• 2325 Citations
  • 21 h-Index
1987 …2020

Research output per year

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Research Output

AC loss measurement of Bi-2223 conductors

Jang, M. H., Chu, Y., Ko, T. K., Oh, S. S. & Joo, J. H., 2000 Nov, In : Physica C: Superconductivity and its applications. 341-348 (IV), p. 2575-2576 2 p.

Research output: Contribution to journalConference article

1 Citation (Scopus)

AC loss measurement of bifilarly wound magnet using coated conductor

Chang, K. S., Yang, S. E., Jang, D. H., Park, D. K., Ahn, M. C., Sim, K., Kang, H., Seok, B. Y. & Ko, T. K., 2007 Jun 1, In : IEEE Transactions on Applied Superconductivity. 17, 2, p. 1883-1886 4 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)

A comparison on the heat load of HTS current leads with respect to uniform and non-uniform cross-sectional areas

Han, S., Nam, S., Lee, J., Song, S., Jeon, H., Baek, G., Kang, H. & Ko, T. K., 2017 Sep, In : Progress in Superconductivity and Cryogenics (PSAC). 19, 3, p. 44-48 5 p.

Research output: Contribution to journalArticle

A design and tests ot hts power cables and feasibility study of hts power transmission system in KOREA

Clio, J., Seong, K. C., Ryu, K. S. & Ko, T. K., 2000 Jan 1, In : IEEE Transactions on Applied Superconductivity. 10, 1, 1 p.

Research output: Contribution to journalConference article

A feasibility study of full-bridge type superconducting fault current controller on electric machine power stability

Jang, J. Y., Hwang, Y. J., Lee, J. & Ko, T. K., 2015 Dec 21, In : Superconductor Science and Technology. 29, 2, 025011.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Analysis of a High-Tc Superconducting Power Converting System

Yoon, Y. S., Jo, H. C., Park, Y. G., Lee, J., Yoon, K. Y., Kim, H. M., Chung, Y. D., Chu, Y. & Ko, T. K., 2015 Jun 1, In : IEEE Transactions on Applied Superconductivity. 25, 3, 7053951.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Analysis of a joint method between superconducting YBCO coated conductors

Park, D. K., Ahn, M. C., Kim, H. M., Lee, H. G., Chang, K. S., Lee, S. J., Yang, S. E. & Ko, T. K., 2007 Jun 1, In : IEEE Transactions on Applied Superconductivity. 17, 2, p. 3266-3269 4 p.

Research output: Contribution to journalArticle

51 Citations (Scopus)

Analysis of charging characteristics of linear type magnetic flux pump depended on traveling speed of magnetic field

Chung, Y. D., Kim, H. K., Bae, D. K., Yoon, Y. S., Jo, H. C. & Ko, T. K., 2010 Mar 1, In : Journal of the Korea Institute of Applied Superconductivity and Cryogenics. 12, 1, p. 47-51 5 p.

Research output: Contribution to journalArticle

Analysis of driving mechanism for tiny piezoelectric linear motor

Kang, C. Y., Yoo, K. H., Ko, H. P., Kim, H. J., Ko, T. K. & Yoon, S. J., 2006 Dec 1, In : Journal of Electroceramics. 17, 2-4, p. 609-612 4 p.

Research output: Contribution to journalArticle

17 Citations (Scopus)

Analysis of magnetic field harmonics change due to manufacturing error in air-core HTS quadruple magnet

Kim, J., Baek, G., Lee, J., Choi, Y., Han, S., Song, S. & Ko, T. K., 2019 Mar, In : Cryogenics. 98, p. 39-46 8 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Analysis of the current charge and discharge characteristics of a small-scale turn-to-turn soldered HTS coil

Lee, W. S., Lee, J., Song, S., Park, Y. G., Jin, H., Hahn, S., Ahn, M. C. & Ko, T. K., 2015 Jun 1, In : IEEE Transactions on Applied Superconductivity. 25, 3, 7042729.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Analysis of the Dielectric Characteristics of Gaseous Nitrogen According to Various Temperatures and Pressures for a Magnet System

