Results 311 to 320 of about 644,438 (353)

Experimental Studies of a High-temperature Superconducting Prototype Transformer with Current Limiting Function

2020 International Youth Conference on Radio Electronics, Electrical and Power Engineering (REEPE), 2020
The discovery of high-temperature superconductivity (HTS) is one of the most promising trends for the designing of electrical equipment. This paper presents experimental studies of the main electrical parameters of the developed prototype transformer ...
D. Ivanov, V. Manusov, A. Semenov
semanticscholar   +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).
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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

Thermal Analysis of Superconducting Traction Transformer

2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, 2008
The paper deals with thermal analysis of the superconducting single-phase high temperature superconductivity (HTS) traction transformer. The purpose is to investigate a thermal distribution of a heat in a cryogen with liquid nitrogen using a FEM software and program Fluent.
V. Hrabovcova, P. Rafajdus, M. Vojenciak, M. Susota   +3 more
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Development and application of superconducting transformers

Physica C: Superconductivity, 2002
Superconducting 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, B. Gromoll, J. Rieger, M. Oomen, H.-W. Neumüller, R. Schlosser, H. Schmidt, W. Knorr, M. Meinert, U. Henning   +9 more
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Waveform transformation using shaped superconducting films

Review of Scientific Instruments, 1997
This article describes a procedure to arrive at a current controlled resistor, based on superconducting films for converting a sinusoidal current waveform of a certain magnitude into a triangular voltage waveform. As an example, it describes a resistor for converting a current of 180 μA into a triangular voltage of 22 mV.
Narayana, Badri T, Satyam, M
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Current Limitation Experiments on a 1 MVA-Class Superconducting Current Limiting Transformer

IEEE transactions on applied superconductivity, 2019
We designed, built, and tested a single phase 577 kVA transformer demonstrator, optimized for high current limiting capability and low loss operation. The transformer demonstrator consists of a conventional warm iron core and a normal conducting primary ...
S. Hellmann, M. Abplanalp, S. Elschner, A. Kudymow, M. Noe   +4 more
semanticscholar   +1 more source

Superconducting self-resonant air-core transformer

2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018), 2002
This paper presents a concept of an air-core transformer using superconducting and self-resonant techniques. Its magnetic property is examined here. Experimental results are used to verify the theoretical prediction. This transformer is important for future conversion and its applications are for elimination of the core and reduce the power loss and ...
H.L. Chan, K.W.E. Cheng, D. Sutanto
openaire   +1 more source

Electromagnetic Design of High-Temperature Superconducting Traction Transformer for High-Speed Railway Train

IEEE transactions on applied superconductivity, 2019
A 6.6 MVA traction transformer made of high-temperature superconducting (HTS) wire is proposed in this design. The magnetic field, losses, and impedance are evaluated by finite element analysis.
Xiaohang Li, Jingyin Zhang, Kaite Huang, Xiuhua Song, Jin Fang   +4 more
semanticscholar   +1 more source