Numerical and Experimental Investigations of HTS Coils Inductance

In this article, the inductance variation with the current in high-temperature superconducting (HTS) pancake coils is investigated numerically and experimentally. Both dc and ac modeling approaches are developed. The results show that the dc modeling approach, even though it considers the non-uniformity of the current density distribution using a power minimization criterion, is not sufficient to characterize the inductance variation, which is affected by the dynamic behavior of HTS coils. The ac modeling approach reproduces a variation of the inductance similar to the experimental results.