Passively stabilized magnetic bearings

Author

Musolino, Antonino ; Rizzo, Rocco

Author_Institution

Dept. of Electr. Syst. & Autom., Univ. of Pisa, Pisa, Italy

fYear

2010

fDate

9-12 May 2010

Firstpage

1

Lastpage

1

Abstract

This paper presents a new passive magnetic bearing system that is capable to rotate without contact at a short distance from a dedicated stator. The magnetic suspension is assured by the repulsion between two arrangements of permanent magnets located both on toroidal shaped stator and rotor. The stator magnets are surrounded by a conductive sheet. The presence of eddy currents due to the relative motion between the rotor magnets and the conductive sheet allows overcoming the intrinsic instability of the system. The dependence of the stabilizing force on the angular velocity will be determined as well as the levitation force, the magnetic drag force and the power dissipated in the conductor sheet by the stabilizing eddy currents.

Keywords

magnetic levitation; permanent magnets; rotors; stators; suspensions (mechanical components); conductive sheet; levitation force; magnetic drag force; magnetic suspension; passive magnetic bearing system; passively stabilized magnetic bearings; permanent magnets; rotor magnets; stator magnets; Conducting materials; Eddy currents; Magnetic levitation; Magnetic materials; Permanent magnets; Rotors; Sheet materials; Stators; Superconducting magnets; Toroidal magnetic fields;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Field Computation (CEFC), 2010 14th Biennial IEEE Conference on

Conference_Location

Chicago, IL

Print_ISBN

978-1-4244-7059-4

Type

conf

DOI

10.1109/CEFC.2010.5481398

Filename

5481398