Concept Design of a Superconducting Impulse Transformer Using YBCO Tapes
Impulse transformers are widely used in high-frequency signal transportation, high voltage, and current impulse generation. Nowadays, with the increase of the design capacity, disadvantages of impulse transformers using normal electrical materials become more obvious. In order to solve this problem, superconducting tapes are investigated into the design and fabrication of impulse transformers. First, this paper presents the design and performance test of a normal air-core impulse transformer. The design process of this transformer is carried out by theoretical calculation and circuit-field coupled method. Then, performance tests of this transformer under both room temperature and liquid nitrogen temperature are carried out, to verify the validity of this design method, as well as explore the influence of the system parameters. Finally, on the basis of this, the concept design of a 5-kA superconducting impulse transformer is presented, and the performance of the superconducting transformer is obtained by the numerical methods.