Analysis on self-and-mutual-inductances of magnets stacked by HTS gourd loops
High temperature superconducting(HTS)magnet with gourd-shaped loops stacked structure utilizing fieldcool-ing(FC)excitation is equipped with closed-loop operation.In order to accurately calculate the self-inductance and mutual-inductances of the stacked gourd-shaped HTS loops,an analytical equation was derived for the inductance applicable to the gourd-shaped loops with uneven current distribution and the experiments were carried out on the vertical magnetic field distribu-tion and radial current density distribution of the gourd-shaped loop at the temperature of liquid nitrogen.The calculated values were compared with the inductance ones obtained by the finite element method,and the error was within 2％.The results show that the analytical method can accurately calculate the inductance of gourd-shaped loops and can be generalized to the calcula-tion of the inductance of larger width/height ratios for this model.
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