Khilov, V. S. (2022) RESOURCE-SAVING CONTROL SYSTEMS FOR ELECTRIC DRIVES OF MODERNIZED DRILL RIGS FOR OPEN-MINES OF UKRAINE. UNIVERSITAS Publishing. с. 368-396.

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English abstract

A comparative analysis of the characteristics of DRGs used in opencast mining in Ukraine is given. Experimental studies of the influence of drive systems and drill rigs on the dynamics of the drill process were carried out in the mining and geological conditions of the Central Mining and Processing Plant (Kryvyi Rih, Ukraine). Frequency characteristics and analysis of dynamic properties of automated drive systems and frequency characteristics of transmissions of the rotation mechanism are obtained. The behavior of natural frequency oscillations in closed control circuits of rotary actuators was studied and it was found that they cross the cutoff frequency and fall into the bandwidth from the attenuation band in frequency-controlled asynchronous motors of new generation drill rigs when using the maximum number of connected tubes in the drill rod. It is established that the lowest oscillation frequencies due to the lateral frequencies generated by the oscillations of the drill rod fall into the fastest internal current loop. The purpose and objectives of research is energy and resource saving in the process of drill subsoil wells by concentrating the flow of mechanical power in the bottom hole zone and ensuring minimum dynamic loads in the drill machine in the presence of elastic connections and variable natural frequencies in multi mass transmission with concentrated and distributed parameters. The object of the study is the frequency compatibility of electromechanical processes in the electric drive rotation of the drill rig with distributed parameters taking into account the change of attached distributed and concentrated masses to the transmission. The subject of research is the elastic properties of transmissions, frequency characteristics of control systems and their mutual influence on the quality of work in electric drives.

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