Title :
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
fDate :
9/1/1994 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
