Characteristics of persistent-current mode of HTS coil on superconducting electromagnet

C. Y. Lee; J. Kim; Y. J. Han; B. Kang; Y. D. Chung; Y. S. Yoon; S. Y. Chu; Y. J. Hwang; H. C. Jo; J. Y. Jang; T. K. Ko

doi:10.1016/j.physc.2011.05.208

Characteristics of persistent-current mode of HTS coil on superconducting electromagnet

C. Y. Lee, J. Kim, Y. J. Han, B. Kang, Y. D. Chung, Y. S. Yoon, S. Y. Chu, Y. J. Hwang, H. C. Jo, J. Y. Jang, T. K. Ko

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

This paper investigates the way in which the levitation gap of an electromagnetic suspension (EMS) system affects the current decay rate of superconducting electromagnet (SC-EM) operated in persistence-current mode (PCM). Using inductance analyzed from the magnetic circuit of an EMS model, the current decay rate caused by the variation in the levitation gap was simulated. In order to experimentally verify the simulation results, we fabricated a small-scale EMS model with SC coil operated in PCM and measured the current decay rates at different levitation gaps. The result showed that the presence of iron core provides a significant benefit in the PCM performance of SC coil, but the benefit decreased as the levitation gap increases. This study revealed that the increased levitation gap of the EMS model with the SC-EM could negatively affect the design of SC-EM operated in PCM.

Original language	English
Pages (from-to)	1424-1427
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	471
Issue number	21-22
DOIs	https://doi.org/10.1016/j.physc.2011.05.208
Publication status	Published - 2011 Nov

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2011.05.208

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@article{5a6b0bd05382409daa6547eb8385f03e,

title = "Characteristics of persistent-current mode of HTS coil on superconducting electromagnet",

abstract = "This paper investigates the way in which the levitation gap of an electromagnetic suspension (EMS) system affects the current decay rate of superconducting electromagnet (SC-EM) operated in persistence-current mode (PCM). Using inductance analyzed from the magnetic circuit of an EMS model, the current decay rate caused by the variation in the levitation gap was simulated. In order to experimentally verify the simulation results, we fabricated a small-scale EMS model with SC coil operated in PCM and measured the current decay rates at different levitation gaps. The result showed that the presence of iron core provides a significant benefit in the PCM performance of SC coil, but the benefit decreased as the levitation gap increases. This study revealed that the increased levitation gap of the EMS model with the SC-EM could negatively affect the design of SC-EM operated in PCM.",

author = "Lee, {C. Y.} and J. Kim and Han, {Y. J.} and B. Kang and Chung, {Y. D.} and Yoon, {Y. S.} and Chu, {S. Y.} and Hwang, {Y. J.} and Jo, {H. C.} and Jang, {J. Y.} and Ko, {T. K.}",

year = "2011",

month = nov,

doi = "10.1016/j.physc.2011.05.208",

language = "English",

volume = "471",

pages = "1424--1427",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "21-22",

}

TY - JOUR

T1 - Characteristics of persistent-current mode of HTS coil on superconducting electromagnet

AU - Lee, C. Y.

AU - Kim, J.

AU - Han, Y. J.

AU - Kang, B.

AU - Chung, Y. D.

AU - Yoon, Y. S.

AU - Chu, S. Y.

AU - Hwang, Y. J.

AU - Jo, H. C.

AU - Jang, J. Y.

AU - Ko, T. K.

PY - 2011/11

Y1 - 2011/11

N2 - This paper investigates the way in which the levitation gap of an electromagnetic suspension (EMS) system affects the current decay rate of superconducting electromagnet (SC-EM) operated in persistence-current mode (PCM). Using inductance analyzed from the magnetic circuit of an EMS model, the current decay rate caused by the variation in the levitation gap was simulated. In order to experimentally verify the simulation results, we fabricated a small-scale EMS model with SC coil operated in PCM and measured the current decay rates at different levitation gaps. The result showed that the presence of iron core provides a significant benefit in the PCM performance of SC coil, but the benefit decreased as the levitation gap increases. This study revealed that the increased levitation gap of the EMS model with the SC-EM could negatively affect the design of SC-EM operated in PCM.

AB - This paper investigates the way in which the levitation gap of an electromagnetic suspension (EMS) system affects the current decay rate of superconducting electromagnet (SC-EM) operated in persistence-current mode (PCM). Using inductance analyzed from the magnetic circuit of an EMS model, the current decay rate caused by the variation in the levitation gap was simulated. In order to experimentally verify the simulation results, we fabricated a small-scale EMS model with SC coil operated in PCM and measured the current decay rates at different levitation gaps. The result showed that the presence of iron core provides a significant benefit in the PCM performance of SC coil, but the benefit decreased as the levitation gap increases. This study revealed that the increased levitation gap of the EMS model with the SC-EM could negatively affect the design of SC-EM operated in PCM.

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U2 - 10.1016/j.physc.2011.05.208

DO - 10.1016/j.physc.2011.05.208

M3 - Article

AN - SCOPUS:80055005994

SN - 0921-4534

VL - 471

SP - 1424

EP - 1427

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 21-22

ER -

Characteristics of persistent-current mode of HTS coil on superconducting electromagnet

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