Dynamics of Digital System of Two-Motor Electrical Drive with Elastic Transmissions

Jumber Dochviri^1, , Oleg Khachapuridze¹ and Nana Beradze¹

¹Department of Electrical Engineering, Faculty of Power Engineering and Telecommunications, Georgian Technical University, 77, M. Kostava str., 0175 Tbilisi, Georgia

Cite this paper

Jumber Dochviri, Oleg Khachapuridze and Nana Beradze. Dynamics of Digital System of Two-Motor Electrical Drive with Elastic Transmissions. American Journal of Electrical and Electronic Engineering. 2016; 4(1):16-22. doi: 10.12691/AJEEE-4-1-3

Abstract

The appearance in recent years of the two-motor electric drives on the presses of high speed paper machines ensures increasing of the life of expensive press felts and improvement of production quality. The easiest and accurately acting from the different existing control systems of drives are two-motor drives with a total speed controller and individual thyristor converters for each motor separately. In this paper we study the dynamic characteristics of the system with a digital controller and correctors. The mathematical model of two-motor thyristor electric drive, taking into account the elastic properties of mechanical transmissions, is given. Applying the logarithmic frequency characteristics for tuning of digital controllers, correctors and current sensors of the drive system are given. The results of investigations of transient processes using the MATLAB sources are presented. This system guarantees maximum performance and proportional distribution of load between the motors without any additional controllers.

Keywords

digital control, two-motor electrical drive, dynamics, automatic distribution of loading

Copyright

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

References

[1]	V. D. Baryshnikov, Y. A. Bortsov, et al.-Dynamics of Thyristor Electrical Drives of the Sections of Paper Machines // J. Russian Electrical Technology, 1973, v. 1, pp. 43-48.
[2]	J. N. Dochviri-The Optimization of Transients in Multi-Motor Thyristor Electric Drives with Elastic Links for the Press Mechanisms of Continuous Technological Machines // J. Russian Electrical Technology. 2006, v. 2, pp. 34-42.
[3]	K. Ogata-Discrete-Time Control Systems. Upper Saddle River, N.J.: Prentice hall, 1994.
[4]	C. Kessler-Das Symmetrische Optimum // J. Regelungstechnik, 1958, v.6, pp. 395-400.
[5]	E. Raatz-Regelung von Antrieben mit Elastischer Verbindung zur Arbeitsmaschinen // ENZ, 1981, A92, №4б pp. 211-216.
[6]	J.N. Dochviri, O.G. Kervalishvili-The Dynamics of Two-Motor Electrical Drives with one Speed Regulator and Individual Thyristor Converters // Bull. Georgian Acad. Sci., 1978, v.91(2), pp. 421-424.
[7]	A. Antoniou-Digital Filters: Analysis, Design and Applications// McGraw-Hill, New York, 1993.
[8]	J. Dochviri, O. Khachapuridze, N. Beradze-A Digital Filter for Electrical Drive with Elastic Shaft // American Journal of Electrical and Electronic Engineering, 2015, v.3, №5, pp. 112-116.