Total AC loss of Ag-sheathed Bi2223 tapes with various filament arrangements carrying ACtransport current in AC parallel transverse magnetic field

Abstract

For the applications of Bi2223 tapes as the strands to power cables with multilayerstructures, the tapes must carry the AC transport current in an AC parallel transverse fieldwith various field amplitudes depending on the layer positions. In this study, weexperimentally investigated the total AC loss characteristics under parallel transverse fieldfor Bi2223 tapes with various filament arrangements in their cross sections. The tapes withdifferent filament arrangements in the final tape sections were prepared by a conventionalpowder-in-tube (PIT) process with drawing using round dies and a rectangular deformationprocess using a two-axial rolling (TAR) technique. Total AC losses in the tapescarrying AC transport current in an AC parallel transverse field were measured bymeans of the electromagnetic method. The measured loss values in the tapes werecompared with several analytical models. Based on the experimental results, theinfluence of filament arrangements on total AC loss behaviour is discussed, under thedifferent operating conditions with various amplitudes of current and applied field.