TY - GEN
T1 - Contact resistance characteristics of high temperature superconducting Bulk- III
AU - Imaizumi, Takuya
AU - Yamamoto, Naoki
AU - Tomita, Masaru
AU - Sakai, Naomichi
AU - Murakami, Masato
AU - Hirabayashi, Izumi
AU - Sawa, Koichiro
PY - 2004/12/1
Y1 - 2004/12/1
N2 - A persistent current switch (PCS) is used for superconducting applications, such as superconducting magnetic energy storage (SMES) system. We have proposed a mechanical switch of high-temperature superconductor (HTS) as a mechanical PCS. In the previous paper, the sample surfaces were carefully polished and deposited with metals. As a result, the transfer current exceeded 30A, and the contact resistance reduced to 6μΩ at constant load 500N. In this paper, the experiment result when depositing metal thickly, and the relation between contact resistance and load were reported. Reduction of contact resistance and load was tried by depositing metals. Consequently, contact resistance was able to be reduced. When depositing indium, the increase of contact resistance by load reduction was able to be suppressed. Additionally, based on the experimental results and surface observation, we analyzed the current density and temperature distribution of the switch with finite element method (FEM). This analysis result may lead to the elucidation of a contact mechanism.
AB - A persistent current switch (PCS) is used for superconducting applications, such as superconducting magnetic energy storage (SMES) system. We have proposed a mechanical switch of high-temperature superconductor (HTS) as a mechanical PCS. In the previous paper, the sample surfaces were carefully polished and deposited with metals. As a result, the transfer current exceeded 30A, and the contact resistance reduced to 6μΩ at constant load 500N. In this paper, the experiment result when depositing metal thickly, and the relation between contact resistance and load were reported. Reduction of contact resistance and load was tried by depositing metals. Consequently, contact resistance was able to be reduced. When depositing indium, the increase of contact resistance by load reduction was able to be suppressed. Additionally, based on the experimental results and surface observation, we analyzed the current density and temperature distribution of the switch with finite element method (FEM). This analysis result may lead to the elucidation of a contact mechanism.
KW - Contact resistance
KW - High -Temperature superconductor
KW - Persistent current switch
KW - Transfer current
KW - YBCO
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M3 - Conference contribution
AN - SCOPUS:16344395534
SN - 0780384601
T3 - Proceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contacts
SP - 416
EP - 420
BT - Proceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contacts
T2 - Proceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contacts
Y2 - 20 September 2004 through 23 September 2004
ER -