MODELLING OF INDUCTION MOTOR IN MULTIPHASE COORDINATE SYSTEM FOR ASYMMETRY ROTOR CAGE

Autor: Alexander S. Glazyrin, Vladimir I. Polishchuk, Vadim V. Timoshkin, Dmitry M. Bannov, Yusup N. Isaev, Dmitriy I. Antyaskin, Sergey N. Kladiev, Alexander A. Filipas, Sergey V. Langraf, Denis A. Kotin, Vladimir Z. Kovalev
Jazyk: ruština
Rok vydání: 2021
Předmět:
Zdroj: Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 332, Iss 10, Pp 213-227 (2021)
Druh dokumentu: article
ISSN: 24131830
2500-1019
2413-1830
DOI: 10.18799/24131830/2021/10/3404
Popis: Relevance of the study is caused by an urgent need in theoretical justification and practical development of selective methods of diagnosing complex internal damages of powerful high-voltage squirrel-cage induction motors, which are one of the main elements of responsible mechanisms of all technological processes in fuel and energy complex. As a rule, specificity of work of high-voltage squirrel-cage motors in fuel and energy complex, both at a stage of extraction and transportation of georesources, and at a stage of their processing, are heavy conditions of start-up, especially it is expressed for critical mechanisms of thermal power plants (feed pumps, mills, crushers, smoke exhausters, blowers, etc.). Failures of squirrel-cage induction motors of critical mechanisms at thermal power plants lead to either shutdown of a power unit or at least to reduction of a level of electric power generation. At the same time, despite the gravest and, as a rule, irreversible consequences, there are no protections against such damage as defects in short-circuited winding of squirrel-cage induction motor rotor and such damage is detected only during overhaul. Broken-rotor-bar in the initial stage is latent and is a trigger for the development of more dangerous emergency modes. Lack of tested technical means for diagnostics of this type of damage is first of all related to insufficient formalization of mathematical description of processes in squirrel-cage induction motor when defects in rotor winding occur. Object: high voltage squirrel-cage induction AC motors. The aim of the research is to perform modeling of induction machine with electrical asymmetry rotor, adequately reflecting physical processes in the machine when damage occurs in the rotor cage. Methods. Theoretical research methods were used to solve the problem. They include: the theory of electrical machines, numerical methods. Simulation modeling was performed in MatLab environment, and mathematical data processing in MathCad package. Results. An n-phase simulation model of an induction motor has been developed, which allows us to investigate the broken rotor bar in a squirrel-cage. Proposed analytical expressions, which describe the motor operation when the rotor is stationary.
Databáze: Directory of Open Access Journals
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