ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Positive temperature coefficient resistors are evaluated in the self-heating mode as pulse generators and as opening switches in inductive storage pulse power supplies. Results from both carbon-filled polymer devices, as well as from barium-titanate-based devices, are shown. Theoretical switched powers of close to a 1/4 MW are calculated for honeycomb-shaped BaTiO3 positive temperature coefficient resistors. Switching times in the millisecond range are achieved. Pulse duration varies with ambient temperature, but this can be counteracted by using capacitative triggering. Surface flashover was one of the critical failure mechanisms. The results point towards further improved device designs.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.337953
