A new approach to the critical induction in transformer cores - Archive ouverte HAL Access content directly
Journal Articles International Journal of Applied Electromagnetics and Mechanics Year : 2016

A new approach to the critical induction in transformer cores

(1) , (1) , (1) , (1) ,
1

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.
Fichier principal
Vignette du fichier
2016_IJAEM_RP_GP_JPL_JFB_TB_vPublication.pdf (11.63 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03350749 , version 1 (17-05-2022)

Identifiers

Cite

Guillaume Parent, Rémi Penin, Jean-Philippe Lecointe, Jean-François Brudny, Thierry Belgrand. A new approach to the critical induction in transformer cores. International Journal of Applied Electromagnetics and Mechanics, 2016, 50 (4), pp.583-592. ⟨10.3233/JAE-150135⟩. ⟨hal-03350749⟩

Collections

UNIV-ARTOIS
19 View
12 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More