Influence of Magnetic Property of Electrical Steel Sheets of Transformer on Eddy Current Loss

Yamaguchi, Tadashi; Kawase, Yoshihiro; Ishimura, Shota

doi:10.14243/jsaem.27.67

Cited by 1 publication

(3 citation statements)

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“…Eddy currents are not limited by the joint area of the laminated core but acting within the entire lamination sheet. The loss is generated under the severe skin effect condition and related to the magnitude of the normal magnetic flux and width of the lamination: where s ≈ 0.5 (15) Hence, the loss produced by the normal flux in "steplap" joints is in four times higher than the power loss the joint area of the similar core assembles using "butt-lap" techniques.…”

Section: Discussionmentioning

confidence: 99%

“…A variety of studies [10]- [13] providing numerical analysis of electromagnetic field and the power loss in the core joints formulate the problem using the joint overlap length t j instead of the lamination width b. 3-D modelling was applied for numerical analysis of losses in the transformer joint area [14], [15]. However, the influence of the lamination width b was not taken into account in these studies.…”

Section: Fig 1bmentioning

confidence: 99%

“…Investigation of additional losses in the joints of laminated magnetic core presented in [7]- [15] is based on conventional, widely recognised structure of the power loss in electrical steels proposed by Bertotti [2], [16]. However, this approach does not provide detailed analysis of the losses associated with the magnetic flux transfer through adjacent layers (from lamination to lamination) of the core.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis and Experiential Verification of Power Loss in Joint Area of Laminated Transformer Core

Kalinin

Chivenkov

Vagapov

et al. 2021

2021 56th International Universities Power Engineering Conference (UPEC)

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This paper discusses the processes of power loss development in the joint area of the laminated transformer core due to eddy currents produced by the normal magnetic flux. Normal magnetic flux is directed in perpendicular to the plane of the laminations and the dominating factor in the power loss formation in the joint area. The analytical approach was verified by a set of tests where two experimental setups have been employed to investigate power loss in the laminations under various conditions. The tests provided data on the power loss produced by the normal flux in relation to the lamination width and lamination overlap length. It was shown that the power loss in the joint area significantly depends on the lamination width and is independent of lamination overlap.

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Section: Discussionmentioning

confidence: 99%