Title :
Passively stabilized magnetic bearings
Author :
Musolino, Antonino ; Rizzo, Rocco
Author_Institution :
Dept. of Electr. Syst. & Autom., Univ. of Pisa, Pisa, Italy
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;
Conference_Titel :
Electromagnetic Field Computation (CEFC), 2010 14th Biennial IEEE Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4244-7059-4
DOI :
10.1109/CEFC.2010.5481398
