Liquid dielectric

About: Liquid dielectric is a research topic. Over the lifetime, 3702 publications have been published within this topic receiving 45150 citations.

System and Method for Powering Multiple Electronic Devices Operating Within an Immersion Cooling Vessel

Abstract: An immersion cooling tank comprises: a dielectric liquid disposed within a lower volume of the tank; at least one electronic equipment immersed within the dielectric liquid and which requires electrical power to operate; and at least one power distribution unit and/or a bus bar distribution system submerged beneath a surface of the dielectric liquid and providing electrical power to the at least one electronic equipment. The immersion cooling tank further includes a condenser located vertically above the dielectric fluid and the at least one electronic equipment, and through which is flowing a condensation fluid that has a lower density than the dielectric liquid. A leak of the condensation fluid into the tank volume results in the condensation fluid floating atop the dielectric liquid and prevents the condensation liquid from coming into contact with the power distribution unit. The bus bar distribution system enables blind mating of inserted electronic components.

Effect of Dielectric on Electrical Discharge Machining: A Review

Abstract: In the present study a comprehensive work has been carried out to investigate the influence of dielectric on machining parameters of EDM process. An EDM is a non- traditional thermo- erosive process used to machine a materials irrespective of their hardness. It produced a highly precised and better surface topography in materials. Dielectric is an important parameter in EDM and plays a crucial role in determining high material removal rate (MRR) and surface finish during operation. The dielectric fluid behave as a medium which controls the electrical discharge and absorb heat during process. It remove the debris particles and cool the work-piece. Adding of powder such as Ti, Si, graphite, Cu, Al2O3 etc. in dielectric fluid increases the fluid conductive nature with an increase in micro-hardness of material. Selecting suitable dielectric from different present fluids is highly essential for conducting experiment in EDM. This paper presents the literature views of use of different dielectrics and its effect on optimization of machining parameters and respective characteristic properties.

Streamer formation in perfluoropolyether under impulse conditions

Abstract: A family of perfluorinated fluids that recently has become available, called perfluoropolyethers, contain oxygen in addition to fluorine and carbon and are potentially interesting as electrical insulating fluids. A study of their behavior under electrical pulse conditions is reported. Under the prevailing nonuniform field conditions, the breakdown voltage was lower when the needle was a cathode than when it was an anode. The streamer structures and their inception voltages are studied in some detail. The effect of pressure on the streamer structure is evaluated. >

Vacuum insulator development for the dielectric wall accelerator

Abstract: At Lawrence Livermore National Laboratory, we are developing a new type of accelerator, known as a dielectric wall accelerator, in which compact pulse-forming lines directly apply an accelerating field to the beam through an insulating vacuum boundary. The electrical strength of this insulator may define the maximum gradient achievable in these machines. To increase the system gradient, we use “high-gradient insulators” composed of alternating layers of dielectric and metal for the vacuum insulator. In this paper, we present our recent results from experiment and simulation, including successful testing of a high-gradient insulator in a functioning dielectric wall accelerator cell. Our results indicate that proper high-voltage conditioning of the insulators can delay the onset of flashover, that the observed conditioning consists of both a permanent and a temporary part, and that the insulators’ voltage-holding capability increases with increasing dielectric layer thickness.