The article presents the experimental results of research works aimed at manufacturing photoconductive semiconductor switches (PCSSs) on semi-insulating (SI) gallium phosphide (GaP) wafers. The PCSS is an electrical switch, triggered into the conduction state by means of an optical pulse with specific photon energy. The switches presented in the paper are developed for the applications in power systems and high-pulse voltage generators. The paper presents time courses of the photocurrent being a response to the excitation of semiconductor material with an optical pulse that generates excess charge carriers. The effect of laser beam photon energy on the height and time constant of photocurrent pulses was determined. The results of measurements of photocurrent in the conduction state for various values of electric field strength are presented. The research methodology was discussed and the measuring system used was described. Possible directions of further research were also presented. The research was carried out thanks to the cooperation of scientific teams from the Military University of Technology (WAT) and the Institute of Electronic Materials Technology (ITME).
KEYWORDS: Data modeling, Temperature metrology, Copper, Systems modeling, Thermal modeling, Modeling, Resistance, Electronic components, Safety, Control systems
The article discusses a phenomenon of heat exchange between the environment and an electrical cable in temperature conditions exceeding the permissible values for commonly used non-flammable electrical cables. The method applying the thermal diffusivity coefficient of electrical cable structural elements was used for the model, which constitutes own research contribution of the author into studying the thermal phenomena in electrical cables. The correctness of the results generated by the developed temperature model was verified based on the experimental data obtained from an individually designed and constructed test stand. Comparing the proposed solution with experimental data has proven its usefulness for the adopted modelling purpose.
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