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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2012-10-01
Analysis of Axially Magnetized Permanent Magnet Bearing Characteristics
By
Siddappa Iranna Bekinal,

    Dr. Siddappa Iranna Bekinal

    Department of Mechanical and Industrial Engineering

    Manipal Institute of Technology

    India

    Homepage

Anil Tumkur Ramakrishna,

    Dr. Anil Tumkur Ramakrishna

    Department of Mechanical Engineering

    Gogte Institute of Technology

    India

    Homepage

Soumendu Jana

    Dr. Soumendu Jana

    Propulsion Division

    National Aerospace Laboratories

    India

    Homepage

Progress In Electromagnetics Research B, Vol. 44, 327-343, 2012
doi:10.2528/PIERB12080910 | Google Scholar

Abstract
The use of permanent magnets as bearings has gained attention of researchers nowadays. The characteristics of forces and moments have to be analysed thoroughly for the proper design of permanent magnet bearings. This paper presents a mathematical model of an axially magnetized permanent magnet bearing (ring magnets) using Coulombian model and a vector approach to estimate the force, moment and stiffness. A MATLAB code is developed for evaluating the parameters. Furthermore, it is extended to analyse stacked ring magnets with alternate axial polarization. The proposed model is validated with the available literature. Comparison of force and stiffness results of the present model with the results of three dimensional (3D) finite element analysis using ANSYS shows good agreement. Finally, the cross coupled stiffness values in addition to the principal stiffness values are presented for elementary structures and also for stacked structures with three ring permanent magnets.
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Citation
Siddappa Iranna Bekinal, Anil Tumkur Ramakrishna, and Soumendu Jana, "Analysis of Axially Magnetized Permanent Magnet Bearing Characteristics," Progress In Electromagnetics Research B, Vol. 44, 327-343, 2012.
doi:10.2528/PIERB12080910
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