MODELLING THE DYNAMICS OF A RIGID ROTOR IN ACTIVE MAGNETIC BEARINGS
The paper deals with developing a mathematical model of a rigid rotor in active radial and axial electromagnetic bearings.
A feature of the suggested technique of mathematical description of rotor dynamic behaviour is accounting for the nonlinear relationship of mechanical and electromagnetic processes in the system. The magnetic conductance of gaps under the poles of the electromagnets is defined with account of the mutual impact of radial and axial rotor displacement.
The analytical model described can be used as a basis of the simulation computer model for alternative dynamic stability calculations to select effective suspension parameters and control actions for different design options.