Patent ID: 8294314

Claim:
A method of controlling a magnetic bearing with a three-phase converter which has a proportional current regulator regulating a d-current and a g-current of the converter, the method comprising: applying all three phase currents of the converter to control the magnetic bearing, generating with the converter from the three phase currents a constant current and a difference current, controlling a pair of magnet coils of the magnetic bearing with the constant current and the difference current, wherein the pair of magnet coils includes an upper magnet armature and a lower magnet armature, connecting a control field winding of upper magnet armature to a first phase current output and to a third phase current output of the three-phase converter, and connecting a control field winding of the lower magnet armature to the first phase current output and to a second phase current output of the three-phase converter, and setting a ratio of a gain of a first proportional amplifier regulating the d-current to a gain of a second proportional amplifier regulating the g-current in a range from 1:2 to 1:4.