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This paper presents the design method using topology optimization and the fabricating feasibility using Fused Deposition Modeling (FDM) 3D printing technique for Functionally Graded Material (FGM) insulator. The concepts of FGM and topology optimization are primarily introduced. And a topology optimization approach based on COMSOL Multiphisics is proposed. The optimization objective is to uniform...
As an alternative insulating liquid of mineral oil, the silicone oil is widely used in the high voltage apparatuses where fireproofing and environment must be considered. Both the thermal aging and moisture threaten the reliability of the oil-paper insulating system. As a nondestructive measurement method, the frequency domain spectroscope (FDS) property of the electric apparatus has been used to...
In order to get polymeric materials with tunable dielectric permittivity, epoxy composites filled with the combination of micro-size alumina and barium titanate particles were prepared. In this paper, firstly appropriate surface modification method for the inorganic fillers employing silane coupling agent (KH550) was experimentally selected. Then, epoxy resin based composites were prepared with BaTiO...
The application of Functionally Graded Material (FGM) in the solid insulation of high voltage apparatus is discussed. Firstly, the concept of FGM and its effect on electric field (E-field) optimization is introduced. Secondly, optimization of permittivity FGM (e-FGM) insulator is studied. A numerical technique for the optimization of permittivity distribution in e- FGM spacer is proposed and simulated...
Surface discharge on dielectric materials seriously restricts the performance of many electrical and electronic systems. Based on Pockels electro-optic effect, the surface discharge on polymeric insulating materials has been investigated under HVAC in Atmospheric Air. Different polymer materials such as polyimide (PI), polyethylene terephthalate (PET) and polyvinylidene fluoride (PVDF) films are employed...
Surface flashover in vacuum is a kind of important physical phenomena. Considerable work has been done on the effects of insulating material on its surface flashover characteristics, i.e. the dielectric permittivity, conductivity, surface roughness, surface trap distribution and so on. For general insulator material, its permittivity is constant, which brings many disadvantages. On the condition of...
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