• 2338 Citations
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1987 …2020

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2020

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)

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

Charging Characteristics of Series Connected Insulation and No-Insulation HTS Coils by Rotary HTS Flux Pump

Han, S., Jeon, H., Kim, H. M., Kim, J. H., Chae, Y. S., Ko, T. K. & Yoon, Y. S., 2020 Jun, In : IEEE Transactions on Applied Superconductivity. 30, 4, 9079645.

Research output: Contribution to journalArticle

Effect of Screening Current Induced Field on Field Quality of an Air-Core HTS Quadrupole Magnet

Baek, G., Kim, J., Han, S., Yoon, Y. S., Lee, S. & Ko, T. K., 2020 Jun, In : IEEE Transactions on Applied Superconductivity. 30, 4, 9031392.

Research output: Contribution to journalArticle

Experimental Test of the Magnetic Field Active Shimming Method for Air-Core HTS Quadruple Magnet

Kim, J., Choi, Y., Lee, W., Baek, G., Ko, T. K., Lee, S. & Park, K. M., 2020 Jun, In : IEEE Transactions on Applied Superconductivity. 30, 4, 8957528.

Research output: Contribution to journalArticle

Open Access

Optimal Design and Performance Evaluation of Dual-Capacitor Switching (DCS) Quench Protection System for Superconducting Magnet

Choi, Y., Lee, W. S., Song, S., Jeon, H. & Ko, T. K., 2020 Jun, In : IEEE Transactions on Applied Superconductivity. 30, 4, 9050488.

Research output: Contribution to journalArticle

2019

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)

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

3 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)

Charging Characteristics of Rotary HTS Flux Pump with Several Superconducting Wires

Han, S., Lee, J., Jeon, H., Kim, H. M., Kim, J. H., Jo, Y. S., Kim, H. W., Ko, T. K. & Yoon, Y. S., 2019 Aug, In : IEEE Transactions on Applied Superconductivity. 29, 5, 8653858.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Effect of Crossover Turns in Double-Pancake Winding on Magnetic Field Homogeneity of HTS NMR Magnet

Baek, G., Lee, J., Lee, W. S., Yoon, Y. S. & Ko, T. K., 2019 Aug, In : IEEE Transactions on Applied Superconductivity. 29, 5, 4300505.

Research output: Contribution to journalArticle

Fabrication and Charging Test of HTS Field Windings Using HTS Contactless Rotary Excitation Device

Kim, J. H., Quach, H. L., Boo, C. J., Yoon, Y. S., Jeon, H., Han, S., Ko, T. K., Kim, H. W., Jo, Y. S., Park, H. J., Lee, J., Lee, H. & Kim, H. M., 2019 Aug, In : IEEE Transactions on Applied Superconductivity. 29, 5, 8661675.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Hall voltage measurement with respect to internal layout of REBCO coated conductors in an external magnetic field

Kim, Y. G., Baek, G., Han, S., Choi, Y., Kim, J., Jeon, H. & Ko, T. K., 2019, In : Progress in Superconductivity and Cryogenics (PSAC). 21, 4, p. 48-52 5 p.

Research output: Contribution to journalArticle

2018

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

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)

Characteristic Analysis of a 1-kW-Class HTS Motor Considering Armature Current Information

Kim, J. H., Hyeon, C. J., Quach, H. L., Chae, S. H., Lee, J., Jeon, H., Han, S., Ko, T. K., Yoon, Y. S., Kim, H. W., Jo, Y. S. & Kim, H. M., 2018 Jun, In : IEEE Transactions on Applied Superconductivity. 28, 4, 5207205.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Comparative Study of Magnetic Characteristics of Air-Core and Iron-Core High-Temperature Superconducting Quadrupole Magnets

Lee, J., Kim, J., Baek, G., Choi, Y., Choi, Y. H., Zhang, Z., Do Chung, Y., Kang, H., Lee, H., Lee, S. & Ko, T. K., 2018 Apr, In : IEEE Transactions on Applied Superconductivity. 28, 3, 8234611.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Degradation of critical current in an HTS coated conductor considering curvature of ellipse for rotating flux pump

