Approximate prediction of losses in transformer plates

Abstract

Three methods are presented for the approximate prediction of losses in laminated transformer cores. The input data of the calculations are the field distribution obtained by a FEM code assuming the laminated core as a homogeneous medium that conductivity is zero in the direction perpendicular to the lamination. These data are processed by the developed methods to obtain an agreeable approximation of the power losses in the transformer plate. For each approach the same benchmark problem is solved to exploit the properties of the approaches. The goal of the presented study is to select the most suitable method that can be used as a postprocessor of a FEM code.