Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Uno Gafvert"'
Autor:
Uno Gafvert, Birgitta Källstrand, D. Emilsson, Kenneth Johansson, Lars Walfridsson, Daniel Borg
Publikováno v:
2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0056c9e5feea291c1d531175c8381ad
https://doi.org/10.1109/ceidp.2014.6995825
https://doi.org/10.1109/ceidp.2014.6995825
Publikováno v:
2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena.
Corona currents in air measured in a large scale coaxial geometry (d outer = 1 m, d inner = 0.26 mm), under both DC and AC voltages of a triangular shape with frequencies in the range (1–50) Hz are analyzed. A computational model describing dynamic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23f5c2de1e9cc46ac484fbb990fde85f
https://doi.org/10.1109/ceidp.2012.6378794
https://doi.org/10.1109/ceidp.2012.6378794
Publikováno v:
2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03a3a5bb6e5283f71abd3d551540cc78
https://doi.org/10.1109/ceidp.2011.6232616
https://doi.org/10.1109/ceidp.2011.6232616
Publikováno v:
2011 IEEE International Conference on Dielectric Liquids.
The electrical insulation system of power transformers is a combination of mineral oil and pressboard materials. We have measured the influence of forced oil flow on the electric field stress in oil pressboard insulation system with applied DC potent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35a64b9775a50ba6054e513c1ffcbf01
https://doi.org/10.1109/icdl.2011.6015451
https://doi.org/10.1109/icdl.2011.6015451
Publikováno v:
2010 Annual Report Conference on Electrical Insulation and Dielectic Phenomena.
Knowledge of the external field distribution around high voltage apparatus is of vital importance. As a part of the effort to improve the physical understanding of the DC field distribution outside high voltage apparatus, a small probe that can measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32082427257808ac31d0814b6e63573b
https://doi.org/10.1109/ceidp.2010.5723964
https://doi.org/10.1109/ceidp.2010.5723964
Publikováno v:
2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena.
In this paper we report on basic studies of the electric fields under dc stress in a composite insulation consisting of transformer oil and oil-impregnated pressboard, typical for HVDC converter transformers. The time dependent electrical fields in o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4431e8763a58fc525a2fffd2e2ff4d2f
https://doi.org/10.1109/ceidp.2006.312084
https://doi.org/10.1109/ceidp.2006.312084
Autor:
Tommaso Auletta, Francis O'Sullivan, Rongsheng Liu, A. Jaksts, Il-Han Park, Se-Hee Lee, Leif A. A. Pettersson, Uno Gafvert, Markus Zahn, Olof Hjortstam
Publikováno v:
2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena.
Unipolar and bipolar space charge injection and propagation is analyzed under simplified linear and Fowler-Nordheim charge injection conditions for parallel plane or needle-sphere electrodes stressed by a step voltage. To verify our finite element nu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21de21c42986a5f52b928e2d37c03c89
https://doi.org/10.1109/ceidp.2006.312078
https://doi.org/10.1109/ceidp.2006.312078
Autor:
Francis O'Sullivan, Olof Hjortstam, Rongsheng Liu, Tommaso Auletta, Uno Gafvert, Se-Hee Lee, Markus Zahn, Leif A. A. Pettersson
Publikováno v:
2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena.
Transformer oil is one of the most important and widely used of all dielectric liquids. Significant research into the insulating properties of transformer oil has been carried out. Much of this work has focused on the development of streamers, and ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de6ef069367de02f93ac37d797a7e98d
https://doi.org/10.1109/ceidp.2006.312042
https://doi.org/10.1109/ceidp.2006.312042
Autor:
Uno Gafvert
Publikováno v:
Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1982.
Particle- and oil motion has been studied both in a bare metal gap and with electrodes covered with epoxy. Oil motion, probably due to ion injection from the electrodes, was observed at an AC field strength from 3 kv/mm with bare metal electrodes and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69522ce1c01e9ade6af1d9f0f58a7a3b
https://doi.org/10.1109/ceidp.1982.7726570
https://doi.org/10.1109/ceidp.1982.7726570
Publikováno v:
Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1985.
Questions concerning space charge and electric field distribution are of great importance for the understanding and development of practical insulation systems.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b457f156ad5b57a38bc1a8d1df14362
https://doi.org/10.1109/ceidp.1985.7728132
https://doi.org/10.1109/ceidp.1985.7728132