CUED Publications database

A fast AC field controlled impedance in HTS coated conductors: response speed and electric field value

Geng, J and Li, C and Coombs, TA (2017) A fast AC field controlled impedance in HTS coated conductors: response speed and electric field value. IEEE Transactions on Applied Superconductivity. ISSN 1051-8223

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Abstract

IEEE Direct current carrying Type II superconductors present a DC electric field under external perpendicular AC magnetic field. This effect can also be considered as an equivalent dynamic resistance. The minimum field magnitude required to generate the dynamic resistance is less than the fully penetration field of the superconductor, which is much less than its upper critical field. Thus the superconductor can remain superconducting, leading to fast recovery times and meaning that it is feasible to use dynamic resistance to add a controlled impedance into the system. In this work, we built a demonstrator using a section of YBCO coated conductor controlled by an external AC field of a wide frequency range. We tested the electric field limit and response time of the system. The work may be indicative for designing impedances for flux pumps or SMES systems.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 25 Jul 2017 03:53
Last Modified: 19 Sep 2017 01:33
DOI: