Thermal and structural design optimization of the rotor support in high-speed superconducting motors

Electric motors, as the core of modern electric propulsion platforms, face increasing demands for high power density and lightweight designs. Conventional electric motors, relying on copper windings and iron cores, encounter significant limitations in meeting these requirements, particularly in applications such as aircraft and heavy-duty vehicles. High-temperature superconducting (HTS) tapes, characterized by their superior current-carrying capacity under critical conditions, offer a promising alternative. Motors incorporating HTS tapes demonstrate exceptional power-to-weight ratios, driving extensive research into replacing conventional motors. However, for mobility applications, HTS motors require optimized support structures designed to meet weight constraints. Unlike static applications of HTS coils, the support structure for a rotating superconducting rotor must ensure torque transmission and maintain cryogenic conditions while addressing both structural and thermal factors. This study focuses on the optimized design of the support structure for a superconducting rotor equipped with HTS coils. The proposed design is evaluated through finite element method (FEM) analysis, verifying its mechanical and thermal performance under operational conditions.