Anisotropy of losses in non-segmented assemblies of grain-oriented steel with circular easy axis distribution

This study explores the frequency-dependent magnetic losses in grain-oriented non-segmented cores with layers shifted by a constant angle, creating a circular distribution of easy axes across the core, up to 500 Hz. This innovative approach reduces magnetic losses by aligning the flux with the rolling direction in each layer, enabling the development of energy-efficient cores for AC rotating machines. We decompose the total losses into hysteresis and dynamic components as functions of frequency, peak induction, and shifting angle. The results reveal that this anisotropy predominantly affects the domain wall-generated losses, including both static and dynamic components. Notably, shifting the layers by ∼60° minimizes hysteresis losses by optimizing the alignment of the easy magnetization axes with the hard axes between adjacent layers. The dynamic hysteresis loops are decomposed into their respective portions, demonstrating the contributions of each individual loss component.