Estudo, projeto e construção de resistores para aplicação em um gerador de impulsos de tensão.

Abstract

The goal of this final year project was to study different types of resistors used in high power applications, and to design and build replacement resistors for the impulse generator of the High Voltage Laboratory (LAT) at UFCG. The blueprint for the building of all the resistors for this equipment is presented, in order to replace not only those which are currently damaged, but also those which may need to be replaced in the future. The methods used in this project can be applied to the design of wire-wound resistors in general. The resistors' design was based on Ayrton-Perry's winding method, in order to produce non-inductive wire-wound resistors. The choice of the resistive wire was made based on the comparison of the main alloys used in wire-wound resistors, and also based on the availability of these alloys in the laboratory at UFCG. The viability of the project was verified through the construction of the front resistor, using the Electrical Engineering Department's tools and equipments. Tests were conducted on the front resistor regarding its resistance, inductance, power and temperature, the latter measured using a thermal camera. The tests showed satisfactory results, which meet the specifications required by the impulse generator at LAT.