Title :
High temperature studies of perfluoroalkoxy (PFA) film [for HV capacitors]
Author :
Suthar, J.L. ; Laghari, J.R.
Author_Institution :
Space Power Insulation Inst., State Univ. of New York, Buffalo, NY, USA
fDate :
29 Oct-2 Nov 1989
Abstract :
Teflon perfluoroalkoxy (PFA) film was characterized electrically to explore the possibility of its use for high-temperature high-voltage capacitors for space applications. The properties measured at temperatures up to 250°C included the AC breakdown voltage and the dielectric constant and dissipation factor at frequencies up to 100 kHz. To understand the breakdown mechanism taking place at these higher temperatures, the prebreakdown conduction currents were also monitored. The results show a drastic reduction in the dielectric strength, as well as an increase in dissipation factor and conduction current with increasing temperature. The results are explained in light of the breakdown models available
Keywords :
dielectric losses; electric breakdown of solids; electric strength; organic insulating materials; permittivity; polymer films; power capacitors; 20 to 250 C; 50 Hz to 100 kHz; AC breakdown voltage; Teflon; breakdown mechanism; breakdown models; dielectric constant; dielectric strength; dissipation factor; high-temperature high-voltage capacitors; perfluoroalkoxy film; prebreakdown conduction currents; space applications; Capacitors; Dielectric breakdown; Dielectric constant; Dielectric measurements; Dielectrics and electrical insulation; Electric breakdown; Space heating; Temperature distribution; Temperature measurement; Thermal stresses;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1989. Annual Report., Conference on
Conference_Location :
Leesburg, VA
DOI :
10.1109/CEIDP.1989.69595
