Patent ID: 7135798

Claim:
A magnetic suspension bearing for use on a rotational device which consists of a stator, a spindle and a base dock for holding the stator, the spindle being rotationably coupled with the stator through the magnetic suspension bearing, the magnetic suspension comprising: two magnetic ring sets each including a stator magnetic unit abutting a top side and a bottom side of the stator and a spindle magnetic unit coupled on two ends of the spindle corresponding to the stator magnetic unit to generate repulsive magnetic forces against the stator magnetic unit and allow the spindle to space from the stator at a selected distance in normal conditions, and the magnetic center line of the spindle magnetic unit is lower than the magnetic center line of the stator magnetic unit for generating an axial prestressing force to the spindle; and a loading section located at one end of the spindle to hold the spindle and the axial prestressing force, the prestressing force causing additional friction between the spindle and the loading section to stabilize the spindle.