Sidorenko V. Improvement of Monitoring Parameters of the Electric Drive Systems When Correcting the Electric Signals of Power Circles

The thesis deals with methods of increasing the efficiency of monitoring of the AC and DC electric drive systems when providing more accurate determination of electric drive parameters on the stage of measureable signals processing due to their correction. Investigated signals of power circles of the AC and DC electric drive systems with tiristor and transistor converters, in particular, TC-DCM, TVR-IM, PWC-DCM, TFC-IM with various modulation frequency. It has been grounded the necessity and possibility to improve the monitoring parameters of the electric drive systems taking into account the form of informing voltage and current signals in the process of diagnostics. The method of correction of electric signals parameters of electric drive power circles has been developed to increase the accuracy of electric drive parameters determination due to their parallel analysis on the period of processes recurrence. The analytical dependences have been obtained for the interval estimation of current, voltage and instantaneous power harmonic amplitudes in the power circles of electric drive with reliability less than a unit. The last determine the nominal parameters of electric drive. The increase of accuracy and authenticity of the electric drive systems parameters determination in the monitoring is possible when applying the offered methods due to decreasing the systematic basic errors influence on every stage of diagnostics.