Abstract
We have proposed a mechanical switch of high-temperature superconductor (HTS) as a mechanical persistent current switch (PCS). Two YBCO bulks are mechanically mated and the current flows through contact. However, the contact resistance was too large to work as PCS. In previous work, we polished the contact surface in order to reduce the contact resistance; however, we were not able to reduce it easily. So, in addition to polishing the contact surface, we deposited the metals on the surface to reduce the contact resistance. Accordingly, the contact resistance can be drastically reduced. Based on the experimental results, we analyzed the temperature of the switch with Finite Element Method (FEM). The axisymmetrical three-dimensional model is used, and the temperature distribution is numerically obtained as a function of the current density. We have expected that analytical results would make a contribution to reduce the contact resistance.
| Original language | English |
|---|---|
| Pages (from-to) | 668-672 |
| Number of pages | 5 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 412-414 |
| Issue number | SPEC. ISS. |
| DOIs | |
| Publication status | Published - 2004 Oct |
Fingerprint
Keywords
- Contact resistance
- FEM
- Persistent current switch
- YBCO
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Simulation of current and temperature distribution in YBCO bulk's electrical contact. / Imaizumi, T.; Yamamoto, N.; Sawa, K.; Tomita, M.; Murakami, Masato; Hirabayashi, I.
In: Physica C: Superconductivity and its Applications, Vol. 412-414, No. SPEC. ISS., 10.2004, p. 668-672.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Simulation of current and temperature distribution in YBCO bulk's electrical contact
AU - Imaizumi, T.
AU - Yamamoto, N.
AU - Sawa, K.
AU - Tomita, M.
AU - Murakami, Masato
AU - Hirabayashi, I.
PY - 2004/10
Y1 - 2004/10
N2 - We have proposed a mechanical switch of high-temperature superconductor (HTS) as a mechanical persistent current switch (PCS). Two YBCO bulks are mechanically mated and the current flows through contact. However, the contact resistance was too large to work as PCS. In previous work, we polished the contact surface in order to reduce the contact resistance; however, we were not able to reduce it easily. So, in addition to polishing the contact surface, we deposited the metals on the surface to reduce the contact resistance. Accordingly, the contact resistance can be drastically reduced. Based on the experimental results, we analyzed the temperature of the switch with Finite Element Method (FEM). The axisymmetrical three-dimensional model is used, and the temperature distribution is numerically obtained as a function of the current density. We have expected that analytical results would make a contribution to reduce the contact resistance.
AB - We have proposed a mechanical switch of high-temperature superconductor (HTS) as a mechanical persistent current switch (PCS). Two YBCO bulks are mechanically mated and the current flows through contact. However, the contact resistance was too large to work as PCS. In previous work, we polished the contact surface in order to reduce the contact resistance; however, we were not able to reduce it easily. So, in addition to polishing the contact surface, we deposited the metals on the surface to reduce the contact resistance. Accordingly, the contact resistance can be drastically reduced. Based on the experimental results, we analyzed the temperature of the switch with Finite Element Method (FEM). The axisymmetrical three-dimensional model is used, and the temperature distribution is numerically obtained as a function of the current density. We have expected that analytical results would make a contribution to reduce the contact resistance.
KW - Contact resistance
KW - FEM
KW - Persistent current switch
KW - YBCO
UR - http://www.scopus.com/inward/record.url?scp=4644334090&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4644334090&partnerID=8YFLogxK
U2 - 10.1016/j.physc.2004.01.086
DO - 10.1016/j.physc.2004.01.086
M3 - Article
AN - SCOPUS:4644334090
VL - 412-414
SP - 668
EP - 672
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - SPEC. ISS.
ER -