Test results of 14 kVA superconducting transformer with Bi-2223/Ag windings

Single phase 14 kVA, 400 V/200 V superconducting transformer with Bi/2223/Ag winding immersed in liquid nitrogen and with laminated ferromagnetic core was designed and manufactured. The core of the transformer was at room temperature, both windings were placed in a nonmetallic toroidal cryostat. The...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2003-06, Vol.13 (2), p.2310-2312
Main Authors: Jelinek, Z., Timoransky, Z., Zizek, F., Piel, H., Chovanec, F., Mozola, P., Jansak, L., Kvitkovic, J., Usak, P., Polak, M.
Format: Article
Language:English
Subjects:
Alternating current
Applied sciences
Bismuth
Circuit testing
Coils (windings)
Critical current
Current measurement
Electrical engineering. Electrical power engineering
Exact sciences and technology
Ferromagnetism
LAMINATES
Load tests
Loss measurement
MAGNETIC FIELD
Magnetic field measurement
Magnetic fields
MAGNETIC PROPERTIES
Manufacturing
Materials
Nitrogen
R&D
Research & development
Silver
Studies
SUPERCONDUCTIVITY
SUPERCONDUCTORS
Temperature
Transformer cores
TRANSFORMERS
WINDING
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Single phase 14 kVA, 400 V/200 V superconducting transformer with Bi/2223/Ag winding immersed in liquid nitrogen and with laminated ferromagnetic core was designed and manufactured. The core of the transformer was at room temperature, both windings were placed in a nonmetallic toroidal cryostat. The aim of the work was to verify the calculated values of critical currents and AC losses in primary and secondary windings which were based on short sample measurements. Standard short circuit test, open circuit test and load test were performed and evaluated. To reduce AC losses of primary and secondary winding laminated ferromagnetic rings attached to both ends of the windings were designed. Their influence on the radial magnetic field component in the windings was computed. The resulting effect of the rings on AC losses was verified experimentally. The issue of AC losses is discussed in another contribution of these proceedings. The residual basic parameters are presented here.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2003.813104