Journal
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Volume 29, Issue 5, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TASC.2019.2897868
Keywords
High-temperature superconductors; inductance; superconducting coils
Funding
- National Natural Science Foundation of China [51877119, 51477088]
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Inductance is a very commonly used electrical parameter in transient progress analysis, as well as in energy storage evaluations. It was normally considered as constant when the geometrical configuration of a coil is determined. However, experiments on Bi-2223 (Bi2Sr2Ca2Cu3O10+x) and YBCO (YBa2Cu4O7-x) coils, both show 10% rise inductance while increasing the applied current. The inductance grows approximately a linear relationship from its minimum to maximum. We used both theoretical and experimental analysis to deeply understand the mechanism of the variation in terms of current distribution in high-temperature superconducting (HTS) coils. Taking this inductance change into account would benefit the accuracy in energy storage applications and in transient analysis occasions. Besides, inductance controllable devices could be achieved by manipulating the bias current applied on HTS coils.
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