Open AccessComparison of two starting options for conveyor belt electric drive
Author(s) -
Vladimir Pavlov
Publication year - 2020
Publication title -
vestnik irkutskogo gosudarstvennogo tehničeskogo universiteta
Language(s) - English
Resource type - Journals
eISSN - 2500-1590
pISSN - 1814-3520
DOI - 10.21285/1814-3520-2020-5-1069-1079
Subject(s) - stator , induction motor , control theory (sociology) , power (physics) , moment (physics) , mechanical energy , acceleration , maximum power principle , mechanics , electromagnetic coil , matlab , energy (signal processing) , motor soft starter , tension (geology) , voltage , engineering , mechanical engineering , mathematics , electrical engineering , physics , computer science , classical mechanics , statistics , control (management) , quantum mechanics , artificial intelligence , operating system
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.