Synchronous Disturbance Suppression in Bearingless Machines with Active Disturbance Rejection Controller

Active Disturbance Rejection Controllers have a robust operation when applied to the control of systems with uncertainties, nonlinearities, and in the presence of disturbances. This work studies the Active Disturbance Rejection Control (ADRC) theory with an observer structure improved by the addition of a Generalized Integrator (GI) to be applied on the position control of a bearingless machine with a split winding that suffers from the action of synchronous disturbances. The results compared an ADRC controller operation with traditional Extended State Observer (ESO) and with a Generalized Integrator Extended State Observer (GIESO) and showed that the last structure can increase the ESO ability to compensate synchronous disturbances in bearingless machines.