Results 231 to 240 of about 9,317 (278)

Silicon–Aluminum Phase-Transformation-Induced Superconducting Rings

Nano Letters, 2022
The development of devices that exhibit both superconducting and semiconducting properties is an important endeavor for emerging quantum technologies. We investigate superconducting nanowires fabricated on a silicon-on-insulator (SOI) platform. Aluminum from deposited contact electrodes is found to interdiffuse with Si along the entire length of the ...
Brett C. Johnson, Michael Stuiber, Daniel L. Creedon, Manjith Bose, Amanuel Berhane, Laurens Henry Willems van Beveren, Sergey Rubanov, Jared H. Cole, Vincent Mourik, Alexander R. Hamilton, Timothy L. Duty, Jeffrey Colin McCallum   +11 more
openaire   +3 more sources

Power Transformer With Superconducting Windings

[1993] Digests of International Magnetics Conference, 1993
A 330-kVA power transformer with superconducting windings is discussed. A niobium-titanium based superconducting wire optimized for AC applications was used in the windings. The transformer worked according to its design at rated power. The total heat input to the liquid helium bath at this power was 9.4 W, of which the AC losses dissipated in the ...
S. Hornfeldt, O. Albertsson, D. Bonmann, F. Konig   +3 more
openaire   +1 more source

Quench protection of superconducting transformers

IEEE Transactions on Magnetics, 1991
Protection of superconducting transformers from the quench caused by excess fault current was studied theoretically with the aid of a simple equivalent circuit model which was composed of leakage inductance and resistances of the conductor. The authors distinguished the resistance in the flux-flow state from that in the normal state, and basic ...
M. Iwakuma, K. Funaki, M. Takeo, K. Yamafuji   +3 more
openaire   +1 more source

Considerations about HTS superconducting transformers

IEEE Transactions on Appiled Superconductivity, 2001
A superconducting transformer brings savings in weight, loss and to a lesser degree, in volume. A transformer uses a magnetic circuit in order to decrease the no-load current. The magnetic circuit can operate either at the same temperature than the superconducting windings or at room temperature.
G. Donnier-Valentin, P. Tixador, E. Vinot   +2 more
openaire   +1 more source

Inrush Current of Superconducting Transformer

IEEE Transactions on Applied Superconductivity, 2013
Inrush current in superconducting transformers is a little-known phenomenon. Because of its high values and long time, it may lead to loss of superconductivity in transformer's windings. In the article, we present results of inrush current measurements in two superconducting transformers of the same power but different winding geometries.
G. Wojtasiewicz, G. Komarzyniec, T. Janowski, S. Kozak, J. Kozak, M. Majka, B. Kondratowicz-Kucewicz   +6 more
openaire   +1 more source

Superconductive chirp-transform spectrum analyzer

IEEE Electron Device Letters, 1985
Spectral analysis over an instantaneous bandwidth of 2.4 GHz has been demonstrated utilizing superconductive dispersive delay lines in a chirp-transform configuration. Two-tone resolution of 43 MHz and ±1.2-dB amplitude uniformity were achieved.
R.S. Withers, S.A. Reible
openaire   +1 more source

Superconducting coaxial turn transformer

Cryogenics, 1990
Abstract The concept of a superconducting coaxial turn transformer is presented. The turns enclose each other like hoses and the circularly wound warm iron core encloses the coils outside the cryostat. This concept promises some remarkable advantages over other geometries.
openaire   +1 more source

Superconductive windings in power transformers

Journal of the Institution of Electrical Engineers, 1963
The superconducting elements exclude all magnetic field from their bulk and restrict conduction within a few hundred angstroms of their surface, but there are alloys in which d.c. superconduction occurs in depth. The paper examines the electromagnetic behaviour of both these forms of superconductor, and includes a description of the loss mechanism in ...
openaire   +2 more sources

630kVA high temperature superconducting transformer

Cryogenics, 1998
This document describes the 630 KVA HTS transformer project made by ABB jointly with EDF and ASC. The project started April 1994 and its goal was to manufacture a real scale superconducting distribution transformer and to operate it during one year in the grid of Geneva's utility (SIG).
openaire   +1 more source

Precise superconducting DC ratio transformer

Journal of Physics E: Scientific Instruments, 1973
An improved design for a precise superconducting DC ratio transformer is described in which DC ratios with accuracies better than 0.01 ppm have been achieved.
openaire   +1 more source