Abstract
In this paper, we propose a vibration suppression mechanism for superconducting magnetic bearings. The concept of this mechanism is controlling the stiffness of the rotor axis of the magnetic bearings according to the rotation velocity of the axis. To control the stiffness we propose the position feedback system of the super conductor. The position of the superconductor is controlled based on the displacement of the rotor. The aim of the proposed method is that the rotor passes the critical speed. First, the concept of the proposed mechanism is explained. Numerical simulations verify the possibility of the function of changing the stiffness. A control method of passing the critical speed is proposed and its effectiveness is proved.
