4:30pm - 4:50pm
A Continuous Vector Preisach Model Based on Vectorial Relay Operators
Technical University of Munich (TUM), Germany
This paper introduces a new variant of a vector Preisach model. The model is composed of vector relay operators and discrete versions have already been used to model hysteretic material behavior in finite element analysis. The usage of a discrete hysteresis model thereby introduces several complications. The variant of the model proposed in this work enables a continuous evaluation of the model, given that the model input can be approximated by a piecewise linear function. This is achieved by allowing infinitely many, however not arbitrarily distributed vector relay operators. The paper is limited to the case of relay operators with circularly or spherically shaped corresponding critical surfaces. The model parameters are identified using measured hysteresis loops and the model is applied in a finite element analysis.
4:50pm - 5:10pm
Using a Modified Elliot Transfer function on the hysteresis G model coupled to a 3D FEM code
1UNOESC, Brazil; 2GRUCAD UFSC, Brazil; 3PPGESE UFSC, Brazil
In a previous work, the G model, for hysteresis modeling of ferromagnetic materials, was proposed. One of the relevant advantages of the G model is its simplicity compared with classical methods. Here, we present the firsts steps to insert the model in a 3D FEM code. Also, as a contribution, the Elliot Transfer function is modified on the way it matches the experimental B(h) curves with good accuracy. Therefore, the main goal here is to investigate its robustness and accuracy when treating a benchmark case under the conditions just mentioned. The parameters characterization is explained and discussed and the model implementation and coupling with the FEM code will be detailed in the full paper.
5:10pm - 5:30pm
Comparison of identification protocols of a static hysteresis model
1Univ Lyon, Université Claude Bernard Lyon 1, ECLyon, INSA Lyon, Ampère, F-69100, Villeurbanne, France; 2Univ Lyon, ECLyon, Université Claude Bernard Lyon 1, INSA Lyon, Ampère, F-69130, Ecully, France; 3Institute Montefiore - ACE - Université de Liège, B-4000 Liège, Belgium
In order to predict magnetic quantities in the magnetic cores of electrical devices scientists and engineers need hysteresis models sufficiently accurate. Whatever the chosen model is, a dedicated identification protocol has to be elaborated requiring more or less specicfic measurements. This article compares, at least, two identification protocols of the same hysteresis model parameters. The protocols themselves, their inputs and outputs and their accuracy are detailed and discussed.
5:30pm - 5:50pm
Analysis of the magneto-mechanical behavior of non-oriented steel sheets for different microstructure properties
1Department of Electrical Engineering and Automation, Aalto University, Espoo, Finland; 2Department of Chemistry and Materials Science, Aalto University, Espoo, Finland
In this paper, we investigate the impact of the texture properties on the magneto-mechanical behavior of non-oriented steel sheets. The magnetization and the magnetostriction of the material are evaluated with the multiscale model for some textures with various grain orientations and grain volume fractions.
5:50pm - 6:10pm
Magnetic hysteresis under compressive stress: a multiscale-Jiles-Atherton approach
1GRUCAD-UFSC, Brazil; 2IFSC, Brazil; 3GeePs, France
Based on a multiscale modelling of the anhysteretic magnetization taking into account texture effects, an extension of the JilesAtherton (J-A) hysteresis model is proposed. The magnetization and the volume fractions given by the multiscale approach are advantageously used in the J-A model to modify the anhysteretic magnetization and the pinning parameter. The parameters of the proposed model are identified in order to fit with experimental characterization results under compressive stress.