Design of a cylindrical high-voltage high-temperature vacuum insulator

Author

Pahl, Robert J. ; Shannon, Mark A.

Author_Institution

Dept. of Mech. & Ind. Eng., Illinois Univ., Urbana, IL, USA

Volume

10

Issue

2

fYear

2003

fDate

4/1/2003 12:00:00 AM

Firstpage

240

Lastpage

244

Abstract

A design for a high temperature, HV insulator is presented. This design exploits the temperature dependent thermal and electrical properties of alumina and a unique structural insulator design to increase the high voltage hold-off characteristics of the insulator, reduces thermal flux through the insulator, and alleviate stresses caused by mismatch between insulator and electrode thermal expansion coefficients. The designed insulators insulate graphite electrodes at temperatures approaching 1000°C and potentials up to 50 kV. In this paper, the general methodology of designing these insulators is explored, and some limited performance data is presented.

Keywords

alumina; electrodes; graphite; insulators; thermal analysis; vacuum insulation; 1000 degC; 50 kV; HV insulator; alumina; cylindrical high-temperature vacuum insulator; cylindrical high-voltage vacuum insulator; electrical properties; electrode thermal expansion coefficients; graphite electrodes insulation; high voltage hold-off; structural insulator design; thermal flux reduction; Ceramics; Design methodology; Dielectrics and electrical insulation; Electrodes; Industrial engineering; Mechanical factors; Temperature dependence; Thermal expansion; Thermal stresses; Voltage;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2003.1194105

Filename

1194105