The passive magnetic ferrite components used in EMI filters have a complex permeability (CMP) which varies with frequency. CMP frequency range from 150 kHz to 30MHz is not given by manufactures. Moreover, measurement techniques require some specific size and shape of sample measure ferrites. Common application these passives are filters, where toroid cores need be characterized determine the insertion loss function. In this paper procedure proposed. leakage inductance parasitic capacitance...

The switching of the power semiconductors in static converters is main source electromagnetic interferences (EMI). To meet with compatibility standards, it necessary to reduce level conducted emissions. This reduction can be achieved by different techniques including EMI filters whose design mainly based on use ring core inductors. element a key point for designing efficient filters, requiring then accurate inductor high-frequency (HF) models. Therefore, this paper deals development an HF...

Purpose Although the original Jiles‐Atherton (J‐A) hysteresis model is able to represent a wide range of major loops, in particular those soft magnetic materials, it can produces non‐physical minor loops with its classical equations. The purpose this paper show modification J‐A order improve and inner representation. proposed technique allows representing non‐centred accuracy as well improving symmetric Design/methodology/approach Only irreversible magnetization component slightly modified...

To take account of the uncertainties introduced on soft magnetic materials properties (magnetic behavior law, iron losses) during manufacturing process, present work deals with stochastic modeling law B-H and losses claw pole stator generator. Twenty-eight samples slinky (SS) coming from same production chain have been investigated. The used approaches are similar to those in mechanics. accuracy existing anhysteretic models has tested first using cross validation techniques. well known loss...

The stray load losses (SLLs) in electrical machines represent a nonnegligible contribution of the total and key point for an accurate evaluation energy efficiency considered device. In this paper, one aspect these SLLs, end-region leakage fluxes losses, is investigated case high-power cage induction motor. study performed at locked rotor, no-load, rated conditions using 3-D finite-element modeling approach. influence flux on conductive parts motor analyzed together with eddy current loss...

The stray load losses in electrical machines represent a non-negligible contribution of the total and are key point for an accurate evaluation energy efficiency considered device. In this paper, methodology using 3-D finite-element (FE) modeling approach posteriori loss calculation is presented estimation losses. case cage induction motor investigated, results compared with experiment. simulation performed at different conditions FE model external circuit coupling.

This paper deals with the calculation of iron losses in a turgenerator using magnetodynamic finite element (FE) analysis accounting for eddy currents damper bars. Two loss models, based on Berttoti's decomposition approach, are compared postprocessing step FE calculation. The numerical model studied system is validated by comparing and experiment no-load conditions.

In this work an approach for modeling a transformer core taking into account magnetic hysteresis is presented. For purpose, the inverse vector Jiles-Atherton model incorporated in 2D finite element code. This allows writing naturally differential reluctivity tensor which can be directly used field equations. A three-phase modeled. The excitation characteristics of transformer, as well loops at specific points, are proposed was verified with obtained experimental data.

This paper presents a 2-D finite-element model to analyze the iron losses in three-phase transformer. In this model, effects of nonlinear core behavior are taken into account by means vector hysteresis incorporated formulation using magnetic differential reluctivity tensor. The tensor emerges naturally from vectorized Jiles–Atherton model. complete includes eddy current and anomalous losses. magnetization currents calculated compared with measured ones. Calculations loops at spotted points...

This paper presents a study on iron loss estimation for solid rotor induction motor fed by pulsewidth modulated supply. The losses are often determined using an posteriori method that can lead to more or less important deviations, compared with measurements, depending the used models and implementation techniques. methodology proposed here consists of computing analytical implemented in post-processing 2-D finite-element analysis. Different techniques investigate impact model loss.

Inrush currents have undesired effects on transformers when these ones are, for example, switched into service. Theses to be taken account designing a transformer, what leads constraint its magnetic core and size definition. This paper investigates the modeling of inrush in three phase transformer under sinusoidal voltage operation conditions. The is modeled taking hysteresis including anisotropy. Therefore, Jiles-Atherton vectorized model used nonlinear modeling. key advantage this vector...

The Non-Intrusive Spectral Projection (NISP) method is widely used for uncertainty quantification in stochastic models. determination of the expansion solution on polynomial chaos requires computation multidimensional integrals. An automatic adaptive algorithm based nested sparse grids has been developed to evaluate those adapted takes into account weight each random variable with respect output model. To achieve that it constructs anisotropic grid mean, leading a reduction number numerical...

In this article, the anhysteretic Sablik model is identified from measurements and implemented in a finite-element (FE) code. The takes into account effect of plastic deformation through dislocation density, thus, enables to for degradation magnetic properties. A new magnetostriction proposed model. Experimental data are used identify parameters both magnetostriction. Furthermore, mechanical punching process an electrical steel sheet simulated view evaluating strain distribution near punched...

Systematic Raman scattering investigations were carried out on TPP during the isothermal transformations of supercooled liquid into glacial state, in 210−230 K temperature range. From these experiments glaciation process can be interpreted terms aborted crystallization. This study reveals that crystallization aborts a distinctive stage, i.e., state composed crystallites stable crystalline characterized by size strongly dependent aging temperature. The considered nanometric or micrometric...

Manufacturing processes may introduce a significant variability on the magnetic properties of claw pole generator stators.The present work deals with analysis two groups stator samples.The first group is composed 28 slinky stators (SS) and second 5 stators, manufactured using laser cut stacked laminations (SL).Both are made from same lamination grade geometrical dimensions.Characterization was carried out for several levels excitation field at 50Hz.A noticeable has been observed iron losses...

High operating temperatures modify the magnetic behavior of ferromagnetic cores which may affect performance electrical machines. Therefore, a temperature-dependent material model is necessary to machine more accurately during design process. Physics-inspired hysteresis models, such as Jiles-Atherton (JA) model, seem be promising candidates incorporate temperature effects and can embedded in finite element simulations. In this paper, we have identified JA parameters from measurements for...

This paper describes the relations between microstructure, mechanical properties, and electromagnetic behavior of carbon steel wires submitted to different thermomechanical treatments. The electrical resistivity bulk magnetic properties are determined through measurements down 2 K hysteresis loop measurements. In addition, domains imaged by force microscopy despite complex microstructures. mainly related changes in volume fraction, morphology, distribution cementite phase within α-ferrite...

Improvement of the magnetic performances soft composites (SMC) materials requires to link microstructure macroscopic behavior law. This can be achieved with finite-element method using geometry reconstruction from images microstructure. Nevertheless, it lead large computational times. In that context, proper generalized decomposition (PGD), is an approximation originally developed in mechanics, and based on a finite sum separable functions, interest our case. this work, we propose apply PGD...

Permanent magnets are commonly used in electromechanical energy conversion devices, especially permanent magnet synchronous machines (PMSM). When designing such it is necessary to take account for the operating conditions of magnets. Ideally, point lies on a linear reversible demagnetization characteristic. Nevertheless, (temperature, field, etc.) may have great influence magnetic characteristic that becomes strongly nonlinear and lead magnetization loss magnet. Consequently, impact also...