Control of electromechanical systems of conveyor lines

The subject of research is a method of controlling the speed of an asynchronous motor, connected according to the scheme of an asynchronous-valve stage, which increases the power factor of the drive and positively affects the power system as a whole. The purpose of the work is to develop and study methods of controlling electromechanical systems based on an asynchronous electric drive, which provide highly efficient operation of conveyor lines implemented on their basis as elements of complex technological equipment of an automated process control system. The article solves the following problems: analysis of conveyor line control tasks within the integrated automated process control system of production systems; analysis of actuating elements of conveyor lines electric drive; development of a method for regulating the speed of an asynchronous motor connected according to the circuit of an asynchronous-valve stage. The methodology of the work is based on the methods of the theory of electrical machines, the theory of the electric drive, numerous and analytical methods for solving differential equations, the theory of modeling. The results of the work include a method of controlling the speed of an asynchronous motor, based on the implementation of pulse control, characterized by the ability to maintain control angles of fully controlled power semiconductor elements to achieve a high power factor and change the frequency of turning on the power element of the electronic key that short-circuits the inverter. Influence of duration of relative duration of key commutation on performance element characteristics is investigated. Conclusions. Thus, the use of the proposed method of pulse control of the electric drive allows to expand the upper limit of speed control, increase the efficiency and power factor of the electric drive, reduce the inductance of the smoothing choke