Frequency controlled drive of vibrating screens with unbalanced exciters: practical implementation and experimental results

DOI: https://doi.org/10.5937/zeint33-48149
Keywords: vibration, unbalanced exciters, vibratory sieves, power converter, frequency control, thermal power plant

Abstract


The paper presents a practically realized technical solution for frequency control of the AC power drive of vibrating sieves based on unbalanced vibration exciters. The operation of vibrating screen used in the industry for sieving and separating material fractions of different granulations is determined to a significant extent by the tilting angle of the vibrating sieve, its amplitude, the angle of attack of the excitation force and the frequency of oscillation. The frequency control of the vibrating sieves drive in this particular case made it possible to obtain the amplitude-frequency (AF) characteristic of the vibrating screen and based on it, the optimal operating frequency, which ensures the best separation of individual material fractions was determined. The solution was applied to two process lines in silos for de-ashing in the system of transport and separation of boiler slag from ash at the Thermal Power Plant "Nikola Tesla" B (TPP-B) in Obrenovac. The paper presents the key experimental results that were obtained during exploitation and testing of two implemented systems of regulated vibrating sieves.

Author Biography

Željko V Despotović, Univerzitet u Beogradu, Institut Mihajlo Pupin

Zeljko V.Despotovic was born in Prijepolje, Serbia. He finished primary school and high school in Nova Varos, 1979 and 1983, respectively. He received the B.Sc., M.Sc. and Ph.D. degrees in School of Electrical Engineering (Department of Power Converters and Drives), from the University of Belgrade, Serbia and Montenegro, 1990, 2003 and 2007, respectively. He has been with the Department of Mechatronics, Mihajlo Pupin Institute, Belgrade, since 1991. His research interests include the fields of power electronics, mechatronics, control of power converters, vibration control and control of vibratory conveying systems.

PROFESSIONAL EXPERIENCE:

September 1990 to present: Industrial Electronics and Power Electronics Engineer and Research Scientist in the Mechatronics Department, Mihajlo Pupin Institute, Belgrade, currently at the positions of Ph.D., E.E-scientific fellow and Research and Development Engineer of Power Electronics. He is an associate fellow of Laboratory for Digital Control of Power Converter and Drives-School of Electrical Engineering, University of Belgrade, Serbia. He is professor at the High School of Professional Studies in Electrical Engineering and Computer Science - Belgrade, Serbia, since February 2010. He is the associate research  professor on  PhD academic studies at School of Electrical Engineering, University of Belgrade , Chair of Power Converters and Drives (teaching on the courses: Power Converters, Control of Power Converters), since March  2015. He is IEEE Senior Member since to 2015.

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Published
2023/12/28
Issue
Vol. 33 No. 33 (2023): Zbornik radova, Elektrotehnički institut "Nikola Tesla"
Section
Professional Paper

Copyright (c) 2023 Proceedings, Electrical engineering institute "Nikola Tesla"

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