Nam, S., Lee, W. S., Lee, H., Kang, J. O., Kim, J., Mo, Y. K., Bang, S., Lee, O., Kang, H. & Ko, T. K., 2017 Aug 1, In : Journal of Superconductivity and Novel Magnetism. 30, 8, p. 2347-2352 6 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Analysis of the Notch Effect on Flux Diverters for High-Temperature Superconducting Magnets

Song, S., Lee, W. S., Park, Y. G., Nam, S., Jeon, H., Baek, G., Ahn, M. C., Lee, J., Choi, Y. & Ko, T. K., 2016 Jun, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7431974.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Analysis of the operational characteristics of a heater-trigger type high-Tc superconducting power supply

Yoon, Y. S., Lee, S. J., Kim, H. M. & Ko, T. K., 1999 Dec 1, In : IEEE Transactions on Applied Superconductivity. 9, 4, p. 4708-4714 7 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Analysis of the operational characteristics of a high-Tc superconducting power supply with the Bi-2223 pancake load

Yoon, Y. S., Kim, H. M., Ahn, M. C., Lee, C., Ko, T. K. & Oh, S. S., 2001 Sep, In : IEEE Transactions on Applied Superconductivity. 11, 3, p. 4071-4077 7 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Analysis of the operational characteristics of a resistive SFCL by using the YBCO coated conductor

Park, D. K., Yang, S. E., Yoon, Y. S., Ahn, M. C., Kim, H. M., Kim, Y. S., Park, J. W. & Ko, T. K., 2007 Jun 1, In : IEEE Transactions on Applied Superconductivity. 17, 2, p. 1851-1854 4 p.

Research output: Contribution to journalArticle

15 Citations (Scopus)

Analysis of the operational characteristics of discrete-sheet type low-Tc superconducting power supply

Kim, H. M., Yoon, Y. S., Ahn, M. C., Chu, Y., Lee, S. J., Han, T. S., Oh, S. S. & Ko, T. K., 2001 Mar 1, In : IEEE Transactions on Applied Superconductivity. 11, 1 II, p. 2339-2342 4 p.

Research output: Contribution to journalConference article

1 Citation (Scopus)

Analysis of Voltage Noises for the Reliability Improvement of the KSTAR CS Quench Detection

Baek, G., Kim, J., Kang, H., Ko, T. K. & Chu, Y., 2018 Jun, In : IEEE Transactions on Applied Superconductivity. 28, 4, 4701904.

Research output: Contribution to journalArticle

Analysis on ground conductor shape and size effect to levitation force in static type EDS simulator

Lee, J., Bae, D. K., Kang, H., Ahn, M. C., Lee, Y. S. & Ko, T. K., 2010 Jun 1, In : IEEE Transactions on Applied Superconductivity. 20, 3, p. 896-899 4 p., 5433291.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Analysis on the dielectric characteristics of insulation gases for developing a high voltage superconducting fault current limiter

Kang, H. & Ko, T. K., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 2, p. 1332-1335 4 p., 5710668.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Analysis on the thermal and electrical characteristics of impregnating materials for the bifilar winding-type superconducting fault current limiter

Yang, S. E., Bae, D. K., Yoon, K. Y., Yoon, Y. S., Ko, T. K. & Kim, S. H., 2006 May, In : Cryogenics. 46, 5 SPEC. ISS., p. 338-342 5 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
1 Citation (Scopus)

Analytical and experimental studies on the hybrid fault current limiter employing asymmetric non-inductive coil and fast switch

Park, D. K., Chang, K. S., Yang, S. E., Kim, Y. J., Ahn, M. C., Yoon, Y. S., Kim, H. M., Park, J. W. & Ko, T. K., 2009 Jun 1, In : IEEE Transactions on Applied Superconductivity. 19, 3, p. 1896-1899 4 p., 5067142.

