Patent ID: 6806605
Filing Date: 2004-10-19
Classification: F16C,H02K

Abstract:
A magnetic bearing system for support of a rotating body having a center of mass about a substantially vertical axis of rotation through said center of mass, said bearing system comprised of a rotating portion and a stationary portion on each axial side of said center of mass;said rotating portions include of two or more concentric axially magnetized ring poles on an axial surface of the rotating body and arranged with radially alternating magnetic polarities; said rotating ring poles are constructed of multiple, circumferentially-adjacent, individual permanent magnet pieces; said rotating magnet pieces number at least four and are contained inside a containment cup having a rim and a web, and are axially held in said cup by magnetic attraction to said web and are radially supported by said rim; said stationary portions are comprised of two or more concentric axially magnetized poles of permanent magnet material that cooperate with said rotating ring magnets to produce both an axial attractive force and a radial centering force.