Сравнение двух вариантов пуска электропривода ленточного конвейера
https://doi.org/10.21285/1814-3520-2020-5-1069-1079
Abstract
The purpose of the paper is to study the energy and operational parameters of a belt conveyor under two starting methods: direct and frequency. Taking into account the non-linearity of the mathematical description of belt conveyor mechanical part and induction motor drive, the analysis of starting modes is carried out by the method of nonlinear differential calculus where equivalent masses are replaced with the discrete ones. The calculations are performed on the models using MATLAB. It is found out that the use of a frequency converter for the conveyor allows to reduce the maximum current by 4.7 times when starting the motor; by 2.5 times the maximum moment; by 1.52 times the maximum moment of resistance forces on the motor shaft; by 8.68 times the maximum value of power losses in stator windings; by 10.2 times the total power losses; by 2.9 times the power consumed from the network; by 3.4 times the amount of energy losses in the stator windings; by 3 times the total energy losses; by 1.25 times the energy consumed from the network; by 3 times the maximum acceleration of the belt; by 3 times the overshooting values during transients by the values of leading tension forces of the belt on various sections of the conveyor; by 1.875 times the transients duration in terms of the leading tension forces of the belt on different sections of the conveyor. The developed mathematical model of the belt conveyor makes it possible to obtain quantitative estimates of energy and operational parameters of the installation under two starting methods: direct and frequency. The use of frequency start-up of the conveyor allows to decrease motor energy losses by 3 times. It also reduces motor heating as well as decreases the maximum values of belt tension forces on various sections of the conveyor by more than three times.
About the Author
V. E. Pavlov
Irkutsk National Research Technical University
Russian Federation
Russian Federation
Vladimir E. Pavlov, Cand. Sci. (Eng.), Associate Professor, Associate Professor of the Department of Electric Drive and Electric Transport
83, Lermontov St., Irkutsk 664074
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Review
For citations:
Pavlov V.E. Сравнение двух вариантов пуска электропривода ленточного конвейера. Proceedings of Irkutsk State Technical University. 2020;24(5):1069-1079. (In Russ.) https://doi.org/10.21285/1814-3520-2020-5-1069-1079
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