Han, S., Lee, J., Jeon, H., Ko, T. K., Kim, H. M., Kim, J. H., Hyeon, C. J. & Yoon, Y. S., 2018 Jan, In : Cryogenics. 89, p. 141-146 6 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Degradation of Critical Current in an HTS Tape with Combined Bending and Torsion Considering Curvature of Elliptical Shape

Han, S., Lee, J., Jeon, H., Kim, J. H., Hyeon, C. J., Kim, H. M., Kang, H., Ko, T. K. & Yoon, Y. S., 2018 Apr, In : IEEE Transactions on Applied Superconductivity. 28, 3, 8186202.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Experimental Analysis of Charging Characteristics of HTS Field Coils with HTS Contactless Rotary Excitation Device Considering Various HTS Loads

Lee, J., Jeon, H., Han, S., Kim, J. H., Hyeon, C. J., Kim, H. M., Ko, T. K., Park, D. K. & Yoon, Y. S., 2018 Apr, In : IEEE Transactions on Applied Superconductivity. 28, 3, 8264767.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Methods for Increasing the Saturation Current and Charging Speed of a Rotary HTS Flux-Pump to Charge the Field Coil of a Synchronous Motor

Jeon, H., Lee, J., Han, S., Kim, J. H., Hyeon, C. J., Kim, H. M., Park, D., Do Chung, Y., Ko, T. K. & Yoon, Y. S., 2018 Apr, In : IEEE Transactions on Applied Superconductivity. 28, 3, 8259254.

Research output: Contribution to journalArticle

9 Citations (Scopus)

PID Control of an Electromagnet-Based Rotary HTS Flux Pump for Maintaining Constant Field in HTS Synchronous Motors

Jeon, H., Lee, J., Han, S., Kim, J. H., Hyeon, C. J., Kim, H. M., Kang, H., Ko, T. K. & Yoon, Y. S., 2018 Jun, In : IEEE Transactions on Applied Superconductivity. 28, 4, 5207605.

Research output: Contribution to journalArticle

9 Citations (Scopus)

Quench and recovery characteristics of second-generation high-temperature superconducting GdBCO coated conductor with various patterns of stabilizers

Choi, Y. H., Kim, J. C., Kim, Y. G., Kim, J. S., Ko, T. K., Choi, Y. S. & Lee, H. G., 2018 Sep, In : Results in Physics. 10, p. 222-226 5 p.

Research output: Contribution to journalArticle

Open Access
1 Citation (Scopus)
2017

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

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)

A study on the YBCO-Coated conductor current lead with asymmetric structure tape considering temperature distribution

Nam, S., Lee, W. S., Lee, J., Jeon, H., Han, S., Choi, Y., Lee, J. & Ko, T. K., 2017 Jun, In : IEEE Transactions on Applied Superconductivity. 27, 4, 7839932.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Energy extraction system using dual-capacitor switching for quench protection of HTS magnet

Choi, Y., Lee, W. S., Song, S., Jeon, H., Kang, H. & Ko, T. K., 2017 Sep, In : Progress in Superconductivity and Cryogenics (PSAC). 19, 3, p. 49-53 5 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Field gradient calculation of HTS double-pancake coils considering the slanted turns and the splice

Baek, G., Kim, J., Lee, W. S., Song, S., Lee, O., Kang, H. & Ko, T. K., 2017 Mar, In : Progress in Superconductivity and Cryogenics (PSAC). 19, 1, p. 51-55 5 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Investigation of electrical characteristics of no-insulation coil wound with surface-processed HTS tape

Jeon, H., Lee, W. S., Kim, J., Baek, G., Jeon, S., Yoon, Y. S. & Ko, T. K., 2017 Aug 15, In : Physica C: Superconductivity and its applications. 539, p. 25-29 5 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Study on Quench Detection of the KSTAR PF Coils Using Numerical Compensation of Inductive Voltages with Genetic Algorithm

Kim, J., An, S. C., Choi, Y., Ko, T. K. & Chu, Y., 2017 Jun, In : IEEE Transactions on Applied Superconductivity. 27, 4, 7778126.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2016

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)

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)

Design and Test of HTS Power Converting System with Multiple Magnets Considering Various Sequential Controls of Heater-Triggered Switches

Lee, J., Park, Y. G., Jo, H. C., Kim, H. M., Chung, Y. D., Chu, Y., Ko, T. K. & Yoon, Y. S., 2016 Apr, In : IEEE Transactions on Applied Superconductivity. 26, 3, 7420669.

