Abstract: A new method to implement autobalance with active magnetic bearings is presented. The effect of the rotor’s imbalance is looked as putting disturbance voltage vectors into power amplifiers. The compensation voltage vectors with proper amplitudes and phases are put into the power amplifiers to cancel out the effect of the rotor’s imbalance, thus the rotor rotates around the principle axis of inertin. Experiments show that this method is very effective.

Key words: Auenuation of unbalance vibration, Active magnetic bearings, Autobalancing