Study of adaptive control system of asynchronous electric drive belt conveyor

Abstract

THE POSSIBILITY of using various speed observers in a vector-controlled asynchronous electric drive system proposed for use on an inclined conveyor belt transporting iron ore concentrate is considered. THE PURPOSE is a comparative study of the dynamic characteristics of the vector control system of an asynchronous electric drive when using a speed sensor and speed observers of various types. THE RESEARCH METHODS are development of mathematical models of observers, computer modeling and analysis of dynamic modes of operation of the asynchronous electric drive vector control system when using a speed sensor and various speed observers in the conditions of operation of an inclined conveyor belt, analysis of the accuracy of speed measurement by the observers considered, taking into account the influence of thermal changes in the active resistance of the asynchronous motor windings. With the help of computer modeling, graphs of transient processes in the asynchronous electric drive system with vector control are obtained, the results of modeling dynamic characteristics and quality indicators in systems with a speed sensor mounted on the motor shaft and with speed observers. The degree of influence of the thermal change in the active resistance of the windings of an asynchronous motor on the work of observers of different types is determined. AS A RESULT of the studies carried out, it was found that the full-order speed observer provides a minimum error in speed measurement and can be used in an asynchronous electric drive system with vector control when it is used on an inclined conveyor belt.