Increasing the bandwidth of axial AMB for the high-speed system

Abstract

Active magnetic bearings are increasingly presented as a new alternative to conventional bearings, especially where the latter can no longer be used, as they do not fully meet the newly imposed technical requirements. This is especially true for high-speed equipment, in which the rotating shaft weighing several tons rotates at a high speed. Such applications are for instance gas and steam turbines, compressors, blowers, etc. Besides, at high speeds AMB actuators require sufficient bandwidth needed to achieve desirable performance. In this thesis, the possibilities of force bandwidth improvements are studied that allow to receive the required actuator dynamic performance at high speeds. For these purposes, an analytical model for the axial actuator is created and then it is compared with a finite element model.