Stress-Induced Magnetization Process in Shifted Grain-Oriented Steel Ring Cores

Electrical steel's magnetic properties in industrial applications often differ from theoretical predictions due to assembly-induced mechanical stresses. In this study, we evaluate the impact of compressive stress applied perpendicular to the core on the magnetic behavior of structures crafted with an innovative approach. Utilizing shifted grain-oriented Fe-Si steel rings, the strategy effectively alleviates magnetic losses and mitigates magnetostriction-related vibrations. Insights into complex magnetization processes are revealed through the analysis of first-order reversal curves (FORC), demonstrating stress-induced alterations in hysteresis loops and FORC diagrams. Under the applied stress, an additional magnetization process emerges at low magnetic fields, resulting from domain reorganization and interacting with the effects introduced by shifting the layers within the core.