Electric field control in coaxial disk-type solid insulator by functionally graded materials (FGM)

2014 ◽  
Author(s):  
J. Ishiguro ◽  
M. Kurimoto ◽  
H. Kojima ◽  
K. Kato ◽  
H. Okubo ◽  
...  
Keyword(s):  
Electric Field ◽  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Graded Materials ◽  
Field Control ◽  
Solid Insulator ◽  
Coaxial Disk

Functionally Graded Polymeric Composites Having Micro-Tailored Structure Formed by Electric Field

Materials ◽  
2003 ◽  
Author(s):  
Geun Hyung Kim ◽  
Daniel K. Moeller ◽  
Yuri M. Shkel
Keyword(s):  
Mechanical Properties ◽  
Electric Field ◽  
Functionally Graded Materials ◽  
Applied Electric Field ◽  
Polymeric Composites ◽  
Functionally Graded ◽  
Graded Materials ◽  
Functionally Graded Composites ◽  
Liquid Suspensions ◽  
Redistribution Effect

A solid composite having locally micro-tailored structure can be produced by curing liquid polymeric suspensions in an electric field. The redistribution effect of the field-induced forces exceeds the effect of centrifugation, presently employed to manufacture functionally graded materials. Moreover, unlike centrifugational sedimentation, one can electrically rearrange the inclusions in desired targeted areas. The applied electric field can be employed to produce a composite having uniformly oriented structure or only modify the material in selected regions. This technology enables polymeric composites to be locally micro-tailored for given design objectives. We discuss electrical and rheological inteactions in liquid suspensions. Relationships between microstructure and mechanical properties of the obtained functionally graded composites are presented.

scholarly journals Functionally Graded Materials (FGM) for Spacers in Gas Insulated Systems: A Concise Review and Some Comments

2021 ◽  
Vol 11 (6) ◽  
pp. 7887-7891
Author(s):  
K. L. Wong ◽  
M. Danikas
Keyword(s):  
Electric Field ◽  
Functionally Graded Materials ◽  
High Voltage ◽  
Electric Field Distribution ◽  
Industrial Applications ◽  
Functionally Graded ◽  
Graded Materials ◽  
Concise Review ◽  
Viable Solution ◽  
Future Challenges

Functionally Graded Materials (FGMs) present a solution to control electrical stresses in high voltage applications. In this paper, a concise review is presented on the FGMs for spacers in gas-insulated systems. FGMs offer the possibility of a more even electric field distribution and thus a viable solution for industrial applications. FGMs are investigated here primarily as materials for permittivity control. Some aspects of FGMs are discussed as well as some thoughts on future challenges.

Application of Functionally Graded Materials for Solid Insulator: Fabrication, Optimization Design, and Surface Flashover of Prototype Samples

2013 ◽  
Vol 291-294 ◽  
pp. 2308-2312 ◽  
Author(s):  
Nan Li ◽  
Ji Huan Tian ◽  
Wei Deng ◽  
Hui Gang Sun
Keyword(s):  
Functionally Graded Materials ◽  
Optimization Design ◽  
Functionally Graded ◽  
Dielectric Constants ◽  
Layer By Layer ◽  
Graded Materials ◽  
Casting Technique ◽  
Surface Flashover ◽  
Solid Insulator ◽  
Lightning Impulse

The applicability of functionally graded materials (FGM) for solid insulator of gas insulated switchgear (GIS) was investigated. First, a new fabrication method based on layer-by-layer casting technique was demonstrated to prepare FGM insulator possessing spatial distribution of dielectric constants. Then, electric field strength in the FGM spacer model was calculated and optimized by using finite element method (FEM). Three types of truncated cone spacers were fabricated according to the optimization results. Finally, surface flashover tests were performed under AC voltage and lightning impulse voltage applications. Results in both circumstances indicated an evident improvement of flashover voltage when FGM insulator was employed. As a result, we verified the fabrication technique and the applicability of FGM insulator for enhancement of insulation performance in GIS device.

Dynamic Analysis with Stress Recovery for Functionally Graded Materials: Numerical Simulation and Experimental Benchmarking

2014 ◽  
Vol 2 (1) ◽  
pp. 21
Author(s):  
Carlos Alberto Dutra Fraga Filho ◽  
Fernando César Meira Menandro ◽  
Rivânia Hermógenes Paulino de Romero ◽  
Juan Sérgio Romero Saenz
Keyword(s):  
Numerical Simulation ◽  
Dynamic Analysis ◽  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Stress Recovery ◽  
Graded Materials
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