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Automatic control of magnetic separator productivity based on spectral signal converter of electric motor active power

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Category: Geotechnical and mining mechanical engineering, machine building

Last Updated on 16 July 2014

Published on 21 March 2014

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Authors:

M.A. Alekseyev, Dr. Sci. (Tech.), Professor, State Higher Educational Institution “National Mining University”, Dean of the Faculty of Information Technologies, Head of the Department of Software Engineering, Dnepropetrovsk, Ukraine.

Faris Samir Rasmi Alhоri, State Higher Educational Institution “National Mining University”, Postgraduate student of the Department of Economic Cybernetics and Information Technologies, Dnepropetrovsk, Ukraine.

Abstract:

Purpose. Scientific justification of the method of accuracy enhancement of automatic control of magnetic separator performance on magnetic product by the signal of active power consumption of the grid by drive motor of separator bowl.

Methodology.Determination of the theoretical dependences of frequency and amplitude of the signal oscillations of active power of the drive motor on the separator performance and on the parameters of the electromagnetic and electromechanical time constants of the electric drive system. Frequency range for the spectral analysis of the active power signal is determined on the basis of the dependences. Experimental studies of the two methods of automatic control of magnetic separator performance: by the average value and by the spectral component of the signal of active power were conducted in the industrial environment.

Findings. The result of the research is the development of the method of automatic control of magnetic separator performance on magnetic product by the spectral component of active power signal of drive motor of separator bowl. The introduced method has higher accuracy than the ones currently in use.

Informative ranges of signal frequency of active power of drive motor of separator are determined. This makes it possible to create a system of performance automatic control for different types of separators.

Originality. Establishment of new patterns of formation of the dynamic component of the active power signal of drive motor of separator bow as a function of the separator performance by magnetic product and the parameters of the electromagnetic and electromechanical time constants.

It is determined that at the frequency of traveling field in the working area of the separator the average oscillations amplitude of the dynamic component of the active power signal of the separator driving motor is directly proportional to the magnetic separator performance on magnetic product.

Practical value. Development of the method and system for automatic control of the magnetic separator performance on magnetic product with reduced error of measurement of less than 5%.

References:

1. Кочура Е. Теоретические зависимости активной мощности приводного электродвигателя барабана магнитного сепаратора от характеристик концентрата / Е.В. Кочура // Обогащение руд. – 1994. – № 6. – С. 46–48.

Kochura, Ye.V. (1994), “Theoretical active power according to the drive motor of the drum magnetic separator characteristics concentrate”, Obogashchenie rud, no. 6, pp. 46–48.

2. Петров И.И. Специальные режимы работы асинхронного электропривода. / И. Петров, А. Мейстель. – М.: Энергия, 1997. – 298 с.

Petrov, I.I. (1997), Spetsialnye rezhimy raboty asinkhronnogo elektroprivoda [Special Modes of Induction Motor], Energiya, Moscow, Russia.

3. Справочник: асинхронные двигатели серии 4А / [Кравчик А.Э., Шлаф М.М., Афонин В.И. и др.]. – М.: Энергоиздат, 2001. – 504 с.

Kravchik, A.E., Shlaf, M.M., Afonin, V.I. (2001),Spravochnik: asinkhronnye dvigateli serii 4A [Reference book: Induction Motors of 4A Series], Energoizdat, Moscow, Russia.

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