Active magnetic bearings (AMBs) represent a smart solution for supporting rotors, that has a lot of advantages. Their application is limited to special fields where the advantages justify higher effort in development and hence higher costs. AMBs can generate a great benefit particularly in the field of high speed applications. An unbalance in the case of a overcritical operating rotor effects forces in the bearings and a deformation of the rotor especially in the frequency ranges of its flexible modes. To minimize these negative effects, the rotor must be balanced, which is extremely time-consuming. Several stops are necessary for adding weights to identify the system behavior. Active balancing devices (ABDs) are fitted to the rotor to reduce the effort. They work without contact and allow adjustment of the balancing state of the rotor during operation. To detect the effects of unbalance the AMB embedded tool unbalance compensation can be used. The motivation of this work is to emphasize the advantages, which are reached by the combination of AMBs and ABDs.
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