APPARATUS TO COMPENSATE ROTOR POSITION ERROR CAUSED BY UNBALANCE IN ROTOR SYSTEMS USING ELECTROMAGNETIC BEARING

摘要

PURPOSE: An apparatus compensating rotor position error caused by unbalance in a rotor using an electromagnetic bearing is provided to minimize the amount of electrical energy consumption used in a magnetic bearing by controlling the position error of rest components except for position error by the unbalance of the rotor among the whole position error. CONSTITUTION: An apparatus compensating rotor position error caused by unbalance in a rotor using an electromagnetic bearing comprises following steps. An r(k) signal which is home location of the X,Y direction of the rotor, Ex(k), Ey(k) signals which are position error of the X-Y direction, and Eux(k), Euy(k) signals which are position error of the X-Y direction caused by the unbalance of the rotor are inputted by sensors formed in the X-Y direction of the magnetic bearing. An u_fd(k) signal which is a feedback control signal is outputted by removing the Eux(k) signal in the Ex(k) signal and the Euy(k) signal in the Ey(k) signal. The fe(k) signal and the u_fd(k) signal are inputted. A y(k) signal which is position output is outputted and the rotational center position of the rotor is compensated through the magnetic bearing.