NDLI: Bubbles and breakdown of liquid dielectrics

Content Provider	IEEE Xplore Digital Library
Author	Korobeynikov, S.M. Sinikh, Yu.N.
Copyright Year	1998
Description	Author affiliation: Lab. of Electr. Eng. Mater., Novosibirsk State Tech. Univ., Russia (Korobeynikov, S.M.)
Abstract	According to the bubble model the cause of breakdown is the bubbles of micron sizes that exist at electrodes. Several reasons of stationary bubbles existence and emergency on electrodes are discussed. The appearance of "effective" electron in the bubble at short pulses is determined by polar admixtures at electrodes and lead to discharges in it. Emergence of surface and space charge near bubbles poles lead to bubbles deformation due to Coulomb forces. Bubble elongation causes field increase in liquid near bubble poles. Breakdown initiates in liquid phase when this field reaches critical value that depends on the liquid sample and the polarity of initiating electrode. The equation of bubble growth is computed. The basic factors that define electrical strength in model are external factors: the pressure, temperature; properties of liquid: dielectric permittivity, vapour pressure, viscosity, surface tension, density, pulse voltage parameters: the rate of pulse rise, pulse width; properties of liquid-electrode interface that determine charge injection. This performs to compute the well-known breakdown dependencies.
Starting Page	603
Ending Page	606
File Size	548130
Page Count	4
File Format	PDF
ISBN	078034927X
ISSN	1089084X
DOI	10.1109/ELINSL.1998.694865
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dielectric liquids Dielectric breakdown Electrodes Electric breakdown Space vector pulse width modulation Electrons Surface discharges Space charge Equations Temperature
Content Type	Text
Resource Type	Article

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