The energy method for monitoring the instantaneous state and the formation of a synchronous motor control variables

Abstract

The present article is concerned with the analysis of three-phase currents and voltages information potential in synchronous and asynchronous motors input. The research is based on the theory of generalized energy flow of three-phase electromechanical converters. The measuring method for instantaneous values of three-phase motor circuit parameters is examined using the technology of data processing in generalized variables of energy state. The paper shows that the generalized currents and voltages allow identifying the actual instantaneous values such as phase current and voltage amplitudes, integrated active and reactive powers, and power factor including value and sign of phase angle. The research contains an estimate of accuracy and speed for measurement data of processing algorithms. The paper studies the matters of application of the method for analyzing electromagnetic processes in electrical machines. The analog-digital method of synchronous motor control using energy model of electric machine is presented. The paper introduces the algorithms for computing the instantaneous balance of active and reactive power of electromechanical converter as well as the subsequent algorithms for adaptive control of synchronous frequency and amplitude of three-phase voltage. The paper shows that the information support at analyzing the instantaneous energy state of three-phase electromagnetic system of synchronous motor essentially expands opportunities of formation of the motor control additional variables.