Analysis of energy characteristics of a transistor pulse generator in the process of electric spark dispersion of current-conductive granular media
DOI:
https://doi.org/10.20998/2074-272X.2025.5.10Keywords:
energy characteristics, electric spark dispersion, transistor pulse generator, cylindrical electrode system, layer of metal granules, ohmic contact currentAbstract
Introduction. Studies of electrophysical and technological aspects of electric discharge in reaction chambers with granular metal loading to obtain its highly dispersed states have been conducted for many decades, however, the power sources of electric spark dispersion installations today remain mainly classical in terms of the method of generating current pulses on the electric spark load. The main problem of using powerful current pulse generators and reaction chambers with a plane-parallel electrode system is to imitate the principle of the thermo-explosive mechanism of developing an electrical breakdown of dense intergranular gaps, which leads to deterioration of the dispersion of the eroded material, and the use of smaller energy ranges (<1 J) in such installations is complicated by the electrophysical limitations of the existence of plasma channels and the loss of energy efficiency of the electric spark treatment process. Goal. Research on the energy efficiency of the electric spark dispersion process of heterogeneous conductive granular media in a reaction chamber with a cylindrical electrode system, provided that it is powered by a transistor pulse generator. Results. Specific energy consumption in the process of electric spark dispersion of aluminum and titanium granules was determined, which correlate with the average power consumption indicators of processing depending on their bulk volume within a certain configuration of the electrode system. Scientific novelty. The flow of current through ohmic contacts until the formation of the main discharge in the intergranular volumes of the reaction chamber causes a voltage drop across the inductance of the discharge circuit, which accordingly reduces the amplitude of the applied voltage to the interelectrode gap, due to which the maximum of the average power consumption characteristic of the transistor pulse generator, which occurs before the beginning of the saturation section of the effective frequency curve of the discharge pulses, corresponds to the most consistent mode of energy input into the electric spark load. The practical value of the considered model of the electric discharge installation proves the feasibility of its use for the tasks of electric spark treatment of conductive granular media. References 21, tables 2, figures 7.
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