Open AccessModelling of minor hysteresis loops in rolling and transverse directions of grain‐oriented laminations
Author(s) -
Baghel Ajay Pal Singh,
Chwastek Krzysztof,
Kulkarni S.V.
Publication year - 2015
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
ISSN - 1751-8679
DOI - 10.1049/iet-epa.2014.0268
Subject(s) - hysteresis , transverse plane , materials science , minor (academic) , grain size , mechanics , condensed matter physics , composite material , structural engineering , engineering , physics , political science , law
The paper presents a modelling approach for symmetrical minor hysteresis loops in the rolling (RD) and transverse (TD) directions for grain‐oriented (GO) laminations. A recently proposed modified Jiles–Atherton model which considers crystallographic orientation of GO laminations is extended to predict RD and TD minor loops. A power scaling rule for updation of model parameters is applied for the purpose. Two model parameters ( k and a ) are updated with the maximum flux density in RD. It gives reasonably accurate prediction in this direction. On the other hand, in TD, three model parameters ( k , a and c ) are modified to predict minor loops accurately. The proposed model is validated using measured curves in both directions. A close agreement is observed between computed and experimental ones. The model is useful for design and analysis of core joints and corners under rotating and distorted flux patterns.