Design of bi-2223/Ag coil based on genetic algorithm and finite element method

We designed Bi-2223/Ag coils based on genetic algorithm and finite element method. The winding geometry as well as the operating current of the coil was optimized for the minimization of its loss, on condition that its operating temperature, stored energy and total length of the conductor were constant. The loss was calculated with the use of the analytical expressions that could quantitatively describe the current transport characteristics in high T_c superconductor including their magnetic anisotropy and temperature dependence. Some optimized results were shown and discussed in this paper.