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

Abstract

The profiles of ac hysteresis loops have been measured as function of the angle Φ between H-field and [001] axis in (110)[001] grain oriented 3% silicon-iron. As Φ increases, for Φ≥30° 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 70° 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.