Research on Superconducting Rotor Drive Method with Integrated Driving and alignment

The high-speed rotating superconducting rotor can be used as high-precision inertial devices to measure the angular position or angular velocity of the carrier. The mass eccentricity and spherical error of the superconducting rotor are the main error sources that affect the measurement accuracy. The more complex the structure of superconducting rotor, the greater the mass eccentricity and spherical error caused by its production and assembly process, and the lower the accuracy of its measurement of angular velocity. Based on this, this article designs a electromagnetic drive structure with a simple rotor structure. And the torque generated by the stator on the superconducting rotor was studied through finite element method (FEM). The effect of stator on vertical alignment and acceleration of the superconducting rotor was analyzed. Based on the research results of superconducting rotor torque, a superconducting rotor drive method with integrated driving and alignment drive is proposed, which achieves the driving and alignment functions simultaneously through the stator coil, and corresponding stator control timing is designed. Finally, the torque distribution during the driving process of the proposed driving method was analyzed, and the driving effect was quantitatively analyzed based on the response characteristics of the stator system. The time for the superconducting rotor to accelerate to 50Hz under different conditions was calculated. The results indicated that the designed driving electromagnetic structure and the proposed integrated driving method of alignment and driving can be used for the vertical alignment and driving of superconducting rotor. The research results provide reference for further optimizing the superconducting rotor structure and driving methods of superconducting rotors.