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Features of modeling of electromagnetic field of electric machines when magnetic system properties change

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Category: Electrical complexes and system

Last Updated on 19 January 2017

Published on 19 January 2017

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Authors:

M.Zagirnyak, Dr. Sc. (Tech.), Prof., Kremenchuk Mykhailo Ostrohradskyi National University, Kremenchuk, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V.Prus, Cand. Sc. (Tech.), Assoc. Prof., Kremenchuk Mykhailo Ostrohradskyi National University, Kremenchuk, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

I.Kushch, Kremenchuk Mykhailo Ostrohradskyi National University, Kremenchuk, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

D.Miljavec, Dr. Sc. (Tech.), Prof. University of Ljubljana, Ljubljana, Slovenia

Abstract:

Purpose. Determination of particular features of electric machines electromagnetic field modeling when the change of magnetic system properties is caused by the presence of damages of the main types occurring during electric machines long-term operation and repairs.

Methodology. The comparative experimental analysis of changes of the properties of electric machine magnetic systems during their repair and long-term operation is substantiated. Mathematical grounds for influence of magnetic system main faults on electromagnetic field described by Maxwell’s equations. Numerical modeling of magnetic field in electric machines with damaged magnetic systems with the finite-element method.

Findings. The principles of modeling electromagnetic field in electric machines with magnetic system damages characterized by considerable error-free running time and subjected to a number of overhauls have been grounded. As a result, the necessity of the use of models of various types for calculation of electromagnetic field, depending on the presence and localization of the main types of magnetic system damages, has been proved. The adequacy of the proposed approach to modeling core defects of DC motors has been confirmed.

Originality. The peculiarities of different types of damages in laminated cores and the ways to take them into account while simulating electric machine electromagnetic field are studied. The ways of solving the mentioned task using the finite element method by the example of computation of the change of vibroexcitation forces caused by the electromagnetic nature in direct current machines are developed.

Practical value. The obtained results make it possible to predict the change of an electromagnetic component of vibration and irregularity of torque distribution of DC motor, caused by laminated core defects. There is also a possibility of estimating the rate of laminated core damage influence on the main IM operating characteristics.

References/Список літератури

1. Zagirnyak, M., Prus, V., Kolotilo, I. and Miljavec, D., 2012. Determination of power indices for a three-phase induction motor with a phase-wound rotor through particular losses components. Przeglad Elektrotechniczny (Electrical Review), No. 12b, pp. 80–82.

2. Hadziselimovec, M., Marcic, T., Stumberger, B. and Zagradicnik, I., 2011. Winding type influence on efficiency of an induction motor. Przeglad Elektrotechniczny (Electrical Review), Vol. 87, Iss. 3, pp. 61–64.

3. Vaskovskii, Yu.M., 2007. Poliovyi analiz elektrychnykh mashyn [Electric machines field analysis]. Kyiv: NTU “KPI”.

Васьковський Ю.М. Польовий аналіз електричних машин / Васьковський Ю.М. – К.: НТУ „КПІ“, 2007. – 190 с.

4. Prus, V.V., Zagirnyak, M.V. and Nikitina, A.V., 2006. Grounds for Efficiency and Prospect of the Use of Instantaneous Power Components in Electric Systems Diagnostics. Przeglad Elektrotechniczny (Electrical Review), No. 12, pp. 123–125.

5. COMSOL, 2008. Multiphysics Reference Guide, Version 3.5a. COMSOL AB.

6. Ansoft Corporation, 2011. Ansoft Maxwell 3D User’s Guide, Rev 3.0. Pittsburgh: Ansoft Corporation

7. Shmelev, V.E., 2010. Prostranstvenno-fazovoie mo delirovaniie elektromekhanicheskoho preobrazovaniia energii v apparatahk i mashynakh vrashcha telnogo dvixheniia [Space-phase modeling of energy electromechanical transformation in rotational motion units and machines] Vladimir: Publishing house of Vladimir State University.

Шмелев В.Е. Пространственно-фазовое моделирование электромеханического преобразования энергии в аппаратах и машинах вращательного движения / Шмелев В.Е. // Владим. гос. ун-т. – Владимир: Изд-во Владим. гос. ун-та, 2010. – 172 с.

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