Energy saving regulators for systems of the automated electric drive
Abstract
Energy saving regulators for systems of the automated electric drive
Incoming article date: 14.10.2016In article the decision of the task of finding of energy saving algorithms of closed control for electric drives is presented. The proposed approach is based on use of mathematical conditions of minimization of energy losses (power invariants) in electric motors as criteria of control. Energetic invariants for the main types of electric motors of a direct and alternating current are provided. For synthesis of energy saving regulators the principles and methods of the synergetic control theory are used. As an example the decision of the task of synthesis of algorithms of energy saving control for the asynchronous electric drive is considered. In case of synthesis of regulators the non-linear mathematical model of the asynchronous motor was used. The algorithm of energy saving control of the asynchronous electric drive providing stabilizing of angular speed of a rotor in the preset value and minimization of losses of energy is presented. Computer modeling of the closed system which completely confirms theoretical prerequisites and allows to draw the following conclusions is carried out. Firstly, the synthesized regulator provides asymptotic stability of the closed system of the relative set steady state. Secondly, at a variation of the external moment of efficiency of the electric motor remains constant and maximum. The comparative chart efficiency of the asynchronous motor in case of the energy saving control and traditional control realized in systems the “Transvector” type is provided.
Keywords: electric drive, automatic control, problem of synthesis of the regulator, energy saving