Relaxation methods applied to the problem of a.c. magnetization of ferromagnetic laminae

Butler, O.I.; Sarma, Meera

doi:10.1049/pi-2.1951.0112

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…Find waveforms between which to interpolate, i.e., find such l that H m,l ≤ H m < H m,l+1 ; if this is not possible, use the last two waveforms; 2f. Calculate the interpolation factor using Equation (19); 2g. Calculate a, b and the time displacement using Equation (17).…”

Section: Conversion Between H and B Fieldsmentioning

confidence: 99%

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An Improved Approach to Calculate Eddy Current Loss in Soft Magnetic Materials Based on Measured Hysteresis Loops

Jabłoński

Najgebauer

Bereźnicki³

2022

Energies

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The paper presents a study of the influence of magnetic hysteresis on macroscopic eddy current losses. Usually, this loss is calculated within many simplifying assumptions, of which the most striking is not only neglecting the hysteresis, but also the nonlinearity of the material. To check how such simplifications affect the results, the loss was calculated taking into account the hysteresis phenomenon for several materials. For this purpose, an algorithm for solving Maxwell’s equations with magnetic characteristics given as a family of measured hysteresis loops was constructed. A new method for conversion between H and B fields using the measured hysteresis loops was also proposed. The results of calculations for three materials show that the eddy current loss calculated with magnetic hysteresis taken into account are smaller than those calculated via the classical formula obtained for linear materials. For the tested materials, the differences reach up to around 30%, depending on frequency, magnetic flux density and thickness of electrical sheet. This may result, among others, in erroneous determination of the excess loss in Bertotti’s approach.

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Section: Conversion Between H and B Fieldsmentioning

confidence: 99%

“…There have been numerous attempts at including magnetic hysteresis into calculations of fields and eddy current loss, e.g., [19][20][21][22]. Solving the field equations with measured magnetization characteristics taken into account (hysteresis loop family or nonlinear B(H) curves) usually requires a numerical approach.…”

Section: Introductionmentioning

confidence: 99%

An Improved Approach to Calculate Eddy Current Loss in Soft Magnetic Materials Based on Measured Hysteresis Loops

Jabłoński

Najgebauer

Bereźnicki³

2022

Energies

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“…There are three main ideas for modeling the hysteresis systems. First method is fundamental analysis based on physical principles of the system, resulting in a large dynamic system [4], [5]. Although the method is the most accurate model, modeling comprehensive internal mechanisms of the system is mandatory, so it is complicated.…”

Section: Hysteresis Lossesmentioning

confidence: 99%

Hysteresis loss in brushless doubly fed induction machines

Ahmadian¹,

Jandaghi²,

Oraee³

2011

REPQJ

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Brushless doubly fed machine (BDFM) is a potential for future wind energy generation, due to its lower maintenance costs and higher reliability than conventional doubly fed systems. While efficiency and design optimization of the machine has become critical issues recently, no analytical core loss model is investigated in the literature. Furthermore, core loss modeling is different from conventional induction machines, because of double frequency excitation of the machine. In this paper, a dynamical system is used for modeling of hysteretic behavior of iron core, and hysteresis losses of BDFM are analyzed and modeled mathematically. The flux waveforms of BDFM are assumed pure double sine, as in wound rotor BDFM lower harmonic values than nested loop design exist.

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The effect of third harmonic flux distortion on the core losses in thin magnetic steel laminations

Lavers

Biringer

Hollitscher

1977

IEEE Trans. on Power Apparatus and Syst.

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Relaxation methods applied to the problem of a.c. magnetization of ferromagnetic laminae

Cited by 3 publications

References 7 publications

An Improved Approach to Calculate Eddy Current Loss in Soft Magnetic Materials Based on Measured Hysteresis Loops

An Improved Approach to Calculate Eddy Current Loss in Soft Magnetic Materials Based on Measured Hysteresis Loops

Hysteresis loss in brushless doubly fed induction machines

The effect of third harmonic flux distortion on the core losses in thin magnetic steel laminations

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