Patent ID: 7038341

Claim:
A magnetic suspension bearing with damping system, comprising: a stator having an internal portion and an external portion, and a stator magnetic unit mounted on the internal portion of the stator, the stator magnetic unit being provided at the top side of the stator, and the stator further including a sub stator magnetic unit located on the bottom side of the stator; a rotor rotatably located at the internal portion of the stator, including a rotor magnetic unit corresponding to the stator magnetic unit and a yoke coupling with an one end of the rotor, and the yoke having a magnetic driving unit corresponding to the external portion of the stator, the rotor further having a sub rotor magnetic unit, corresponding to the sub stator magnetic unit, located on the bottom side of the rotor; and a magnetic damping device located below the magnetic driving unit having a magnetic unit and an elastic unit; wherein the magnetic unit corresponding to the magnetic driving unit to generate magnetic force between them, and the elastic unit coupled below the magnetic unit to reduce the vibration of the magnetic unit, wherein the sub stator magnetic unit and the sub rotor magnetic unit separately have a magnetic center line, and the magnetic center line of the sub rotor magnetic unit is lower than the magnetic center line of the sub stator magnetic unit for generating an axial prestressing force to the rotor.