Аннотация
The article examines a “variable-frequency drive–induction motor” system of a pneumatic conveying device from the perspective of improving energy efficiency and enhancing the dynamic characteristics of the electric drive. A structural diagram of the frequency-controlled induction electric drive is presented, transfer functions of the system elements are derived, and its stability is analyzed. The study of the electric drive dynamics is carried out based on mathematical modeling in the MATLAB environment using both symbolic and numerical methods. It is established that the voltage stabilization system of the frequency converter ensures a stable operating mode of the induction motor for various values of the controller parameters. The work also includes the synthesis of control system parameters aimed at minimizing energy consumption. An objective function of energy costs is obtained, and optimal parameters of the frequency converter voltage controller are determined. Numerical modeling demonstrated a reduction in power consumption from 4 kW to 2.89 kW, confirming the effectiveness of the proposed approach. The results of the study indicate that the use of a frequency-controlled electric drive in pneumatic conveying systems makes it possible to increase energy efficiency, improve transient processes, and ensure stable system operation under varying loads.