Core loss depending on magnetizing angle from easy axis in grain-oriented 3% silicon-iron

The profiles of ac hysteresis loops have been measured as function of the angle phi between H-field and [001] axis in (110)[001] grain oriented 3% silicon-iron. As phi increases, for phi greater than or equal to 30degrees the loop changes into a wasp-waisted shape with inflection points. The observed ac hysteresis loop profiles have been analyzed in terms of domain reorientation under field. The core losses in silicon-iron are measured for various magnetizing angles with respect to the easy axis at magnetizing frequency 50 Hz and 60 Hz and at magnetic induction 1.3 T and 1.0 T. At magnetic induction 1.3 T, the core loss increased to near 70degrees and decreased at magnetizing frequency 60 Hz, but at 50 Hz this trend was different from 60 Hz and the core loss was monotonously increased. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.