Results 201 to 210 of about 527 (251)
Some of the next articles are maybe not open access.
Inrush Current of Superconducting Transformer
IEEE Transactions on Applied Superconductivity, 2013Inrush 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 +2 more
exaly +2 more sources
Transforming transformers [superconducting windings]
IEEE Spectrum, 1997Use of high-temperature superconducting (HTS) windings may soon turn power transformers into compact high-performers on good terms with the environment. The potential for HTS transformers is being examined in major design and hardware development programs by several teams of engineers and scientists worldwide.
S.P. Mehta, N. Aversa, M.S. Walker
openaire +1 more source
Power Transformer With Superconducting Windings
[1993] Digests of International Magnetics Conference, 1993A 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 +3 more
openaire +1 more source
Development and application of superconducting transformers
Physica C: Superconductivity, 2002Superconducting transformers are an important innovation for future power transmission and transportation systems. Powerful, lightweight, energy-saving and environmentally friendly they offer enormous benefits compared to their conventional counterparts.
M. Leghissa +9 more
openaire +1 more source
Quench protection of superconducting transformers
IEEE Transactions on Magnetics, 1991Protection 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 +3 more
openaire +1 more source
Superconductive windings in power transformers
Journal of the Institution of Electrical Engineers, 1963The 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
A study on a coreless superconducting transformer
IEEE Transactions on Applied Superconductivity, 1993A conceptual design for a 1000-MVA-class coreless superconducting autotransformer (CLSCAT) has been developed. For a preliminary experimental study, a small 2.5-kVA CLSCAT has been manufactured and tested. The test result shows that though the exciting current of the CLSCAT is very large, its voltage drop is relatively small compared with the cored ...
M. Yamamoto +3 more
openaire +1 more source
Superconductivity and structural transformation in HfRuAs
Physics Letters A, 1983Abstract HfRuAs exists in two structural modifications. The high-temperature phase (ZrRuSi-type structure) exhibits superconductivity at 4.93-4.37 K, whereas the low-temperature phase (TiFeSi-type superstructure) remains normal at 1 K. The lattice distortion giving rise to the superstructure indicates zig-zag chains of metal atoms are crucial to ...
openaire +1 more source