Study on Vertical Alignment Method of Superconducting Rotor's Polar Axis

The high-speed rotating superconducting rotor can be made into inertial devices to measure the angular velocity of the carrier. The angle between the polar axis of the spinning spherical superconducting rotor and the vertical axis of the superconducting magnetic bearing (SMB) directly affects the drift speed of the spinning superconducting rotor's polar axis. The greater the drift speed of the superconducting rotor's polar axis, the worse the accuracy of the inertial device made of the superconducting rotor. The electromagnetic properties of the superconducting rotor magnetic levitation structure are studied to reduce the angle between the superconducting rotor's polar axis and the vertical axis of the SMB by applying Meissner torque to the superconducting rotor. The finite element model of magnetic levitation superconducting rotor based on magnetic vector potential equation is established. According to the established finite element model, the magnetic field and magnetic torque produced by a torque coil pair are investigated. And then we proposed a method to reduce the angle between the spinning superconducting rotor's polar axis and the vertical axis of the SMB by controlling the energization of torque coil pairs. Finally, the vertical alignment process of the superconducting rotor polar axis was studied, and the research results provide a reference for the alignment of the superconducting rotor polar axis.