The results of numerical and experimental analysis of passive magnetic bearings are presented. The proposed structure is composed of three radially stacked ring‐shaped permanent magnets. The improvements of stiffness and load capacity are proven in comparison to the classical passive magnetic bearing composed of two rings. A preliminary sensitivity analysis is carried out by means of the 2‐dimensional finite element method (FEM) modelling, which is used to provide the initial points for the stochastic optimisation and also to define the best fitness and penalty functions. Finally, the 2‐dimensional FEM is used to compare the force density and the cost of the proposed structure to those of the classical passive magnetic bearing composed of two rings. The optimised structure was manufactured and validated by experimental measurements. The proposed passive magnetic bearing exerts greater axial force and stiffness than similar structures.

An axial passive magnetic bearing using three PM rings / Marignetti, Fabrizio; Alizadehtir, Milad; Mirimani, Seyyed Mehdi. - In: IET ELECTRIC POWER APPLICATIONS. - ISSN 1751-8660. - 15:4(2021), pp. 415-428. [10.1049/elp2.12030]

An axial passive magnetic bearing using three PM rings

AlizadehTir, Milad;
2021

Abstract

The results of numerical and experimental analysis of passive magnetic bearings are presented. The proposed structure is composed of three radially stacked ring‐shaped permanent magnets. The improvements of stiffness and load capacity are proven in comparison to the classical passive magnetic bearing composed of two rings. A preliminary sensitivity analysis is carried out by means of the 2‐dimensional finite element method (FEM) modelling, which is used to provide the initial points for the stochastic optimisation and also to define the best fitness and penalty functions. Finally, the 2‐dimensional FEM is used to compare the force density and the cost of the proposed structure to those of the classical passive magnetic bearing composed of two rings. The optimised structure was manufactured and validated by experimental measurements. The proposed passive magnetic bearing exerts greater axial force and stiffness than similar structures.
2021
15
4
415
428
An axial passive magnetic bearing using three PM rings / Marignetti, Fabrizio; Alizadehtir, Milad; Mirimani, Seyyed Mehdi. - In: IET ELECTRIC POWER APPLICATIONS. - ISSN 1751-8660. - 15:4(2021), pp. 415-428. [10.1049/elp2.12030]
Marignetti, Fabrizio; Alizadehtir, Milad; Mirimani, Seyyed Mehdi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1264654
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