Experimental Study on Low-Pass Filtering Characteristic of Axial Magnetic Field of No-Insulation and Partial-Insulation HTS Coils Carrying a DC-Biased AC Current
- Authors
- Lee, Jiho; Lee, Tae Sung; Kwon, Oh Jun; Lee, Haigun; Ko, Tae Kuk
- Issue Date
- 6월-2014
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- DC-biased ac current; high temperature superconducting (HTS) coil; HTS magnet; insulation; low-pass filter; no-insulation; partial insulation
- Citation
- IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, v.24, no.3
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
- Volume
- 24
- Number
- 3
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/98397
- DOI
- 10.1109/TASC.2014.2305076
- ISSN
- 1051-8223
- Abstract
- This paper deals with the low-pass filtering characteristic of the axial magnetic field of no-insulation and partial-insulation high temperature superconducting (HTS) coils carrying a dc-biased ac current. Recently, the no-insulation winding technique has been issued as a key technique to enhance the performance of HTS coils in terms of the overall current density, thermal stability, and mechanical integrity. In this paper, to verify the effect of time-varying external distortion on no-insulation HTS coils, an experimental analysis is carried on three HTS coils-insulation, no-insulation, and partial-insulation coils. To simulate the environment in which time-varying external distortion influences the HTS coils, a dc-biased ac current is carried by the HTS coils. The axial magnetic fields of no-insulation, partial insulation, and insulation HTS coils are experimentally tested and analyzed. When the coils carry a dc-biased ac current, the no-insulation and partial-insulation coils have a tendency to attenuate the high-frequency components and to act as a low-pass filter on the axial magnetic field; however, the insulation coil does not attenuate the high-frequency components of the axial magnetic field. The analysis of the experimental results can be useful data for the adoption of no-insulation and partial-insulation windings in superconducting applications.
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