METHOD FOR COMPENSATING THE INFLUENCE OF HARMONIC OSCILLATIONS OF THE LOAD MOMENT IN AN ELECTROMECHANICAL SYSTEM AND A DEVICE FOR ITS IMPLEMENTATION

摘要

FIELD: electrical engineering.SUBSTANCE: invention relates to electrical engineering and can be used to control parameters of complex electromechanical systems, for example, DC and AC electric drives. Method for compensating the influence of harmonic oscillations of the load moment in an electromechanical system involves analyzing a spectrogram of speeds of the electromechanical system, selecting the most sufficient disturbance frequency, calculating a polynom forming a mathematical model of disturbance, entering this polynom as a multiplicand into the denominator of the controller transfer function, synthesizing coefficients of the controller and feedback of the internal circuit. Herewith the mathematical model of disturbance is divided into an integral and an oscillating components. Proposed device has series-connected: an external generator, the first comparator, a controller, the second comparator, an integrator, the third comparator, a power converter connected to a DC motor, a measuring unit configured able to measure voltage of the power converter, current and speed of the DC motor. Outputs of the measuring unit are connected via feedback by voltage, current and speed through the respective instantaneous links via feedback by voltage with transmission ratio K1, by current with transmission ratio K2, by speed with transmission ratio K3, with appropriate inverting inputs of the third comparator, herewith the output of the measuring unit by speed is additionally connected to inverting inputs of the first and the second comparators.EFFECT: improved dynamic accuracy and reduced hardware or software costs at technical implementation of the system.2 cl, 4 dwg