Amalia Ivanyi - Academia.edu (original) (raw)

Papers by Amalia Ivanyi

Periodica Polytechnica Electrical Engineering, 1994

The two-dimensional measurements prove that the magnetic hysteresis shows different behaviour at ... more The two-dimensional measurements prove that the magnetic hysteresis shows different behaviour at rotational magnetic field comparing its properties to the alternating one. In this paper these phenomena are investigated from theoretical point of view. It is proved that due to the introduced anisotropy tensor the circular polarized rotational magnetic induction yields elliptical polarization for both components of the magnetization as well as for the M-field patterns. The non-zero value of the off-diagonal elements in the anisotropy tensor has influence on the width of the hysteresis loops. It is proved that at small amplitude of the circular polarized rotational magnetic flux both the M-field and the H-field patterns have elliptical polarization. Increasing the amplitude of the induction in the rotational field, at saturation region the H-field patterns have modification in the elliptical polarization.

Handbook of Electrical Steel, 2021

Physica B: Condensed Matter, 2006

... Figures/Tables. Figures/Tables - selected. References. References - selected. Physica B: Cond... more ... Figures/Tables. Figures/Tables - selected. References. References - selected. Physica B: Condensed Matter Volume 372, Issues 1-2, 1 February 2006, Pages 45-48 Proceedings of theFifth International Symposium on Hysteresis and Micromagnetic Modeling. ...

Journal of Physics: Conference Series, 2008

In this paper a new, phenomenological, temperature dependent hysteresis model of the vaporliquid ... more In this paper a new, phenomenological, temperature dependent hysteresis model of the vaporliquid first-order phase transitions is introduced. For the modeling of the vapor-liquid phase transition a versatile ODE-based hysteresis model is implemented under the assumption of a local non-equilibrium condition that enables a certain level of supersaturation without phase change. The proposed modeling approach improves the existing equation-of-state type diffuse interface methods involved in homogeneous two phase flow models.

… of the 12th International Symposium on …, 2003

Przegląd Elektrotechniczny, 2013

In this paper the dynamic behaviour of a completely rigid steel column with a mass on the top, lo... more In this paper the dynamic behaviour of a completely rigid steel column with a mass on the top, loaded by exponentially increasing cycling force is investigated. The joint at the fixed end of the column is modelled with a semi-rigid rotational spring; its non-linear characteristic is theoretically represented by a Preisach hysteresis model. In the solution of the non-linear dynamic equation of the motion the fix-point technique is inserted into the time marching iteration. The results are plotted in figures. Streszczenie. W artykule opisano badania reakcji sztywnej, stalowej kolumny z masą na szczycie, na dzialanie wzrastającej wykladniczo sily skrecającej. W celu zamodelowania zamontowanego na stale konca kolumny, wykorzystano polsztywną sprezyne wirową, ktorej nieliniowy charakter jest określony poprzez model histerezowy Preisacha. W celu rozwiązania rownania ruchu, dokonano jego dyskretyzacji. Przedstawiono wyniki symulacyjne. (Histereza w polsztywnych polączeniach stalowych).

Physica B: Condensed Matter, 2004

Przegląd Elektrotechniczny, 2003

Compel the International Journal For Computation and Mathematics in Electrical and Electronic Engineering, Apr 11, 2013

... Amália Iványi, Department of Electromagnetic Theory, Technical University of Budapest, Budape... more ... Amália Iványi, Department of Electromagnetic Theory, Technical University of Budapest, Budapest, Hungary. Abstract. ... Results and conclusion. For the calculation a normal DC current was investigated because of the used current excitation during the measurements. ...

Proceedings of the Fifth International Conference on Engineering Computational Technology, 2000

J Magn Magn Mater, 2002

ABSTRACT The investigation of the magnetic field in a circular-shaped single sheet tester is deve... more ABSTRACT The investigation of the magnetic field in a circular-shaped single sheet tester is developed under circular polarised field intensity as well as flux density. The non-linear anisotropy of the material is represented by a vector realisation of the Jiles-Atherton hysteresis operator. The monitored data of the components in the field vectors are simulated with the averaged values of the field resulted by the numerical analysis of the non-linear eddy current problem. (C) 2002 Published by Elsevier Science B.V.

Pollack Periodica, 2006

In this paper a non-linear parabolic PDE-based diffusion model is applied to enhance thermal imag... more In this paper a non-linear parabolic PDE-based diffusion model is applied to enhance thermal images. The proposed smoothing technique is a non-linear time-variant system, in which the diffusivity field depends on the local characteristics of the image. The non-linear diffusion is controlled by human knowledge based linguistic rules. Some examples of intensity dependent diffusion, of edge preserving filters and their aggregates are presented. The image details in the interested regions are preserved while in other regions the variations of pixel intensities are attenuated. With the proposed fuzzy-technique a strongly non-linear diffusivity function can be defined in a user-friendly way.

Physica B Condensed Matter, 2004

Simulation of a simple arrangement and modeling the scalar hysteresis characteristics can be used... more Simulation of a simple arrangement and modeling the scalar hysteresis characteristics can be used advantageously when the magnetic field intensity and the magnetization are in the same direction (e.g. toroidal-shaped coil). In many cases, it is not enough to apply the scalar hysteresis model, but a more powerful and more complicated hysteresis model must be developed to describe the vector

Physica B Condensed Matter, 2001