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Description
The torque tube is crucial for the normal operation of high-temperature superconducting motors, serving as a mechanical support and torque transmission element. Including adiabatic performance, cold shrinkage performance and mechanical stress, the performances of torque tube are important indicators in superconducting electrical design, which need to be analyzed and studied comprehensively. The conventional structures of torque tube suffer from the problems of large contact areas and short heat transfer paths, leading to serious heat leakage from the superconducting coils. Therefore, it is necessary to design the torque tube reasonably to reduce the heat leakage without increasing the volume of the motor rotor and satisfying the rotor support capacity.
In this paper, a novel radial structure of torque tube that enables good mechanical stress and low heat leakage is proposed. By comparing the performances of different torque tube structures with the same dimensions, the proposed structure possesses the advantages of exhibit smaller thermal leakage and transmitting high torque, which meets the design requirements for high temperature superconducting motor. Moreover, this study provides a comprehensive analysis of the tradeoffs between heat leakage and mechanical stress in the torque tube, offering valuable insights for optimizing its design.
