Charging Characteristics of Rotary HTS Flux Pump with Several Superconducting Wires

Seunghak Han; Jeyull Lee; Haeryong Jeon; Ho Min Kim; Ji Hyung Kim; Young Sik Jo; Hyung Wook Kim; Tae Kuk Ko; Yong Soo Yoon

doi:10.1109/TASC.2019.2901965

Charging Characteristics of Rotary HTS Flux Pump with Several Superconducting Wires

Seunghak Han, Jeyull Lee, Haeryong Jeon, Ho Min Kim, Ji Hyung Kim, Young Sik Jo, Hyung Wook Kim, Tae Kuk Ko, Yong Soo Yoon

Department of Electrical and Electronic Engineering

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

10 Citations (Scopus)

Abstract

Higherature superconducting (HTS) flux pumps are used to charge HTS coils at cryogenic temperatures without thermal and mechanical contact with the power supply at room temperature. We found that the larger the alternating magnetic field (AMF) penetrating into the HTS wire, the faster is the current charge rate in the HTS coil and the larger will be the amount of charge. AMF causes vortex pinning of the HTS wire to move, resulting in dynamic resistance (R_dyn) and electromotive force (EMF). Charging characteristics are determined by R_dyn and EMF which are generated by effective internal resistance (R_eff) and open-circuit voltage (OCV), respectively. Even if AMF of the same magnitude penetrates the wires, the size of R_eff and EMF generated will vary depending on the characteristics of the HTS wires. Therefore, in this study, R_eff and OCV of a HTS wire are measured and compared with the results of HTS coil charging using a flux pump.

Original language	English
Article number	8653858
Journal	IEEE Transactions on Applied Superconductivity
Volume	29
Issue number	5
DOIs	https://doi.org/10.1109/TASC.2019.2901965
Publication status	Published - 2019 Aug

Bibliographical note

Publisher Copyright:
© 2002-2011 IEEE.

All Science Journal Classification (ASJC) codes

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

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10.1109/TASC.2019.2901965

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title = "Charging Characteristics of Rotary HTS Flux Pump with Several Superconducting Wires",

abstract = "Higherature superconducting (HTS) flux pumps are used to charge HTS coils at cryogenic temperatures without thermal and mechanical contact with the power supply at room temperature. We found that the larger the alternating magnetic field (AMF) penetrating into the HTS wire, the faster is the current charge rate in the HTS coil and the larger will be the amount of charge. AMF causes vortex pinning of the HTS wire to move, resulting in dynamic resistance (Rdyn) and electromotive force (EMF). Charging characteristics are determined by Rdyn and EMF which are generated by effective internal resistance (Reff) and open-circuit voltage (OCV), respectively. Even if AMF of the same magnitude penetrates the wires, the size of Reff and EMF generated will vary depending on the characteristics of the HTS wires. Therefore, in this study, Reff and OCV of a HTS wire are measured and compared with the results of HTS coil charging using a flux pump.",

author = "Seunghak Han and Jeyull Lee and Haeryong Jeon and Kim, {Ho Min} and Kim, {Ji Hyung} and Jo, {Young Sik} and Kim, {Hyung Wook} and Ko, {Tae Kuk} and Yoon, {Yong Soo}",

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year = "2019",

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doi = "10.1109/TASC.2019.2901965",

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AU - Han, Seunghak

AU - Lee, Jeyull

AU - Jeon, Haeryong

AU - Kim, Ho Min

AU - Kim, Ji Hyung

AU - Jo, Young Sik

AU - Kim, Hyung Wook

AU - Ko, Tae Kuk

AU - Yoon, Yong Soo

PY - 2019/8

Y1 - 2019/8

N2 - Higherature superconducting (HTS) flux pumps are used to charge HTS coils at cryogenic temperatures without thermal and mechanical contact with the power supply at room temperature. We found that the larger the alternating magnetic field (AMF) penetrating into the HTS wire, the faster is the current charge rate in the HTS coil and the larger will be the amount of charge. AMF causes vortex pinning of the HTS wire to move, resulting in dynamic resistance (Rdyn) and electromotive force (EMF). Charging characteristics are determined by Rdyn and EMF which are generated by effective internal resistance (Reff) and open-circuit voltage (OCV), respectively. Even if AMF of the same magnitude penetrates the wires, the size of Reff and EMF generated will vary depending on the characteristics of the HTS wires. Therefore, in this study, Reff and OCV of a HTS wire are measured and compared with the results of HTS coil charging using a flux pump.

AB - Higherature superconducting (HTS) flux pumps are used to charge HTS coils at cryogenic temperatures without thermal and mechanical contact with the power supply at room temperature. We found that the larger the alternating magnetic field (AMF) penetrating into the HTS wire, the faster is the current charge rate in the HTS coil and the larger will be the amount of charge. AMF causes vortex pinning of the HTS wire to move, resulting in dynamic resistance (Rdyn) and electromotive force (EMF). Charging characteristics are determined by Rdyn and EMF which are generated by effective internal resistance (Reff) and open-circuit voltage (OCV), respectively. Even if AMF of the same magnitude penetrates the wires, the size of Reff and EMF generated will vary depending on the characteristics of the HTS wires. Therefore, in this study, Reff and OCV of a HTS wire are measured and compared with the results of HTS coil charging using a flux pump.

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Charging Characteristics of Rotary HTS Flux Pump with Several Superconducting Wires

Abstract

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All Science Journal Classification (ASJC) codes

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