Specification :

-Description
Faces of bearing are kept separate by magnets ( electromagnets or eddy currents)
-Friction
Zero friction at zero speed, but constant power for levitation, eddy currents are often induced when movement occurs, but may be negligible if magnetic field is quasi-static
-Stiffness
Low
-Speed
No practical limit
-Life
Indefinite. Maintenance free. ( with electromagnets)
-Cautions
Active magnetic bearings ( AMB) need considerable power. Electrodynamic bearings ( EDB) do not require external power.