Results 301 to 310 of about 2,252,616 (352)

An Analysis of AC loss of Bi-2212 CICC

2018 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD), 2018
With the development of magnetic confinement fusion research, more and more stronger magnetic fields are needed. Commonly used superconductor of Nb3Sn in high-field magnets which does not have much potential for improvement. We need to develop conductor with new superconducting materials. Bi2Sr2CaCu2Ox is such a promising material.
Yuxiang He, Jinggang Qin, Fang Liu, Chao Dai   +3 more
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Review on AC losses in superconductors

IEEE Transactions on Magnetics, 1981
Paper presents principal results obtained during the last years in the research of AC losses in superconductors with regard to the magnet technology. Special emphasis is given on these aspects which are important in demonstrating the technical feasibility and economical advantages of AC superconducting windings. In the domain of hysteresis losses paper
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Loss phenomena in the AC quantum Hall effect

IEEE Transactions on Instrumentation and Measurement, 2001
We investigated the ac quantum Hall effect of several GaAs-based samples. The influence of temperature, current, and frequency was measured for the plateaux i=2. Some measurements of the plateaux i=4 were performed to determine the scaling behavior with respect to i.
Jürgen Schurr, Jürgen Melcher, Aurel von Campenhausen, Klaus Pierz, Günter Hein, Franz-Josef Ahlers   +5 more
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Measurement of AC insulation losses at cryogenic temperatures

1976 IEEE International Conference on Electrical Insulation, 1976
The design of superconducting transmission cables requires a systems approach which includes consideration of the conductor, insulator, cryogenic envelope and refrigerator. Each component of the system must function satisfactorily without disrupting the other system elements.
William E. Anderson, Richard S. Davis
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AC Losses and Magnet Research

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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ac-loss valley in type-II superconductors

Physical Review B, 1992
Hysteresis 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

1989
AC 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, S. Akita, T. Ishikawa, T. Tanaka   +3 more
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Comparison of calculated and measured losses in direct AC-AC converters

2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230), 2002
This paper is concerned with modelling, predicting and experimental measurement of semiconductor losses in direct AC-AC (matrix) converters. All of the commutation scenarios possible in a matrix converter topology using two or four step commutation are identified and studied.
M. Bland, P. Wheeler, J. Clare, L. Empringham   +3 more
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AC losses in reversible niobium

Cryogenics, 1972
Abstract 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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AC Losses in Hard Superconductors

1963
Fagan[1], McFee[2], and others have suggested the possibility of building transformers, transmission lines, rectifiers, rotating equipment, and other ac power equipment using superconductors. The practicability of many of these devices depends on the feasibility of producing superconductors that will carry high ac current densities at high ac magnetic ...
C. H. Jones, H. L. Schenk
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