End-Region Losses in High-Power Electrical Machines: Impact of Material Thickness on Eddy Current Losses in Clamping Structures

Walid Mohand Oussaid (), Abdelmounaïm Tounzi, Raphaël Romary, Abdelkader Benabou, Walid Boughanmi and Daniel Laloy
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Walid Mohand Oussaid: L2EP, Arts et Métiers Institute of Technology, University of Lille, Centrale Lille, Junia, ULR 2697—L2EP, 59000 Lille, France
Abdelmounaïm Tounzi: L2EP, Arts et Métiers Institute of Technology, University of Lille, Centrale Lille, Junia, ULR 2697—L2EP, 59000 Lille, France
Raphaël Romary: Laboratoire Systèmes Électrotechniques et Environnement (LSEE), University of Artois, UR 4025, 62400 Béthune, France
Abdelkader Benabou: L2EP, Arts et Métiers Institute of Technology, University of Lille, Centrale Lille, Junia, ULR 2697—L2EP, 59000 Lille, France
Walid Boughanmi: JEUMONT Electric, 59572 Jeumont, France
Daniel Laloy: JEUMONT Electric, 59572 Jeumont, France

Energies, 2024, vol. 17, issue 22, 1-14

Abstract: High-power electrical machines often utilize clamping structures composed of various materials with specific geometric dimensions to secure the stator laminations. These structures are exposed to end-region magnetic flux, which induces eddy currents, leading to significant power losses that reduce the machine’s efficiency. This study systematically investigates the impact of clamping plate thickness on eddy current losses across different materials and operating frequencies. A simplified experimental configuration was established to validate the numerical model developed using 3D Finite Element Method (FEM). This model was used to calculate the eddy current losses and analyze the influence of plate thickness under various conditions. A comprehensive parametric analysis was performed, revealing critical insights into the relationship between material properties, plate thickness, and loss generation. The findings indicate that while thinner plates exhibit higher current density, thicker plates provide a larger volume for current flow, resulting in varying loss patterns depending on the material’s electrical and magnetic properties. The study’s results offer valuable guidance for optimizing clamping structure designs in high-power electrical machines by selecting materials and thicknesses that minimize losses while maintaining mechanical integrity.

Keywords: eddy current losses; electrical machines; end-region; finite element method; clamping plates and fingers; materials for electrical machines; skin effect (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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