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Lecointe, Jean-Philippe
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Topics
Publications (10/10 displayed)
- 2024Impact of GOES grade mixing on the iron losses of single-phase magnetic corescitations
- 2024Numerical modeling of magnetic cores with combined electrical steel grades
- 2023Power density improvement of axial flux permanent magnet synchronous motor by using different magnetic materialscitations
- 2023Power density improvement of axial flux permanent magnet synchronous motor by using different magnetic materialscitations
- 2023Impact of GOES grade mixing on the iron losses of single-phase magnetic cores
- 2022Using grain oriented electrical steel sheets for electric motor in automotive application: Tooth segmentationcitations
- 2021The use of Grain Oriented Electrical Steel Sheets for Electric Motor in Automotive Application : Tooth Segmentation
- 2016A new approach to the critical induction in transformer corescitations
- 2016Determination of Specific Losses in the Limbs of an Epstein Frame Using a Three Epstein Frame Methodology Applied to Grain Oriented Electrical Steelscitations
- 2013Analysis of the Magnetic Flux Distribution in a New Shifted Non-Segmented Grain Oriented AC Motor Magnetic Circuitcitations
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article
A new approach to the critical induction in transformer cores
Abstract
The most critical areas in power transformers are their corner joints where the magnetic flux distribution presents a very high heterogeneity. This heterogeneity results from several parameters such as the geometry of the magnetic core, the anisotropy level of the electrical steel laminations and a critical induction. This paper is focused on the magnetic steel grades influence on the critical induction, adding a new parameter to those classically considered, such as the number of steps in a multiple step lap stack. Due to the difficulty to perform local measurements inside a real transformer corner, the study is performed both experimentally and by Finite Element analyses on a simplified magnetic core structure. The paper highlights that, in a corner of a core, it exists a critical induction level which depends on the magnetic steel grades and that, in a lamination, the magnetic flux density value along the Transverse Direction can be of the same order that it has along the Rolling Direction.