Conference paper
Heat dissipation improvement for ZnO based varistors
ZnO based varistors are today frequently used for making state of the art surge arresters for all voltage levels, due to some advantages like a high non-linearity coefficient and a high energy absorption capacity. Due to their thermal activated conduction, the heat dissipation inside that semiconductor device is crucial for its service.
Heat dissipation study could be done only by modelling the thermal and electrical status of the varistor in case of some special and original configurations. The new configuration proposed in this paper consists in a disc varistor with an additional brass mass used for heat extraction and dissipation.
The structure is suitable for medium and high voltage metal oxide based surge arresters. This paper presents the finite-element model used for the direct control of heat dissipation, some predictions concerning temperature in different points of the device in steady and shock regime, as well as some experimental results.
Language: | English |
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Year: | 2010 |
Pages: | 1-6 |
Proceedings: | 2010 14th International Conference on Harmonics and Quality of Power (ICHQP) |
ISBN: | 142447244X , 142447244x , 1424472458 , 1424472466 , 9781424472444 , 9781424472451 and 9781424472468 |
Types: | Conference paper |
DOI: | 10.1109/ICHQP.2010.5625360 |
Electric shock Heating II-VI semiconductors Materials Stability analysis Temperature measurement Thermal stability Varistors ZnO ZnO Varistors absorption arresters brass mass cooling disc varistor finite-element model heat dissipation heat extraction high energy absorption capacity high voltage metal oxide based surge arresters nonlinearity coefficient semiconductor device thermal activated conduction thermal modelling varistors wide band gap semiconductors zinc compounds