Branch of the National Research University “Moscow Power Engineering Institute”, Smolensk, Russia:

V. V. Rozhkov, Candidate of Engineering Sciences, Assistant Professor, Head of the Department of Electromechanical Systems, e-mail: umo@sbmpei.ru
K. K. Krutikov, Candidate of Engineering Sciences, Assistant Professor, Department of Fundamentals of Electrical Engineering, e-mail: krutikov-kk@yandex.ru
A. S. Fedulov, Doctor of Engineering Sciences, Professor, Head of the Department of Computer Engineering, e-mail: fedulov_a@mail.ru
V. V. Fedotov, Student, Department of Electromechanical Systems, e-mail: fedotovvladimirv@yandex.ru

The paper analyzes two promising variants of an energy-saving electric drives for lifting mechanisms of non-ferrous metallurgy enterprises. As the first variant, a variable-frequency asynchronous electric drive with active rectifier according to a modified main circuit is proposed. The second one is an asynchronous electric drive with pulse control in a rotary circuit and a network-driven inverter. There is shown an expediency of applying the suggested options for electric drives of lifting mechanisms, the load of which is an active moment, and the lowering and lifting modes in a work cycle are equal in time. Computer simulation models for the considered variants have been developed in MatLab software package; transients in electric drives for typical cycle execution of lifting mechanisms have been analyzed and compared for each variant. A qualitative and quantitative comparison of dynamic processes in electric drives, their power modes and the resulting energy efficiency has been carried out.

The work was carried out according to the State task, project No. FSWF-2020-0019.

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