Design of HTS Tape Characteristics Measurement System

Joo, Jin-Hong; Kim, Seog-Whan; Kim, Hae Joon; Song, Kyu Jeong; Hong, Jung-Pyo

doi:10.1109/tasc.2004.830024

Cited by 6 publications

(6 citation statements)

References 2 publications

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“…A Keithley nanovoltmeter (2182A) was used to test the voltage. The critical current of superconducting tapes can be obtained by current-voltage curve of the critical current test in the fitting based on the formula [13] E = E c (I /I c ) n (8) where E c = 10 −4 V/m is the quench criterion. Firstly, the YBCO tape with the length of 35 cm was prepared and its initial critical current was measured.…”

Section: Methodsmentioning

confidence: 99%

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The Study of Critical Current for YBCO Tape in Distorted Bending Mode

Zhu

Sun

et al. 2015

J Supercond Nov Magn

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A mathematical model of equivalent bending radius was used to analyze the effect of bending strain on the critical current of yttrium barium copper oxide (YBCO) tapes in distorted bending mode. The relationship between critical current and twist pitch under different bending radii was measured. For enough larger twist pitch, even though the bending radius was smaller than the critical bending radius, the equivalent bending radius was always greater than the critical bending radius. Only when the bending radius was less than the critical bending radius and the twist pitch was reduced to a certain extent, the equivalent bending radius was smaller than the critical bending radius. As a consequence, the critical current dropped sharply and cannot be restored. The model and analytical equation was feasible and can be used for the design of solenoid YBCO magnet.

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Section: Methodsmentioning

confidence: 99%

“…HTS cable has a layered structure, which is composed of a few HTS tapes wound on the copper shaft [3,6]. The different degree twisted strain effects on the critical current of each tape must be also considered in the design and manufacture of high temperature superconducting magnet [4,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The Study of Critical Current for YBCO Tape in Distorted Bending Mode

Zhu

Sun

et al. 2015

J Supercond Nov Magn

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“…The voltage taps were attached on the HTS tape by Indium soldering at 150 . This designed and constructed measurement system was reported in our previous paper [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Transport Alternating Current Losses of BSCCO and YBCO Tapes

Kim

Joo

Song

et al. 2005

IEEE Trans. Appl. Supercond.

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After the discovery of HTS (High Temperature Superconductor), many types of HTS conductors have been developed. Several BSCCO tapes fabricated by PIT (Powder In Tube) method became commercially available, and the transport current loss characteristics of BSCCO tapes have been investigated by many research groups. The transport current loss characteristics of YBCO tapes, however, are not well studied. This is because measuring transport current requires tape samples over a certain length (15 cm for our own system). Many groups are currently focusing their effort on manufacturing long YBCO tape conductors, and new world records of length and current carrying capability are replacing the old ones in an increasingly fast rate. This paper deals with transport current losses of commercially available BSCCO tapes and YBCO tapes made at Korea Electrotechnology Research Institute (KERI) of Korea. YBCO tapes show relatively high transport current losses. This can be explained by the fact that the YBCO tape does not consist of filaments. Measurement results of the tapes are presented with analyses and discussions.

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“…Table I shows the specifications of the HTS tape used for this study. This tape conductor is fixed in a developed sample holder, which can measure transport current loss in external magnetic fields with various magnitudes and phase differences [3], [4].…”

Section: Introductionmentioning

confidence: 99%

“…For the measurement a pair of voltage tap is attached on the tape conductor, and the wires from the taps are arranged in '8' shape to minimize the effect of environmental field [3], [4]. The AC loss of the conductor can be calculated from measured current and voltage signals.…”

Section: Introductionmentioning

confidence: 99%

Effect of AC Magnetic Field on Transport Current Loss of HTS Tapes

Kim

Ryu

Huh

et al. 2004

IEEE Trans. Appl. Supercond.

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It is known that external magnetic field not only causes the magnetization loss in a superconducting tape, but also increases the transport current loss, by the so-called "dynamic resistance." In power applications, superconductors carrying alternating current should be in alternating magnetic field. The frequency of the field is usually the same as that of the transport current, but they have phase difference. We developed an experimental system, which can measure transport current loss in external AC magnetic fields. With this equipment, we explored the effect of external field on the transport current loss with various field strengths and phase differences. This paper describes experimental results and discussions on the effect of amplitude and phase on transport current loss of HTS (High Temperature Superconductor) tape.Index Terms-AC loss, HTS tape, magnetic field, phase difference, transport current loss.

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Design of HTS Tape Characteristics Measurement System

Cited by 6 publications

References 2 publications

The Study of Critical Current for YBCO Tape in Distorted Bending Mode

The Study of Critical Current for YBCO Tape in Distorted Bending Mode

Transport Alternating Current Losses of BSCCO and YBCO Tapes

Effect of AC Magnetic Field on Transport Current Loss of HTS Tapes

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