Transport AC Losses in YBCO Coated Conductors

Gianni, L.; Bindi, M.; Fontana, F.; Ginocchio, S.; Martini, L.; Perini, E.; Zannella, S.

doi:10.1109/tasc.2006.870819

Cited by 27 publications

(17 citation statements)

References 3 publications

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“…8 we have plotted the experimental data of losses in 2G sample and the sum with Norris's models with ferromagnetic losses. FM1 corresponds to data from [4,6] and FM2 corresponds to data from [5,6]. In general, the addition of the ferromagnetic losses FM1 or FM2 to the Norris Elliptical losses improves considerably the agreement with our experimental measurements as in [6].…”

Section: Transport Losses In a Single Tape Under The Influence Of Anosupporting

confidence: 64%

“…FM1 corresponds to data from [4,6] and FM2 corresponds to data from [5,6]. In general, the addition of the ferromagnetic losses FM1 or FM2 to the Norris Elliptical losses improves considerably the agreement with our experimental measurements as in [6]. However, our measurements fit to "FM2 + Norris Elliptic" for all values of I L but only fit to "FM1 + Norris Elliptic" for I L > 25 A.…”

Section: Transport Losses In a Single Tape Under The Influence Of Anosupporting

confidence: 60%

“…The sample shows significantly higher losses compared with the theoretical values at currents lower than the critical current. This indicates that the losses in the 2G tapes are affected by the magnetic losses in the ferromagnetic substrates [4,[5][6][7]. 7.…”

Section: Transport Losses In a Single Tape With External Magnetic Fieldmentioning

confidence: 97%

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Study of AC Losses in Superconducting Electrical Components for Electrical System Design

Ceballos

Álvarez

2010

IFIP Advances in Information and Communication Technology

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An experimental rig allowing us to perform AC loss measurements, on short (10 cm) tape samples of high-temperature superconductor Bi-2223/Ag, was designed and tested.We propose a new setup in order to determine AC losses in multilayer superconducting coils. We made a comparative AC losses study of an isolated tape and of the same tape in the same conditions except for the proximity of another tape, with and without current, located just over the first one. We present a serial of results obtains from different tapes, first we used multifilament BSCCO tape (1G) and YBCO tape (2G) with ferromagnetic substrate.

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Section: Transport Losses In a Single Tape Under The Influence Of Anosupporting

confidence: 64%

Section: Transport Losses In a Single Tape Under The Influence Of Anosupporting

confidence: 60%

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Study of AC Losses in Superconducting Electrical Components for Electrical System Design

Ceballos

Álvarez

2010

IFIP Advances in Information and Communication Technology

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“…[2], thus allowing for about 10 K operational margin. The HTS strand power losses are estimated by scaling the projections for the YBCO filament given in [6], and for the Ni5%W substrate, both in the strand and magnetic screen tapes, by using the measurements presented in [7]. The eddy power losses in the LTS and HTS test cables were calculated using standard formulation for the round pipe and slab [8] with the physical parameters of the sub-components as listed in Tables I and II, respectively.…”

Section: Projection Of Power Lossesmentioning

confidence: 99%

A Measurement of HTS Cable Power Loss in a Sweeping Magnetic Field

Piekarz

Hays²,

Blowers³

et al. 2012

IEEE Trans. Appl. Supercond.

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Short sample HTS power cable composed of multiple 344C-2G strands and designed to energize a fast-cycling dipole magnet was exposed to a sweeping magnetic field in the (2-20) T/s ramping rate. The B-field orientation toward the HTS strands wide surface was varied from to 8 , in steps of 10. The test arrangement allowed measurements of combined hysteresis and eddy current power losses of the cable assembly. For the validity of these measurements, the power losses of a short sample cable composed of multiple LTS wire strands were also performed and compared with the known data. The test arrangement of the power cable is described, and the test results are compared with the projections for the eddy and hysteresis power losses using fine details of the test cable structures.Index Terms-Accelerator magnets, high temperature superconductors, low temperature superconductors, superconductor power cable.

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“…So far, there are several possible joining techniques presented in literatures [4][5][6][7][8][9][10][11][12][13][14][15], including superconducting joints, non-superconducting joints using a low melting point metal as a soldering material, and diffusion joints. Lots of researches [4][5][6][7][8][9][10][11][12][13][14][15] were focused on how to achieve very small contact resistivity and the good electro-mechanical properties of the joints, while there are few reports on the transport AC loss characteristic in the joints, which is one of the decision factors for future use of the YBCO CC in electric power applications [16][17][18][19][20][21]. In this paper, several soldered joints were fabricated, and the transport AC losses in case of self-field and 77 K were measured.…”

Section: Introductionmentioning

confidence: 99%

Transport AC Losses in Soldered Joint of the YBCO-Coated Conductors

Liu

Zhang

Liu

et al. 2015

J Supercond Nov Magn

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In this paper, we present a direct measurement of the transport AC loss in solder joint of the YBa 2 Cu 3 O 7−xcoated conductor (YBCO CC) at liquid nitrogen temperature. The method is based on measuring the temperature rise of the thermally insulated joint which is fabricated by soldering the YBCO CC samples face to face without removing the metallic stabilizer. The contact resistances in these joints are in the range of 10 to 40 n . It is found that (1) the AC losses in the sample with lap joint dependence of I/I c can be described by use of a third-order power law, where I and I c denote the transport current peak and critical current of the YBCO CC sample, respectively. (2) The loss in sample with joint is greater than that of the original YBCO CC sample in case of I/I c < 0.6, while there are no much in the loss in two kinds of sample when I /I c is in the range from 0.6 to 0.7. Once I/I c > 0.7, the loss in sample with joint is less than that in the original tape.

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Transport AC Losses in YBCO Coated Conductors

Cited by 27 publications

References 3 publications

Study of AC Losses in Superconducting Electrical Components for Electrical System Design

Study of AC Losses in Superconducting Electrical Components for Electrical System Design

A Measurement of HTS Cable Power Loss in a Sweeping Magnetic Field

Transport AC Losses in Soldered Joint of the YBCO-Coated Conductors

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