Ivanilov V. Improvement of securing methods r intrinsically safe electric circuits of mine electrical equipment with chemical current sources

The thesis solves a scientific and technical task in the field of explosion protection of mine electrical equipment with chemical current sources and safety in mines, which is a very important issue for the coal industry of Ukraine. The thesis has established for the first time that intrinsic safety of electric circuits of mine electrical equipment with chemical current sources results from parameters of their active and reactive resistance components determining an intrinsically safe value of load current output for chemical current sources. Further developments have been introduced into a mathematical model of short-circuit current for chemical current sources in parameters of impedance components. The proposed mathematical model allows take into consideration parameters of impedance components for chemical current, which are determined analytically, without any experiments. For the first time, analytical dependences have been established for the influence of parameters of safety transistors on intrinsic safety of electric circuits not only in the static mode of load but also in the transient mode of operation. Main scientific and practical results have been included into "Operational methods of testing intrinsic safety of electrical equipment with such a type of explosion protection as "intrinsically-safe electric circuit", "Methods of determining internal impedance components and short-circuit currents for chemical current sources", and also used during the development of mine headlamps СВГ-1 (SVG-1), ЛУЧ-Р (LUCH-R), methane alarm СМС-5 (SMS-5), and "Equipment for wireless communication in mine workings and between mine workings and mine surface at a distance of up to 10 km". Certain socioeconomic effect has been achieved in the coal industry of Ukraine after implementing the thesis results. Key words: chemical current sources, mine electrical equipment, explosion protection, transient processes, intrinsically safe, voltage, socioeconomic effect