Design, Performance Analysis, and Testing of Composite Components for the Oil-Cooling Air-Core Stator of a High Temperature Superconducting Motor

To form the stator slots and isolate the stator and rotor, composite components for the oil-cooling air-core stator of a high temperature superconducting motor (HTSM) were designed based on a process that could be summarized as follows. First, the computational fluid dynamics analysis of the oil-cooling air-core stator was conducted. From the results, the load of temperature and oil pressure that apply on the composite cylinder were chosen to be 50 °C and 0.1 MPa, respectively. Second, the structure of the composite components was designed according to the forming technology, and the performance of that was obtained from the finite element method. The results show that the composite teeth were chosen to be a combination of GFRP block and 1Cr18Ni9Ti sheet. And the stresses of the composite cylinder with the thickness of 11 mm in all directions were lower and without buckling at 0.1 MPa. Third, the full-scale composite cylinder was designed and manufactured, and a full-scale simplified performance test platform was also developed to verify the strength of the cylinder. The test results show that the maximum strain of measuring point on the cylinder under 0.1 MPa is 325.1 $\mu \varepsilon $ , which meets the design requirements of the HTSM.