A new improved method for computation of radial stiffness of permanent magnet bearings

Author

Marinescu, Marlene ; Marinescu, Nicolae

Author_Institution

MAGTECH, Frankfurt am Main, Germany

Volume

30

Issue

5

fYear

1994

fDate

9/1/1994 12:00:00 AM

Firstpage

3491

Lastpage

3494

Abstract

The new method for the computation of the radial stiffness is based on the perturbative treatment of the deviation from the cylindrical symmetry of the magnetic field due to the small displacements of the rotor. It turns out that the partial differential equations of the vector potential are 2D and can be easily solved by means of appropriately adapted FEM programs. The present method is more general than the exact Coulomb integral method which can be applied only for force calculation in bearings without iron parts and is more exact and needs less computation effort than the method based on Cartesian development of the system

Keywords

finite element analysis; magnetic devices; magnetic flux; partial differential equations; permanent magnets; perturbation techniques; rotors; FEM programs; cylindrical symmetry; magnetic field; partial differential equations; permanent magnet bearings; perturbative treatment; radial stiffness; rotor displacements; vector potential; Distributed computing; Eddy currents; Geometry; Iron; Magnetic analysis; Magnetic fields; Magnetic flux; Magnetic levitation; Partial differential equations; Permanent magnets;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312691

Filename

312691