Research output: Contribution to journalArticle

15 Citations (Scopus)

Analytical design method of high-Tc coated conductor for a resistive superconducting fault current limiter using finite element method

Kim, Y. J., Park, D. K., Yang, S. E., Kim, W. C., Ahn, M. C., Yoon, Y. S., Kwon, N. Y., Lee, H. & Ko, T. K., 2010 Jun 1, In : IEEE Transactions on Applied Superconductivity. 20, 3, p. 1172-1176 5 p., 5422874.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Analytic Study of the Active Quench Detection Method for High-Temperature Superconducting Magnet Using Resonance Circuit

Song, S., Choi, Y., Lee, W. S., Sim, K., Hwang, Y. J., Jang, J. Y., Kang, H. & Ko, T. K., 2018 Apr, In : IEEE Transactions on Applied Superconductivity. 28, 3, 4701304.

Research output: Contribution to journalArticle

1 Citation (Scopus)

An analysis and short circuit test of various types of Bi-2223 bifilar winding fault current limiting module

Park, D. K., Ahn, M. C., Park, S., Kang, H., Bae, D. K., Yang, S. E., Seok, B. Y. & Ko, T. K., 2006 Jun 1, In : IEEE Transactions on Applied Superconductivity. 16, 2, p. 703-706 4 p., 1642945.

Research output: Contribution to journalArticle

11 Citations (Scopus)

A new quench protection system using dual-capacitor switching for fast energy extraction from HTS magnets

Choi, Y., Lee, W. S., Song, S., Jeon, H. & Ko, T. K., 2019 Aug, In : IEEE Transactions on Applied Superconductivity. 29, 5, 8691554.

Research output: Contribution to journalArticle

2 Citations (Scopus)

An experimental analysis on the design of HTS current lead with respect to the arrangement of coated conductor and the shape of a current terminal

Chang, K. S., Jang, J. Y., Lee, J. & Ko, T. K., 2011 Nov 1, In : Physica C: Superconductivity and its applications. 471, 21-22, p. 1007-1011 5 p.

Research output: Contribution to journalArticle

An experimental study on the joint methods between double pancake coils using YBCO coated conductors

Chang, K. S., Jo, H. C., Kim, Y. J., Cheolahn, M. & Ko, T. K., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 3, p. 3005-3008 4 p., 5672801.

Research output: Contribution to journalArticle

9 Citations (Scopus)

An improved parallel processing ups using a voltage-controlled voltage source inverter

Lee, S. W., Dehbonei, H., Ko, S. H., Lee, S. R., Jang, B. H., Moon, Y. H. & Ko, T. K., 2007 Dec 1, 7th International Conference on Power Electronics and Drive Systems, PEDS 2007. p. 1508-1512 5 p. 4487905. (Proceedings of the International Conference on Power Electronics and Drive Systems).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

A novel and smart design of superconducting fault current controller: Implementation and verification for various fault condition

Jang, J. Y., Lee, J., Park, Y. G., Kim, J., Shim, J. W., Ahn, M. C., Hur, K., Ko, T. K., Al-Ammar, A. & Babar, M., 2013 Mar 11, In : IEEE Transactions on Applied Superconductivity. 23, 3, 6373702.

Research output: Contribution to journalArticle

5 Citations (Scopus)

A novel fault diagnosis method for high-temperature superconducting field coil of superconducting rotating machine

Song, S., Ko, T. K., Choi, Y. & Lee, S. G., 2020 Jan 1, In : Applied Sciences (Switzerland). 10, 1, 223.

Research output: Contribution to journalArticle

Open Access
2 Citations (Scopus)

A Novel Magnetic Field Active Shim Method for Air-Core Higherature Superconducting Quadruple Magnet

Kim, J., Baek, G., Lee, W. S., Lee, S., Zhang, Z. & Ko, T. K., 2019 Aug, In : IEEE Transactions on Applied Superconductivity. 29, 5, 8654673.

Research output: Contribution to journalArticle

1 Citation (Scopus)
1 Citation (Scopus)

A numerical study on the feasibility evaluation of a hybrid type superconducting fault current limiter applying thyristors

Nam, S., Lee, W. S., Lee, J., Hwang, Y. J. & Ko, T. K., 2013 Dec 1, In : Progress in Superconductivity and Cryogenics (PSAC). 15, 4, p. 26-29 4 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

A research about bending strain effect on splice characteristics in YBa2 Cu3 O7 coated conductors under various pressures in splicing

Kim, H. J., Chang, K. S., Kim, Y. J., Jo, H. C., Kim, K. J., Lee, H. & Ko, T. K., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 3, p. 3001-3004 4 p., 5675717.

