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AC losses of transposed superconductors
IEEE Transactions on Magnetics, 1975Eastham and Rhodes published results of loss measurements on transposed superconducting NbTi cables and concluded basing on an extrapolation to very large numbers of wires that transposed superconductors could be used favourably in cables for power transmission. There are some reasons to question the correctness of their extrapolation.
D. Eckert, G. Enderlein, F. Lange
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AC loss characteristics of coated conductor and the perspective for its AC loss reduction
Physica C: Superconductivity and its Applications, 2005The AC loss characteristics of a coated conductor are determined by the combination of its electromagnetic properties, its geometrical structure, the external magnetic field to which it is exposed, and its transport current. Magnetic fields in a solenoid coil and a one-layer cable are shown as examples of the external magnetic field to which a coated ...
N. Amemiya +5 more
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ac-loss valley in type-II superconductors
Physical Review B, 1992Hysteresis losses W have been calculated as a function of temperature T, bias field ${\mathit{H}}_{\mathit{b}}$, and amplitude ${\mathit{h}}_{0}$ for planar geometry in the critical-state framework with ${\mathit{j}}_{\mathit{c}}$=\ensuremath{\alpha}(T)/${\mathit{B}}^{\mathit{n}}$ for n=0, 1/2, and 1 in the range ${\mathit{H}}_{\mathit{b}}$/${\mathit{h}
, LeBlanc, , LeBlanc
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Losses in AC Superconducting Coils
1989AC superconducting wires are being developed so as to be applied to electrical machineries. The main concerns in developing the AC superconducting wires are AC losses. In order to assess AC losses in the form of winding, we made two AC superconducting coils having different rated capacities, 500kVA and 20kVA.
H. Kasahara +3 more
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AC losses in high-temperature superconductors: revisiting the fundamentals of the loss modelling
Physica C: Superconductivity, 1998The fundamentals of the electromagnetic modelling of high-temperature superconductors are discussed. Special attention is paid to intrinsic features of high-temperature superconductors different to those of low-temperature superconductors. Examples of those features are strong thermal fluctuations, which results in enhanced flux creep and slanted E(J ...
Paasi, Jaakko, Lahtinen, Markku
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Journal of Applied Physics, 1968
Since the discovery of technologically interesting high-field superconductors in 1961 more than 50 experimental and theoretical publications have appeared which are concerned with the relevant ac loss mechanisms. These papers are reviewed, and certain of the experimental findings are unified in the light of the present day understanding.
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Since the discovery of technologically interesting high-field superconductors in 1961 more than 50 experimental and theoretical publications have appeared which are concerned with the relevant ac loss mechanisms. These papers are reviewed, and certain of the experimental findings are unified in the light of the present day understanding.
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AC loss in energy doubler magnets
IEEE Transactions on Magnetics, 1979A computerized ac loss measurement system was developed and more than 50 magnets were measured. The ac losses were very much dependent on various factors such as conductor surface and pressure applied to coil windings. Statistical correlation between quench current and ac loss will be shown.
M. Wake +3 more
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AC loss characteristics of layered insulated low AC resistive conductor
2018 12th International Conference on the Properties and Applications of Dielectric Materials (ICPADM), 2018In this paper, a round tight pressure conductor with large cross-section based on layered insulating structure is proposed. Compared to the existing common conductors, the 1800mm2 new conductor with the same cross section can reduce the AC / DC resistance ratio 15% and meet the conductor appearance requirements, without changing the interface state and
Liexiang Hu +6 more
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AC losses in reversible niobium
Cryogenics, 1972Abstract Losses at 4.2 K in a cylinder of magnetic reversible niobium subjected to a sinusoidal magnetic field within a frequency range of 20–260 c s −1 are reported as well as waveforms related to the penetration of magnetic flux. The observed phenomena are interpreted by considering both the shielding of the bulk by currents at the surface and the
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1994
The main issues in the research on ac losses in practical superconductors and the developments of the last decade are reviewed. Moreover the impact of the knowledge on the development of superconducting magnet systems as for tokamaks and particle accelerators is discussed.
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The main issues in the research on ac losses in practical superconductors and the developments of the last decade are reviewed. Moreover the impact of the knowledge on the development of superconducting magnet systems as for tokamaks and particle accelerators is discussed.
openaire +2 more sources