Effects of AC disturbance on cowinding HTS coils according to the inserted materials

Jinsub Kim, Young Jin Hwang, Woo Seung Lee, Tae Sung Lee, Jeyull Lee, Tae Kuk Ko

Research output: Contribution to journalArticle

Abstract

Alternating field causes energy loss due to induced back electromotive force (EMF) to high-temperature superconducting (HTS) coils in the superconducting electric machines. Therefore, a method of reducing the effects of the alternating fields on the HTS coils in superconducting machines according to the winding insulation conditions has been investigated. In addition, the HTS coils cowound with turn-to-turn inserted materials to control the time constant has been proposed. The charge-discharge delay can be determined with the time constant, also the time constant is related to the radial directional resistance of the no-insulation coil. The variation of the radial resistance would affect the reduction effect of ac disturbance on the no-insulation coil. Therefore, trade-off between the reduction effect of the alternating disturbance and charge-discharge delay could be considered. In this paper, we evaluated the effects of alternating magnetic fields on the HTS coils according to the varying radial resistance caused by cowinding method with metal tapes in liquid nitrogen. Four types of the HTS coils are: 1) no-insulation coil, 2) cowound coil with copper tape, 3) cowound coil with stainless steel tape and 4) insulation coil which have different radial resistance respectively. The experimental result shows that the co-winding method can be applicable in the superconducting electric machines.

Original languageEnglish
Article number7001577
JournalIEEE Transactions on Applied Superconductivity
Volume25
Issue number3
DOIs
Publication statusPublished - 2015 Jun 1

Fingerprint

Insulation
alternating current
disturbances
coils
Tapes
Electric machinery
insulation
Temperature
tapes
time constant
Electromotive force
Stainless Steel
Liquid nitrogen
Copper
Energy dissipation
Stainless steel
Metals
Superconducting coils
Magnetic fields
electromotive forces

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Kim, Jinsub ; Hwang, Young Jin ; Lee, Woo Seung ; Lee, Tae Sung ; Lee, Jeyull ; Ko, Tae Kuk. / Effects of AC disturbance on cowinding HTS coils according to the inserted materials. In: IEEE Transactions on Applied Superconductivity. 2015 ; Vol. 25, No. 3.
@article{d8bcad70b04b49b8be442b2108e1a9ca,
title = "Effects of AC disturbance on cowinding HTS coils according to the inserted materials",
abstract = "Alternating field causes energy loss due to induced back electromotive force (EMF) to high-temperature superconducting (HTS) coils in the superconducting electric machines. Therefore, a method of reducing the effects of the alternating fields on the HTS coils in superconducting machines according to the winding insulation conditions has been investigated. In addition, the HTS coils cowound with turn-to-turn inserted materials to control the time constant has been proposed. The charge-discharge delay can be determined with the time constant, also the time constant is related to the radial directional resistance of the no-insulation coil. The variation of the radial resistance would affect the reduction effect of ac disturbance on the no-insulation coil. Therefore, trade-off between the reduction effect of the alternating disturbance and charge-discharge delay could be considered. In this paper, we evaluated the effects of alternating magnetic fields on the HTS coils according to the varying radial resistance caused by cowinding method with metal tapes in liquid nitrogen. Four types of the HTS coils are: 1) no-insulation coil, 2) cowound coil with copper tape, 3) cowound coil with stainless steel tape and 4) insulation coil which have different radial resistance respectively. The experimental result shows that the co-winding method can be applicable in the superconducting electric machines.",
author = "Jinsub Kim and Hwang, {Young Jin} and Lee, {Woo Seung} and Lee, {Tae Sung} and Jeyull Lee and Ko, {Tae Kuk}",
year = "2015",
month = "6",
day = "1",
doi = "10.1109/TASC.2014.2388152",
language = "English",
volume = "25",
journal = "IEEE Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

Effects of AC disturbance on cowinding HTS coils according to the inserted materials. / Kim, Jinsub; Hwang, Young Jin; Lee, Woo Seung; Lee, Tae Sung; Lee, Jeyull; Ko, Tae Kuk.

In: IEEE Transactions on Applied Superconductivity, Vol. 25, No. 3, 7001577, 01.06.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of AC disturbance on cowinding HTS coils according to the inserted materials

AU - Kim, Jinsub

AU - Hwang, Young Jin

AU - Lee, Woo Seung

AU - Lee, Tae Sung

AU - Lee, Jeyull

AU - Ko, Tae Kuk

PY - 2015/6/1

Y1 - 2015/6/1

N2 - Alternating field causes energy loss due to induced back electromotive force (EMF) to high-temperature superconducting (HTS) coils in the superconducting electric machines. Therefore, a method of reducing the effects of the alternating fields on the HTS coils in superconducting machines according to the winding insulation conditions has been investigated. In addition, the HTS coils cowound with turn-to-turn inserted materials to control the time constant has been proposed. The charge-discharge delay can be determined with the time constant, also the time constant is related to the radial directional resistance of the no-insulation coil. The variation of the radial resistance would affect the reduction effect of ac disturbance on the no-insulation coil. Therefore, trade-off between the reduction effect of the alternating disturbance and charge-discharge delay could be considered. In this paper, we evaluated the effects of alternating magnetic fields on the HTS coils according to the varying radial resistance caused by cowinding method with metal tapes in liquid nitrogen. Four types of the HTS coils are: 1) no-insulation coil, 2) cowound coil with copper tape, 3) cowound coil with stainless steel tape and 4) insulation coil which have different radial resistance respectively. The experimental result shows that the co-winding method can be applicable in the superconducting electric machines.

AB - Alternating field causes energy loss due to induced back electromotive force (EMF) to high-temperature superconducting (HTS) coils in the superconducting electric machines. Therefore, a method of reducing the effects of the alternating fields on the HTS coils in superconducting machines according to the winding insulation conditions has been investigated. In addition, the HTS coils cowound with turn-to-turn inserted materials to control the time constant has been proposed. The charge-discharge delay can be determined with the time constant, also the time constant is related to the radial directional resistance of the no-insulation coil. The variation of the radial resistance would affect the reduction effect of ac disturbance on the no-insulation coil. Therefore, trade-off between the reduction effect of the alternating disturbance and charge-discharge delay could be considered. In this paper, we evaluated the effects of alternating magnetic fields on the HTS coils according to the varying radial resistance caused by cowinding method with metal tapes in liquid nitrogen. Four types of the HTS coils are: 1) no-insulation coil, 2) cowound coil with copper tape, 3) cowound coil with stainless steel tape and 4) insulation coil which have different radial resistance respectively. The experimental result shows that the co-winding method can be applicable in the superconducting electric machines.

UR - http://www.scopus.com/inward/record.url?scp=84923886364&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84923886364&partnerID=8YFLogxK

U2 - 10.1109/TASC.2014.2388152

DO - 10.1109/TASC.2014.2388152

M3 - Article

AN - SCOPUS:84923886364

VL - 25

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

IS - 3

M1 - 7001577

ER -