Advanced design approach to the high temperature superconducting magnet Original Research Article

The value of critical current (Ic) in high temperature superconductor (HTS) tape has a great influence on vertical field (B⊥). Therefore, in the shape design of HTS magnet, a method to reduce the B⊥ should be considered in order to maintain the stability and substantial improvement on the performance. This paper presents the advanced racetrack HTS magnet which is used as field coil in the high temperature superconducting generator (HTSG) and the results of the approach are compared with Ic of the initial design magnet. On the basis of the magnetic field analysis using Biot–Savartʹs law and 2-dimensional finite element analysis (2D FEA), this study is focused on the function of iron plates, which is to obtain smaller B⊥, and they are applied to both initial and optimized magnets. Moreover, the design approach is verified by comparison with those experimental results.