Vestnik of Samara State Technical University. Technical Sciences SeriesVestnik of Samara State Technical University. Technical Sciences Series1991-85422712-8938Samara State Technical University7913410.14498/tech.2021.2.8Research 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. 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