Analytical method for eddy current loss in laminated rotors with magnetic bearings

Author

Sun, Yanhua ; Yu, Lie

Author_Institution

Theor. of Lubrication & Bearing Inst., Xi´´an Jiaotong Univ., China

Volume

38

Issue

2

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

1341

Lastpage

1347

Abstract

This paper presents a totally analytical method to calculate the eddy current loss in a laminated rotor. First, the method derives the analytical field solutions both in the lamination and the air gap with average boundary conditions at the surface of the rotor. The magnetic field can then be determined from the static flux distribution around the pole surface. Then, the method obtains the eddy current induced in the lamination from the field solution in the lamination. Finally, it calculates the rotation loss by integrating resistive power loss over the volume of the lamination and summed in all sheets. The results show good agreement with experimentally measured losses

Keywords

eddy current losses; laminations; magnetic bearings; magnetic fields; magnetic flux; rotors; stators; air gap; analytical field solutions; analytical method; average boundary conditions; eddy current loss; induced eddy current; laminated rotors; lamination; lamination sheets; lamination volume; magnetic bearings; magnetic field; pole surface; resistive power loss integration; rotation loss; rotor surface; static flux distribution; stators; Boundary conditions; Conductivity; Eddy currents; Lamination; Loss measurement; Magnetic analysis; Magnetic fields; Magnetic levitation; Stators; Sun;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.996021

Filename

996021