PARAMETER-IDENTIFICATION OF THE COMPLETE-MOVING-HYSTERESIS MODEL FOR HTS STEEL

This paper discusses an extension to soft magnetic materials of the id entification method of the CMH model which was originally introduced f or medium hard magnetic materials. The proposed Preisach function for HTS steel, a soft magnetic material, is normal in the interaction fiel d and is assumed to be lognormal in the critical field. Although the P reisach function is not symmetrical, the logarithm of the operative Pr eisach function is. However, the moving parameter, alpha, can not be o btained by finding the value that removes this asymmetry because of th e presence of apparent reversible magnetization and the lognormal natu re of the Preisach function. All the Preisach parameters can be obtain ed using the major curve and the virgin curve only. For HTS steel, the squareness is 0.004, indicating a small irreversible magnetization co mponent. The coercivity is 8.6 Oe; whereas the remanence coercivity is an order of magnitude larger, namely 123.5 Oe.