MATHEMATICAL MODELING SUSPENSION SYSTEM OF A SYNCRONOUS RELUCTANCE MOTOR ROTOR WITH ACTIVE MAGNETIC BEARING

The article is devoted to the determination of the forces and moments generated by a magnetic field of a 2-pole synchronous jet electric motor. By analyzing the magnetic potentials of the rotor caused by the asymmetric flow distribution during rotor movements, magnetic fluxes and inductances were determined. Knowing the inductance, magnetic energy was obtained, the partial derivatives of which give torque and radial forces. An equation of torque is obtained, consisting of a disturbing and moving moment, the equations of which are presented for the motor and generator modes. It is shown that the obtained analytical expressions for radial forces and angular momenta contain perturbing and positional components that have «negative» stiffness and have a destabilizing effect on the rotor suspension. In this regard, they are taken into account in the mathematical description of the control object of the rotor magnetic suspension system using active magnetic bearings.

Authors: Yu. N. Zhuravlev, M. E. Lazarev, R. K. Sharapov

Direction: Electrical Engineering

Keywords: Active magnetic bearing, magnetic forces and moments, synchronous reluctance electric motor

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