Study effect of the back irons in passive magnetic bearings with alternating radially magnetized rings by using 2D analytical method
ISSN: 0332-1649
Article publication date: 24 July 2019
Issue publication date: 15 November 2019
Abstract
Purpose
Permanent magnet passive magnetic bearings (PMBs) are used for suspension of rotating shafts in one direction. PMBs with alternating radially magnetized rings having back iron is one of the most optimum configurations among all configurations of PMBs. This paper aims to investigate the effect of the conductivity and permeability of these back irons on the stiffness and damping of the configuration.
Design/methodology/approach
The stiffness and damping of the configuration will be calculated through a 2D dynamic analytical method and validated by FEM simulations.
Findings
The results of the paper show how the permeability and conductivity of the back irons can affect stiffness and damping of PMB. Furthermore, the size of the magnets and the air intervals between them are optimized for maximum stiffness and damping.
Originality/value
The results show that these bearings can have some intrinsic damping without any loss of stiffness, which can be useful for many applications.
Keywords
Citation
Safaeian, R. and Heydari, H. (2019), "Study effect of the back irons in passive magnetic bearings with alternating radially magnetized rings by using 2D analytical method", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 38 No. 6, pp. 1972-1985. https://doi.org/10.1108/COMPEL-12-2018-0557
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited