Purpose. The article presents a laboratory setup and a measuring system of oscillations of a fixed wire with a transverse impact.Findings. This measuring system can be used to determine wire displacements from 1.5 µm with a time resolution of 5 ns.Practical meaning. The laboratory setup will allow experimental studies of the reaction of the wire and the frozen ice tube to a mechanical shock by an inductor, the speed and energy of which can be an order of magnitude higher than that of a pendulum. Originality/value. Described installation for the study of the destructive effect transmitted to the ice indirectly, through a bump,mounted on the wire.

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The article describes the analytical model of the magnetic-pulsed electromechanical energy converter in relation to the device for preventing ice formation on power lines. The inductor system of the device is a flat inductor and a firing pin made of electrically conductive material. The mobility of both the firing pin, and also the inductor is due to the attachment of the device to the pair of power line wires. This feature, in contrast to the fixed position of the inductor traditionally used, required the development of the universal design scheme for the electrodynamic interaction of the inductor and the firing pin. The proposed analytical model takes into account the forces of resistance to the motion of the inductor system caused by the presence of the elastic return mechanisms in the device and attachment to the power line wire, which is a body with a distributed mass. The developed analytical model was tested. The calculation of the device parameters for the transmission line span with the specified mass-dimensional characteristics was performed.

The article is devoted to an experimental study of the dynamic characteristics of the four-beam frequency filter under consideration in various power consumption modes. Based on the PSpice program, a typical power supply circuit for LED lamps was modeled. The peaks of the harmonic series reflect the power of the higher harmonics relative to the fundamental harmonic. In the three-phase mode of the lighting systems switching, the filter compensating device according to the four-beam “star connection” scheme is more efficient. The experimental results showed that the content of the 3rd harmonic, when the filter of the compensating device is turned on, exceeds the permissible state standard specification by 5% only in the 6-fold asymmetry mode in the current of the main power supply. Thus, in three-phase networks, using a four-beam passive harmonic filter, it is possible to suppress the higher harmonics of non-sinusoidal voltages and currents effectively. The filtering level of the harmonic components provides a significant reduction in the non-sinusoidality of the current and, as a result, an increase in the quality of electricity, as well as a reduction in power losses in the filter compensating device, a decrease in the overall dimensions of the filter and its cost.

The high cost of precious metals and environmental requirements lead to the need for the completeness of their extraction from primary and secondary raw materials. During the processing of primary raw materials, waste solutions are produced that contain low-concentration precious metals, which must be removed from the process. To prevent losses and comply with environmental protection requirements, it is necessary to extract precious metals from waste solutions. The complexity of this task lies in the low concentration and chemical forms of the presence of precious metals in aqueous systems. The cementation method, currently used for the extraction of precious metals, has several disadvantages: the duration of the process, high-energy consumption, etc. To increase the efficiency of the method used, it is necessary to pre-treat the solution with the goal of labilizing the noble metal complexes. The purpose of the experiment: determination of the optimal modes of the electrohydropulse (EHP) method for intensifying the process of additional extraction of platinum group metals (PGM) and heavy non-ferrous metals from industrial solutions of refining production. As a result of the study, the necessary materials were selected to create the reactor and electrode systems, the volume of the laboratory reactor was determined. Trial launches of the installation were carried out, according to the results of which a pulse current generator (PCG) was configured. A series of tests was carried out, based on the results of which conclusions were drawn about the possibility of using this method to activate stock solutions.