

Author: Gyselinck J Melkebeek J
Publisher: Emerald Group Publishing Ltd
ISSN: 0332-1649
Source: COMPEL: Int J for Computation and Maths. in Electrical and Electronic Eng., Vol.20, Iss.1, 2001-01, pp. : 253-268
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
The influence of overlap joints in transformer cores on the local flux and eddy current distribution and on overall transformer characteristics is studied by means of two-dimensional finite element (2D FE) models. A simplified 2D FE model of a single overlap joint is used for estimating the resulting increased magnetomotive force and increased eddy current losses. Both effects can be accounted for in a 2D FE model of the complete transformer by locally adopting modified material characteristics (viz. BH-curve and electrical conductivity) in the cross-section of the core. This novel method is demonstrated and validated by applying it to a three phase transformer. The calculated no-load currents and losses are compared to the measured ones.
Related content


By Gyselinck J. Dular P. Vandevelde L. Melkebeek J. Oliveira A.M. Kuo-Peng P.
COMPEL: Int J for Computation and Maths. in Electrical and Electronic Eng., Vol. 22, Iss. 4, 2003-12 ,pp. :