Research output: Contribution to journalArticle

4 Citations (Scopus)

A research on design method and theoretical analysis of electromagnetic suspension system considering magnetic interface between coils

Jang, J. Y., Kim, Y. J., Chang, K. S., Chung, Y. D., Lee, C. Y. & Ko, T. K., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 2, p. 1523-1527 5 p., 5643151.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Artificial neural network interpolation for magnetic field mapping in an air-core HTS quadruple magnet

Baek, G., Kim, J., Ko, T. K. & Lee, S., 2020 Apr, In : Cryogenics. 107, 103043.

Research output: Contribution to journalArticle

A simulation study on the variation of virtual NMR signals by winding, bobbin, spacer error of HTS magnet

Kim, J., Lee, W. S., Kim, J., Song, S., Nam, S., Jeon, H., Baek, G. & Ko, T. K., 2016 Sep, In : Progress in Superconductivity and Cryogenics (PSAC). 18, 3, p. 21-24 4 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

A structure design of HTS current leads with respect to the structure of coated conductor and the current terminal

Chang, K. S., Jang, J. Y., Choi, S. J., Jo, H. C., Kim, Y. J., Ahn, M. C., Kim, H. M. & Ko, T. K., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 3, p. 3013-3016 4 p., 5674100.

Research output: Contribution to journalArticle

2 Citations (Scopus)

A study on AC loss characteristics of asymmetric non-inductive coils with combination of superconducting wires

Kim, J. S., Hwang, Y. J., Na, J. B., Choi, S. J., Kim, Y. J., Lee, J. H., Lee, W. S., Chang, K. S. & Ko, T. K., 2011 Mar, In : Journal of the Korea Institute of Applied Superconductivity and Cryogenics. 13, 1, p. 17-21 5 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

A study on a modeling method about current-voltage characteristic of HTS tape considering resistance of stabilizer

Lee, W. S., Lee, J., Nam, S. & Ko, T. K., 2013 Dec 12, In : Progress in Superconductivity and Cryogenics (PSAC). 15, 3, p. 9-12 4 p.

Research output: Contribution to journalArticle

A study on an algorithm for finding magnetic center of an asymmetric HTS magnet with 3-axis mapper

Lee, W. S., Ahn, M. C., Hahn, S. Y. & Ko, T. K., 2013 Jan 30, In : IEEE Transactions on Applied Superconductivity. 23, 3, 6373705.

Research output: Contribution to journalArticle

1 Citation (Scopus)

A study on a splice method of YBCO coated conductors with curvature for HTS magnet application

Kim, H. J., Jo, H. C., Chang, K. S., Yang, M. K., Ahn, M. C. & Ko, T. K., 2010 Mar 1, In : Journal of the Korea Institute of Applied Superconductivity and Cryogenics. 12, 1, p. 17-21 5 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

A study on prototype hybrid (LTS/HTS) magnet for NMR application

Choi, S., Hwang, Y. J. & Ko, T. K., 2011 Sep 1, In : Journal of Magnetics. 16, 3, p. 312-317 6 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

A study on the basic characteristics of persistent current mode operation for small scale high temperature superconducting coil with no-insulation winding method

Lee, T. S., Lee, W. S., Choi, S., Jo, H. C., Kim, H. J., Lee, J., Kang, J. S., Kwon, O. J., Lee, H. G. & Ko, T. K., 2012 Jan 1, In : Journal of the Korea Institute of Applied Superconductivity and Cryogenics. 14, 3, p. 23-27 5 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

A study on the characteristic evaluation of an HTS coil with respect to the winding methods

Jo, H. C., Choi, S., Jang, J. Y., Hwang, Y. J., Lee, C. Y., Ahn, M. C., Yoon, Y. S. & Ko, T. K., 2010 Dec 1, In : Journal of the Korea Institute of Applied Superconductivity and Cryogenics. 12, 4, p. 31-35 5 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)