Abstract
It is very important to clarify characteristics of trapped field in HTS bulk exposed to an external AC magnetic field in application of high-temperature superconducting bulk to motors, magnetic levitation systems, bulk magnets and so on. We have experimentally investigated the transition of trapped field while applying external AC magnetic field to a disk-shaped YBCO bulk. The observed trapped-field attenuation is different from that by flux creep, i.e., zero external field. It may be considered that the trapped-field attenuation is affected by external AC magnetic field, particularly temperature rise due to AC loss. In this paper, electromagnetic behaviors within the bulk exposed to external AC magnetic field, especially supercurrent distribution, are investigated numerically using a simulation code based on the finite element method (FEM) considering voltage-current (E-J) characteristic. We focus on the relationship between the transition of supercurrent distribution within the bulk while applying external AC magnetic field and both n-value of E-J characteristic and temperature rise by AC loss.
| Original language | English |
|---|---|
| Pages (from-to) | 820-823 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 12 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Mar 2002 |
| Externally published | Yes |
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Keywords
- AC loss
- External AC magnetic field
- FEM
- n-value
- Trapped field attenuation
- YBCO bulk
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Physics and Astronomy (miscellaneous)
Cite this
Trapped field characteristics of Y-Ba-Cu-O bulk in time-varying external magnetic field. / Shimizu, Hidehito; Ueda, Hiroshi; Tsuda, Makoto; Ishiyama, Atsushi.
In: IEEE Transactions on Applied Superconductivity, Vol. 12, No. 1, 03.2002, p. 820-823.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Trapped field characteristics of Y-Ba-Cu-O bulk in time-varying external magnetic field
AU - Shimizu, Hidehito
AU - Ueda, Hiroshi
AU - Tsuda, Makoto
AU - Ishiyama, Atsushi
PY - 2002/3
Y1 - 2002/3
N2 - It is very important to clarify characteristics of trapped field in HTS bulk exposed to an external AC magnetic field in application of high-temperature superconducting bulk to motors, magnetic levitation systems, bulk magnets and so on. We have experimentally investigated the transition of trapped field while applying external AC magnetic field to a disk-shaped YBCO bulk. The observed trapped-field attenuation is different from that by flux creep, i.e., zero external field. It may be considered that the trapped-field attenuation is affected by external AC magnetic field, particularly temperature rise due to AC loss. In this paper, electromagnetic behaviors within the bulk exposed to external AC magnetic field, especially supercurrent distribution, are investigated numerically using a simulation code based on the finite element method (FEM) considering voltage-current (E-J) characteristic. We focus on the relationship between the transition of supercurrent distribution within the bulk while applying external AC magnetic field and both n-value of E-J characteristic and temperature rise by AC loss.
AB - It is very important to clarify characteristics of trapped field in HTS bulk exposed to an external AC magnetic field in application of high-temperature superconducting bulk to motors, magnetic levitation systems, bulk magnets and so on. We have experimentally investigated the transition of trapped field while applying external AC magnetic field to a disk-shaped YBCO bulk. The observed trapped-field attenuation is different from that by flux creep, i.e., zero external field. It may be considered that the trapped-field attenuation is affected by external AC magnetic field, particularly temperature rise due to AC loss. In this paper, electromagnetic behaviors within the bulk exposed to external AC magnetic field, especially supercurrent distribution, are investigated numerically using a simulation code based on the finite element method (FEM) considering voltage-current (E-J) characteristic. We focus on the relationship between the transition of supercurrent distribution within the bulk while applying external AC magnetic field and both n-value of E-J characteristic and temperature rise by AC loss.
KW - AC loss
KW - External AC magnetic field
KW - FEM
KW - n-value
KW - Trapped field attenuation
KW - YBCO bulk
UR - http://www.scopus.com/inward/record.url?scp=0036509569&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036509569&partnerID=8YFLogxK
U2 - 10.1109/TASC.2002.1018527
DO - 10.1109/TASC.2002.1018527
M3 - Article
AN - SCOPUS:0036509569
VL - 12
SP - 820
EP - 823
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 1
ER -