AC loss density component in electrical steel sheets

Chwastek, Krzysztof

doi:10.1080/09500839.2010.508442

Cited by 13 publications

(15 citation statements)

References 60 publications

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“…This model assumes that power losses are scale-invariant phenomena. On the contrary, some authors propose models composed of two loss components [5,6]. A description of power losses in the form of a power law equation is also used [7][8][9], including technical reports [10].…”

Section: Introductionmentioning

confidence: 99%

Scaling-Based Analysis and Modelling of Power Losses in Amorphous and Nanocrystalline Alloys

Najgebauer

2017

Acta Phys. Pol. A

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The paper presents the scaling-based approach to analysis and modelling of power losses in Fe-based amorphous and nanocrystalline alloys. Production technology and properties of these alloys are briefly presented. For each sample, a family of measured loss curves are collapsed onto a single one using appropriate estimated scaling parameters. An interpretation of the fractional exponent is discussed. The scaling analysis is used in the modelling of power losses for the considered alloys. The results of power loss modelling and obtained errors are presented.

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Section: Introductionmentioning

confidence: 99%

Scaling-Based Analysis and Modelling of Power Losses in Amorphous and Nanocrystalline Alloys

Najgebauer

2017

Acta Phys. Pol. A

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“…Some problems with the statistical three‐term theory of losses, in particular its inconsistence with results from the numerical solution provided by the nonlinear diffusion equation (Bertotti and Mayergoyz, 2005; Mayergoyz, 1988), were described elsewhere (Chwastek, 2010a). From the viewpoint of the presented paper, it should be stressed that there is a significant discrepancy between the predictions of Bertotti's theory and experiment for increased excitation frequencies in GO steels (Derebasi et al , 2003).…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Hysteresis curves of a resistance spot welding transformer

Petrun

Chwastek

Dolinar

2013

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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PurposeThe aim of the paper is to provide a simple and reliable hysteresis model for prediction of magnetization curves of a resistance spot welding transformer (RSWT) core, operating in a wide range of flux densities and excitation frequencies.Design/methodology/approachThe hysteresis model considered in the paper is the T(x) description advanced by J. Takács. Three options to extend the model to the dynamic magnetization conditions are considered. The excitation conditions differ from those prescribed by international standards.FindingsThe quasi‐static Takács model combined with a fractional viscosity equation similar to that proposed by S.E. Zirka outperforms other considered options. The effect of eddy currents may be considered as a disturbance factor to the frequency‐independent quasi‐static hysteresis loop.Research limitations/implicationsThe combined approach yields in most cases a satisfactory agreement between theory and experiment. For highest frequency considered in the paper (1 kHz) excessive “heels” were observed in the modelled loops. This artifact may be reduced by the introduction of a more complicated relationship for the viscous term. Future work shall be devoted to this issue.Practical implicationsThe combined Takács‐Zirka model is a useful tool for prediction of magnetization curves of a RSWT core in a wide range of flux densities and excitation frequencies.Originality/valueThe usefulness of the Takács description has been verified in a practical application. The model is able to predict magnetization curves under non‐standard excitation conditions.

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“…Due to intrinsic limitations or inconsistencies of both theories (drawbacks of Bertotti's theory are revealed e.g. in [11,25,31] the hybrid approach is not a perfect solution to the problem. Papers [20,23] considered another approach, where total loss was separated into just two terms, the first one related to quasi-static hysteresis and the second one -to eddy currents induced in a wide spectrum of time-and spatial scales.…”

Section: Effect Of Eddy Currentsmentioning

confidence: 99%

Higher order reversal curves in some hysteresis models

Chwastek¹

2012

Archives of Electrical Engineering

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Some physical concepts important for a hysteresis model (effective field, anhysteretic magnetization) are discussed on the example of Jiles-Atherton model. The Jiles-Atherton model reveals some drawbacks, which make this model more difficult to be applied in electrical engineering. In particular, it does not describe accurately the magnetization curves after a reversal, moreover complex magnetization cycles are poorly represented. On the other hand, the phenomenological description proposed by Takács seems to be a valuable alternative to the Jiles-Atherton formalism. The concept of effective field may be easily incorporated in the description.

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AC loss density component in electrical steel sheets

Cited by 13 publications

References 60 publications

Scaling-Based Analysis and Modelling of Power Losses in Amorphous and Nanocrystalline Alloys

Scaling-Based Analysis and Modelling of Power Losses in Amorphous and Nanocrystalline Alloys

Hysteresis curves of a resistance spot welding transformer

Higher order reversal curves in some hysteresis models

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