Stress-dependent Iron Loss in Segmented Laminations Considering Surface Roughness

Zhu, Y; Mecrow, B; Atkinson, G; Deng, X; Liu, G

doi:10.1109/ICEM60801.2024.10700393

Stress-dependent Iron Loss in Segmented Laminations Considering Surface Roughness

Lookup NU author(s): Professor Barrie Mecrow, Dr Glynn Atkinson, Dr Xu Deng ORCiD

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Abstract

The paper studies the effects caused by the interface of two separate, or segmented laminated components, with particular emphasis upon reluctance and iron loss. The quality, or smoothness, of the lamination cut edge at the interface of two components is shown to be important, and so the influence of surface roughness at the interface between two adjacent segmented laminations is considered. In general, the smoother the interface surfaces, the smaller the effective gap. Consequently, the surface roughness at the interface of components has a direct influence upon the reluctance of the magnetic circuit. The impact of roughness is experimentally tested and analyzed in detail to determine how it also affects iron loss. The mechanical compressive stress between segments is also considered, given that there must be pressure between adjacent laminated segments. The paper seeks to understand how changing the surface roughness and compressive stress can influence iron losses in segmented electrical machines.