A Dual-speed Induction Motor as a Source of Electrical Hazard in Operating Conditions of Coal Mine Process Support Areas
- E.V. Denisova1, K.N. Marenich2, E.S. Dubinka2
1 Saint Petersburg State University of Architecture and Civil Engineering, St. Petersburg, Russian Federation
2 Donetsk National Technical University, Donetsk, Donetsk People's Republic
Russian Mining Industry №4 / 2021 р. 145-152
Abstract: Hazardous states of the mine zonal electrical network are caused by the reversed energy flows of induction motors of the energy-consuming equipment in the run-down mode after the power supply is switched off. The electromotive force (EMF) induced in the powered-off stator windings of the dual-speed motors due to the transformer effect also pose a danger of electric shock. The paper presents a methodology and the results of studying the formation of induced EMFs in the powered-off stator windings of dual-speed induction motors, including the run-down mode and the functions that impact on the electromagnetic parameters. Analysis of the impact degree of these induced EMFs on the electrical safety parameters as part of the mine zonal electrical network is presented.
Keywords: electrotechnical complex, dual-speed induction motor, run-down mode, back electromotive force, safety deenergizing, parameter control, modeling, functional dependencies
For citation: Denisova E.V., Marenich K.N., Dubinka E.S. A Dual-speed Induction Motor as a Source of Electrical Hazard in Operating Conditions of Coal Mine Process Support Areas. Gornaya promyshlennost = Russian Mining Industry. 2021;(4):145–152. (In Russ.) DOI 10.30686/1609-9192-2021-4-145-152.
Article info
Received: 05.07.2021
Revised: 23.07.2021
Accepted: 26.07.2021
Information about the authors
Elena V. Denisova – Candidate of Technical Sciences (PhD in Engineering), Associate Professor, Department of Descriptive Geometry and Engineering Graphics, Saint Petersburg State University of Architecture and Civil Engineering, St. Petersburg, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Konstantin N. Marenich – Doctor of Science (Engineering), Professor, Head of the Department of Mining Electrical Engineering and Automation named after R.M. Leybov, Donetsk National Technical University, Donetsk, Donetsk People's Republic; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Ekaterina S. Dubinka – Donetsk National Technical University, Donetsk, Donetsk People's Republic; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
References
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