Design and Strength Analysis of Ultra-High Speed Permanent Magnet DC Rotor

J.C. Xiao; S.H. Xiao; H. Wu

doi:10.4028/www.scientific.net/AMR.188.481

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 188Design and Strength Analysis of Ultra-High Speed...

Design and Strength Analysis of Ultra-High Speed Permanent Magnet DC Rotor

Abstract:

The sintered neodymium-iron-boron (Nd-Fe-B) material is used in most of PM machines. The kind of PM materials has small tensile strength and cannot withstand large centrifugal force due to high rotational velocity. A nonmagnetic steel enclosure is needed to cover the PM material. The tensile stress of the PM can reduced by pre-pressure applied to the outer surface of the PM through shrink-fitting into the enclosure. Based on the elasticity theory and the elastic-plastic contact theory, in soft ANSYS it is feasibility to establish a finite element mechanical model of interference fit between the enclosure and motor rotor PM at high rotating speed. This paper simulates the effects of the temperature and rotating speed (centrifugal force) on the displacement and the contact pressure on the interference-fitting surfaces .By finite element non-linear contact model analysis, if setting up right fit clearance, this paper could ensure the security of the PM rotor under rotational velocity up to 300,000 r/min high and temperature up to 150°C.

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Periodical:

Advanced Materials Research (Volume 188)

Pages:

481-486

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.188.481

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Online since:

March 2011

Authors:

J.C. Xiao, S.H. Xiao, H. Wu

Keywords:

ANSYS, Interference Fit, Permanent Magnet Motor, Ultra-High Speed Spindle

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