Research output: Contribution to journalArticle

Discharge Voltage Effects on High-TC Superconducting Tapes with Respect to Tensile Stress

Nam, S., Lee, W. S., Lee, H., Kang, J. O., Kim, J., Mo, Y. K., Bang, S., Lee, O., Kang, H. & Ko, T. K., 2016 Jun, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7429707.

Research output: Contribution to journalArticle

Experimental Analysis of Thermally and Magnetically Triggered Switch for High-Tc Superconducting Power Converting System

Lee, J., Kim, J., Kim, J., Park, Y. G., Lee, W. S., Lee, J., Chung, Y. D., Yoon, K. Y., Kim, H. M., Yoon, Y. S. & Ko, T. K., 2016 Jun, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7399360.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Experimental Analysis on AC Loss and Fault Current Test of HTS Coils Co-Wound with Various Inserted Materials

Kim, J., Nam, S., Jeon, H., Kim, J., Jang, J. Y. & Ko, T. K., 2016 Jun, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7416632.

Research output: Contribution to journalArticle

5 Citations (Scopus)
1 Citation (Scopus)

Magnetic Field Stability Analysis on No-Insulation and Turn-to-Turn Soldered HTS Magnets under Sinusoidal Noise Operation

Lee, W. S., Park, Y. G., Kim, J., Song, S., Jeon, H., Kim, Y. G., Lee, H. & Ko, T. K., 2016 Jun, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7378409.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Operational Characteristics of HTS Coils with Flux Diverters in Semipersistent Mode under Alternating Magnetic Field

Park, Y. G., Lee, W. S., Lee, J., Song, S., Hwang, Y. J., Chung, Y. D. & Ko, T. K., 2016 Jun, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7434615.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Quench analysis and protection circuit design of a superconducting magnet system for RISP 28GHz ECR ion source

Song, S., Ko, T. K., Choi, S. & Ahn, M. C., 2016 Jan 1, In : Progress in Superconductivity and Cryogenics (PSAC). 18, 2, p. 37-41 5 p.

Research output: Contribution to journalArticle

Study on quench detection of the KSTAR CS coil with CDA+MIK compensation of inductive voltages

An, S. C., Kim, J., Ko, T. K. & Chu, Y., 2016 Mar, In : Progress in Superconductivity and Cryogenics (PSAC). 18, 1, p. 55-58 4 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Test and Analysis of Electromagnetic and Mechanical Properties of HTS Coil during Quench State

Park, Y. G., Jo, H. C., Lee, J., Kim, H. M., Chung, Y. D., Chu, Y., Yoon, K. Y., Ko, T. K. & Yoon, Y. S., 2016 Apr, In : IEEE Transactions on Applied Superconductivity. 26, 3, 4602104.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2015

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

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 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)
1 Citation (Scopus)

Degradation characteristics of superconducting wires with respect to electrical breakdown tests

Kang, J. O., Lee, O., Bang, S., Kim, J., Lee, H., Hong, J., Nam, S., Ko, T. K., Chung, Y. D. & Kang, H., 2015 Jun 1, In : IEEE Transactions on Applied Superconductivity. 25, 3, 6985556.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Dielectric characteristics of solid insulation materials with respect to surface roughness

Kim, Y. H., Lee, H., Lee, O., Kim, J., Bang, S., Kang, J. O., Hong, J., Nam, S., Ko, T. K. & Kang, H., 2015 Jun 1, In : IEEE Transactions on Applied Superconductivity. 25, 3, 6971148.

Research output: Contribution to journalArticle

8 Citations (Scopus)