Vestnik of Samara State Technical University. Technical Sciences SeriesVestnik of Samara State Technical University. Technical Sciences Series1991-85422712-8938Samara State Technical University7913410.14498/tech.2021.2.8Original ArticleCorrection of the static characteristic of a frequency converter to reduce the amplitudes of resonance vibrations of the vibrating tableVedernikovAlexander S.<p>Ph.D. (Techn.), Associate Professor</p>vest_teh@samgtu.ruDunaevDmitry I.<p>Engeneer</p>vest_teh@samgtu.ruSamara State Technical UniversityFSUE «RFNC-VNIIEF»300820212921171282508202125082021Copyright © 2021, Samara State Technical University2021<p>It is known that vibration systems of directional vibrations based on asynchronous vibration motors are currently widely used in practice, but at the same time they have a significant drawback - a sharp increase in vibration amplitudes when passing through the resonance zone at the time of acceleration and deceleration of vibration motors, which negatively affects their operation. The article discusses a vibration table with two unbalanced asynchronous vibration motors. The calculation scheme and equations of motion of such a vibration system are presented. It is shown that the vibration table as a control object is an oscillatory link with a pronounced resonant frequency. The equations of motion of asynchronous vibration motors with scalar frequency control are given. A structural diagram of a vibration table with unbalanced exciters has been developed, the modeling of which made it possible to determine the amplitudes of resonant oscillations. It is proposed to apply correction of the static characteristics of the frequency converter, which connects the effective value of the output voltage with the frequency, to reduce the resonance amplitudes. Equations of the desired static characteristics of the inverter and analytical dependences for calculating the necessary coefficients for its implementation are given. A computational model has been developed that makes it possible to take into account the effect of the corrected static characteristic of the frequency converter on the operation of the vibrating table at the stages of acceleration and deceleration. The results of computer simulation are given, convincingly showing that the correction of the static characteristics of the inverter is an effective means of reducing the amplitudes of resonant oscillations. It is shown that modern frequency converters have functionality that makes it easy to correct the dependence of the effective value of the output voltage on the frequency. The need to adjust the static characteristics of the inverter for a specific type of product tested on the vibration table is noted.</p>vibration tableasynchronous vibration motorresonancevibration amplitudefrequency converterвибрационный столасинхронный вибродвигательрезонансамплитуда колебанийчастотный преобразователь[Bykhovsky I.I. Fundamentals of the theory of vibration technology. M.: Mechanical Engineering, 1968. 362 p.][Panovko G.Ya., Shokhin A.E., Eremeikin S.A. Control of the resonant mode of operation of a vibratory machine driven by an asynchronous electric motor // Problems of mechanical engineering and reliability of machines. 2015. Vol. 2. Pp. 3–8.][Eremeykin S.A., Krestnikovsky K.V., Panovko Ya.G., Shokhin A.E. Experimental analysis of the operability of the vibration control system of a mechanical system with self-synchronizing vibration exciters // Journal of Mechanical Engineering and Reliability. 2016. T. 45. Vol. 6. Pp. 553–558.][Cieplok G. Estimation of the resonance amplitude in machines with inertia vibrator in the coast-down phase. Mechanics & Industry. 2018. Vol. 19. No. 1. P. 9.][Lanets O.S., Dmytriv V.T., Borovets V.M., Derevenko I.A., Horodetskyy I.M. Analytical Model of the Two-Mass Above Resonance System of the Eccentric-Pendulum Type Vibration Table. International Jour-nal of Applied Mechanics and Engineering. 2020. Vol. 25. No. 4. Pp. 116–129.][Blekhman I.I. Theory of vibration processes and devices. Vibration mechanics and vibration technology. St. Petersburg: Ore and Metals, 2013. 640 p.][Gavrilov E.N. Dynamic processes of resonant vibration machines // Bulletin of Kazan Technological University. 2013. T. 16. Vol. 12. Pp. 87–90.][Dmitriev V.N., Gorbunov A.A., Gavrilov E.N. Investigation of starting modes of an asynchronous debalance vibration motor into the resonance zone // Izvestiya vysshikh uchebnykh zavod. Energy problems. 2012. Vol. 1–2. Pp. 128–132.][Dmitriev V.N., Gorbunov A.A., Gavrilov E.N., Khakhaleva N.A. Vibration electric drive based on unbalances with transient static moment // Questions of theory and design of electrical machines. Modeling of electromechanical processes: collection of scientific papers. Ulyanovsk: UlSTU, 2010. Pp. 130–135.][Dmitriev V.N., Lunina N.A., Dunaev D.I. Mathematical modeling of an asynchronous vibration electric drive // Proceedings of the VIII International (XIX All-Russian) conference on the automated electric drive AEP-2014. Saransk: Publishing house of Mordovs University. 2014. T. 1. Pp. 312–315.][Petrov L.P. Management of starting and braking of asynchronous motors. Moscow: Energoizdat, 1981. 184 p.][Gavrilov E.N. Investigation of braking modes of resonant vibration transporting machines // Bulletin of Kazan Technological University. 2013. T. 16. Vol. 12. Pp. 84–87.][Kislitsin A.L., Dunaev D.I., Zhirnov S.N. Investigation of capacitor opposition in the braking mode of an asynchronous vibration motor // Electrotechnical systems and complexes. 2018. Vol. 4 (41). Pp. 11–16.][Dmitriev V.N., Dunaev D.I., Zhirnov S.N., Lunina N.A., Babin A.N. Braking modes of an induction motor // Collection of materials of the 48th scientific and technical conference "University science in modern conditions". Ulyanovsk, 2014. Pp. 9–12.][Kashkalov V.I. Condesantor braking of asynchronous motors. Moscow: Energy, 1977. 120 p.][Dubovik D.V. Substantiation of rational dynamic parameters of vibration installations with an asynchronous electric drive for operation in the resonance zone: Dis. ... cand. tech. sciences / D.V. Dubovik. St. Petersburg: SPbGETU "LETI", 2014. 176 p.][Electric drive control systems: Textbook for students. higher. study. institutions / V.M. Terekhov, O.I. Osipov; ed. V.M. Terekhova. Moscow: Academy, 2005. 304 p.][Mikhailov O.P. Automated electric drive of machine tools and industrial robots. Moscow: Machine building, 1990. 302 p.][Kuznetsov V.A., Migachev A.V., Starikov A.V., Titov A.R. Features of the mathematical model of an asynchronous electric motor for oil air coolers // Bulletin of the Samara State Technical University. Engineering sciences. 2011. Vol. 3 (31). Pp. 171–179.][State Standard 32144-2013. Vibration. Shaker selection guide. Part 1. Equipment for vibration testing. M.: Standartinform, 2019. 35 p.][Alexander Starikov, Dmitry Dunaev. Research of the Effect of the Inverter Resonance Frequency Skip Function on the Operation of a Vibration Stand in Acceleration and Braking Modes // 2020 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon) IEEE Xplore, 2020. Pp. 1–5. DOI: 10.1109/FarEastCon50210. 2020.9271223.]