda | 355 |

Modeling the magnetic properties of materials for circuit simulator applications | 365 |

Fundamental aspects of rotational magnetostriction H Pftitzner and A Hasenzagl | 374 |

Open problems in the Preisach modeling of magnetic hysteresis O Benda and S Barta | 380 |

The effect of heat treatment on the stressmagnetization properties of amorphous | 386 |

Effect of aggregation of particles on thermohydrodynamic characteristics of a mag | 394 |

The coupling of magnetoacoustic waves propagated in a viscous plasma of finite con | 398 |

Solitons and Bosecondensation of magnons in ferrites and planar fertile structures | 415 |

Domain observations under DC representation of rotational magnetisation | 430 |

Integrodifferential method for permanent magnet modeling in 3D space using edge | 568 |

Application of the dynamic Preisach model to the simulation of circuits containing | 584 |

The multigrid method for computation of the outerregion matching data in resistive | 600 |

Hysteresis loops of anistropic materials calculated by statistic domain behaviour | 614 |

Advances in transient eddy current nondestructive evaluation JR Bowler | 623 |

New sensitive and quickresponse micro magnetic sensor using magnetoimpedance | 634 |

Static and utility frequency magnetic shielding using highTc YBCO bulk supercon | 640 |

Magnetic shielding effects of highTc superconducting plates application of low | 648 |

Magnetic field of thin film heads using a SchwarzChristoffel transformation | 656 |

Design problems of magnetoelastic force transducers J Zakrzewski | 664 |

Time delay of acoustic waves caused by a crack in a piezoelectric strip D Gafka | 674 |

On the use of magnetostrictive amorphous wires in force sensors H Chiriac | 680 |

Magnetooptical displacement sensor M Gaugitsch H Hauser F Haberl | 688 |

Transducer with orthogonal coils used to control flat products A Savin E Radu | 696 |

Finite element modelling and design of capacitive angular displacement sensors | 704 |

Special solutions of StonerWohlfarth equation and their applications for magneto | 712 |

Magnetic property assessment as basis for nondestructive evaluation for steel compo | 720 |

A signal processing method for eddy current testing of steam generator tubing | 728 |

An application of 1+6 evolution strategy to eddy current NDT of axisymmetric | 744 |

Influence of noise to cracks in glass plates A Tanaka and A ho | 760 |

The measurement of shock wave energy by means of a magnetoelastic sensor | 776 |

A virtual instrumentation based magnetics test system J J Dalton J Liu A J Moses | 792 |

Investigations with three coordinate v s magnetometer A N Bazhan | 808 |

Optimization of brushless DC motors with q axis flux barriers J F Eastham | 821 |

Computation of generation and impact of electromagnetic fields on ferromagnetic | 835 |

On the finite element analysis of high frequency induction heating systems fed by vol | 851 |

Magnetoelastic buckling of tworod system H Yabuno Y Kurata and N Aoshima | 867 |

Coupled fields produced by moving structural defects in dielectrics J P Nowacki | 885 |

Vibration control of overhung rotor by magnetic bearing system H Sakurai J Tani | 898 |

Novel depolarization properties of multi layered nonreciprocal chiral slab A Kusunoki | 917 |

Twodimensional pn junction analysis using the finiteelement method V Maid | 930 |

Analysis of PEL radiation field structure by electron in ponderomotive potential | 938 |

Consideration of eddy current distribution in vibration element using giant magneto | 954 |

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Abstract algorithm amorphous amplitude analysis angle anisotropy applied Basak Eds boundary conditions calculated characteristics circuit coefficients coil components computation conductivity conductor constant core crack current density curve detection device dipole direction displacement distribution domain wall dynamic eddy current effect electric field electrode electromagnetic equation excitation experimental ferrite ferromagnetic Figure finite element analysis finite element method force frequency function HTSC hysteresis loop IEEE IEEE Trans impedance induction IOS Press iteration levitation linear linear motor loss Magn magnetic field magnetic flux density magnetic materials magnetic vector potential magnetisation magnetostriction measured mechanical Moses motor neural network nonlinear numerical obtained optimization output paper parameters permanent magnet permeability plasma plate problem region rotating rotor sample saturation scalar potential sensor shown in Fig shows signal simulation solution stator steel structure superconductor surface technique temperature torque transducer transformer vector potential vibration voltage waveform wire