Anomalous iron losses in cold-reduced grain-oriented transformer steel

Brailsford, F.; Fogg, R.

doi:10.1049/piee.1964.0242

Cited by 14 publications

(5 citation statements)

References 8 publications

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“…This movement occurs even at very low magnetization frequencies. Therefore, firstly, the component has been associated with the hysteresis loss [52][53][54], and it was not until later that it was combined with micro eddy currents created by the domain wall movement. The literature reports on numerous attempts to establish some relationships between the excess loss and the non-uniform distribution of permeability in the sample cross section.…”

Section: Specific Total Loss Modelmentioning

confidence: 99%

The Effect of Magnetic Anisotropy on the Computed Specific Total Loss in Electrical Steel

Pluta

2024

Energies

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Grain-oriented (GO) electrical steel (ES) laminates are still very important in industrial applications due to their remarkable crystallographic properties. Cores of large electrical machines and transformers are built from ES. The performances of these devices are significantly influenced by the properties of ES. The improvement of ES properties has been the subject of considerable research for many years. The phenomenon of magnetic anisotropy is highly non-linear, and it should be taken into account by the designers of magnetic circuits. The article proposes a modified model for calculating the angular properties of specific total loss of ES. The modeling takes into account the isotropic component (from classic eddy currents) and the anisotropic component, which is the sum of hysteresis and excess losses. For the directional loss modeling, the Boltzmann function was used. An analysis of the dependency of model coefficients on the frequency is presented.

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Section: Specific Total Loss Modelmentioning

confidence: 99%

The Effect of Magnetic Anisotropy on the Computed Specific Total Loss in Electrical Steel

Pluta

2024

Energies

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“…The sum of PE and PA is usually referred to as the apparent eddy current loss, 11) and it can be separated from PH by the analysis of the total loss at different frequencies. PH increases linearly with the frequency f, while the apparent eddy current loss has a f 2 -dependence.…”

Section: Magnetic Property Measurementsmentioning

confidence: 99%

Effect of Phosphorus on the Magnetic Losses of Non-oriented 2% Si Steel

Lee

Cooman

2012

ISIJ Int.

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The effect of P, ranging from 0.0 to 0.10 mass%, on the core losses of electrical steels containing 2.0 mass% silicon has been investigated. The core losses were separated into hysteresis losses, classical eddy current losses and anomalous losses. The hysteresis losses were found to decrease with increasing P content due to a larger grain size brought about by P additions. The anomalous losses were proportional to the square root of the grain size, and decreased with increasing volume fraction of grains with a ND || <111> orientation. The lowest anomalous losses were obtained at 0.05 mass% P content.

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“…It has long been inferred that hysteresis loss per cycle is not independent of magnetizing frequency [35,36]. Previously, excess or anomalous loss has been linked to Barkhausen noise [37].…”

Section: Potential Future Use Of Real-time Imagingmentioning

confidence: 99%