Roziskulov S. Interdependent transients in circuits of electric discharge installations with controlled semiconductor switches.

. The object of research is the discharge circuits of the formers of discharge currents of controlled duration in the technological load, which use modern controlled semiconductor switches to regulate the parameters of currents over time. Purpose of the work: development of the theory of interconnected transient processes of current increase and current drop in the load circuit of electric discharge installations with controlled semiconductor switches by improving methods for calculating and regulating such processes, taking into account changes in the circuit structure and dynamic parameters of the discharge current. Research methods are based on the fundamental principles of theoretical electrical engineering, the theory of transients in linear electrical circuits, mathematics, modeling. The results obtained using analytical methods and computer modeling are confirmed by their comparison and convergence with the results obtained during physical experiments. Theoretical and practical results and novelty: an important scientific task of the development of the theory of interdependent transient processes of current changes in the load circuit of electric discharge installations with controlled semiconductor switches and reservoir capacitors has been solved by improving the methods for calculating and regulating such processes, taking into account the rapid changes in the structure of the load circuit and the dynamic parameters of the discharge current. The regularities of an increase in the dynamic characteristics of electric discharge installations with a simultaneous decrease in the quality factor of the discharge circuit of a reservoir capacitor and a forced limitation of the rise time of its discharge current are revealed and confirmed. It is developed a method for the analysis of interconnected transient processes in the circuits of the variable structure of electric discharge installations in terms of obtaining and solving difference equations for the cyclic processes of current rise and current drop in the load, its modeling with an equivalent active resistance and the determination and regulation of limit and time intervals in accordance with the specified dynamic characteristics of pulse currents in the load. The method for increasing the dynamic characteristics of the discharge current in the load of electric discharge installations has been improved by introducing controlled semiconductor current switches into their discharge circuits and implementing the algorithms for coordinated changes in the structure of these circuits during the current drop in the load and when charged reservoir capacitors are connected to them. Subject and degree of implementation: practical results of the work have been implemented at the Institute of Electrodynamics and the Institute of Gas of the National Academy of Sciences of Ukraine, the Institute for the Development of Territorial Communities of Ukraine, the Yuzhcable Works PJSC (Kharkov), as well as in the educational process of the Department of Theoretical Electrical Engineering of NTUU "Igor Sikorsky Kyiv Polytechnic Institute". Implementation efficiency: the obtained theoretical and practical results made it possible to obtain pulsed currents of controlled duration with increased dynamic characteristics in the technological load of electric discharge installations. Scope of use: further use of scientific and practical results on the regulation of pulse power and the rate of rise of discharge currents of storage capacitors in circuits with semiconductor switches and nonlinear load is advisable to be carried out at the Institutes of the National Academy of Sciences of Ukraine (Institute of Electrodynamics, E.O. Paton Electric Welding Institute, G. V. Kurdyumov Institute for Metal Physics, Institute of pulse processes and technologies), as well as in educational processes in NTUU "Igor Sikorsky Kyiv Polytechnic Institute" and at the National University of Shipbuilding named after adm. Makarov (Mykolaiv).