The influence of the electric asymmetry level on the qualitative indicators of an asynchronous motor for the needs of the mining industry

The article is devoted to assessing the influence of the level of rotor phase asymmetry on the quality of the operation of an asynchronous motor, which is an element of the electric drive of mechanisms in the mining industry. The main results of the work were obtained on the basis of fundamental theorems and equations of electrodynamics, numerical calculation of differential equations of the first order with variable coefficients using the method of successive approximations. The analysis of the main types of asymmetric modes of asynchronous motors and the reasons for their occurrence in severe operating conditions of a mining enterprise is carried out. Groups of asymmetric modes, most often occurring in high-voltage asynchronous motors in the mining industry, are singled out. The problems and characteristic features of modeling asymmetric modes of an asynchronous motor are reflected, taking into account the saturation of the steel of the magnetic circuit. A mathematical model of an induction motor modified with respect to the classical notation in a three-phase natural coordinate system for calculating currents and electromagnetic torque under conditions of asymmetry of the active resistances of the phases of the rotor winding is presented, the results of numerical simulation of such a mode are shown. The analysis of the distinctive features of the selected mode in comparison with the symmetrical mode of operation and the impact on the behavior of mining machines during operation was carried out.

Keywords: Induction motor, electrical asymmetry, phase failure, mathematical model, numerical simulation, steel saturation, Gerges effect, electromagnetic torque, three-phase coordinate system.
For citation:

Lavrenov Е. О., Temlyakova Z. S., Vilberger M. Е., Grechkin V. V., Temlyakov А. A. The influence of the electric asymmetry level on the qualitative indicators of an asynchronous motor for the needs of the mining industry. MIAB. Mining Inf. Anal. Bull. 2022;(12-2):174—189. [In Russ]. DOI: 10.25018/0236_1493_2022_122_0_174.

Acknowledgements:
Issue number: 12
Year: 2022
Page number: 174-189
ISBN: 0236-1493
UDK: 621.313.33
DOI: 10.25018/0236_1493_2022_122_0_174
Article receipt date: 24.01.2022
Date of review receipt: 27.09.2022
Date of the editorial board′s decision on the article′s publishing: 10.11.2022

Lavrenov E. O.1, Cand. Sci. (Eng.), engineer of electromechanic branch, e-mail: e.lavrenov@inbox.ru, ORCID ID: 0000-0002-1669-5148;
Temlyakova Z. S.1, Dr. Sci. (Eng.), professor, e-mail: Temlyakova@corp.nstu.ru, ORCID ID: 0000-0002-3692-5035;
Vilberger M. E.1, Cand. Sci. (Eng.), assistant professor, dean of mechatronic and automation faculty, e-mail: Vilberger@corp.nstu.ru, ORCID ID: 0000-0001-8762-9917;
Grechkin V. V.1, Cand. Sci. (Eng.), assistant professor, e-mail: Grechkin@corp.nstu.ru, ORCID ID: 0000-0002-2272-2050;
Temlyakov A. A.1, student of mechatronic and automation faculty, e-mail: maksidor@inbox.ru, ORCID ID: 0000-0002-2026-3129;
1 Novosibirsk state technical university, Novosibirsk, K.Marks av.,20, Russia.

For contacts:

LavrenovE. O., e-mail: e.lavrenov@inbox.ru.

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