Electromagnetic and Stress Analysis of 50 kA Superconducting Transformer for ITER Conductor Test Facility

摘要

A superconducting transformer was designed for the correction coils (CC) conductor test facility in the Institute of Plasma Physics, the Chinese Academy of Sciences (ASIPP), for validating the CC conductor of the international thermonuclear experimental reactor (ITER). The maximum current of the superconducting transformer is 50 kA. The conductor samples could be tested at different magnetic fields and cooling conditions similar to the operational condition of ITER. During normal operation, the primary and secondary windings of the superconducting transformer will withstand the high electromagnetic (EM) stress caused by the high current. Integrated analysis of EM and structural fields can ensure these components not to encounter any over-stress problem under normal operational condition. A coupled model is proposed to combine the EM and structural analyses. A detailed finite element (FE) model and EM-structural coupled model are presented and the numerical results show that the stress of the transformer windings is within the allowable limits.