Affiliations: [a] Department of Mechanical Engineering, Gogte Institute
of Technology, Belgaum, Karnataka, India | [b] Propulsion Division, National Aerospace Laboratories,
Bangalore, Karnataka, India
Correspondence:
[*]
Corresponding author: Siddappa Iranna Bekinal, Department of
Mechanical Engineering, Gogte Institute of Technology, Belgaum 590008,
Karnataka, India. Tel.: +91 948 200 0061; Fax: +91 831 244 1909; E-mail:
sibekinal@git.edu
Abstract: This paper presents a simple mathematical model to determine the
three dimensional (3D) magnetic field components in Permanent Magnet (PM)
bearings made of ring magnets with axial, radial and perpendicular
polarizations. MATLAB codes are written to evaluate the magnetic field
components using Coulombian model and simple vector approach. In addition, the
effect of axial, radial and angular displacements (five degrees of freedom) of
the rotor magnet ring on the magnetic field created by the ring magnets in PM
bearings is presented. Finally, the effect of movement of the outer ring magnet
on the magnetic field created by two rings in the air gap is discussed.
Keywords: Angular displacement, Coulombian model, magnetic field components, vector approach, permanent magnet
