MODELLING OF DYNAMIC MODES OF AN INDUCTION ELECTRIC DRIVE AT PERIODIC LOAD
Goal. Development of methods and mathematical models, based on them, for the calculation of transients and steady-state modes of induction electric drives operating in periodic load mode. Methodology. The developed algorithms are based on a mathematical model of an induction motor, which takes into...
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| Format: | Article |
| Language: | English |
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National Technical University "Kharkiv Polytechnic Institute"
2020-06-01
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| Series: | Electrical engineering & Electromechanics |
| Subjects: | |
| Online Access: | http://eie.khpi.edu.ua/article/view/2074-272X.2020.3.02/206265 |
| _version_ | 1818892474833174528 |
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| author | V. S. Malyar O. Ye. Hamola V. S. Maday |
| author_facet | V. S. Malyar O. Ye. Hamola V. S. Maday |
| author_sort | V. S. Malyar |
| collection | DOAJ |
| description | Goal. Development of methods and mathematical models, based on them, for the calculation of transients and steady-state modes of induction electric drives operating in periodic load mode. Methodology. The developed algorithms are based on a mathematical model of an induction motor, which takes into account the saturation of the magnetic core and the displacement of current in the rotor bars. The processes are described by a system of nonlinear differential equations in the orthogonal axes x, y, which enables the results to be obtained with the smallest amount of calculations. The magnetization characteristics by the main magnetic flux and the leakage fluxes are used to calculate the electromagnetic parameters of the motor. To account for the current displacement in the rotor bars, the short-circuited winding is considered as a multilayer structure formed by dividing the bars in height by several elements. Results. Due to the variable load on the motor shaft, electromagnetic processes in both transient and steady state modes of the electric drive in any coordinate system are described by a system of nonlinear differential equations. The result of the calculation of the transients is obtained as a result of their integration time dependencies of coordinates (currents, electromagnetic torque, etc.) at a given law of change of the moment of loading. The proposed method of calculating steady-state mode is based on algebraization of differential equations on the mesh of nodes of the process cyclicity period and allows to obtain periodic dependencies in the time domain. Originality. The problem of calculating a steady-state periodic mode is solved as a boundary problem for a system of first-order differential equations with periodic boundary conditions, which allows to obtain instantaneous dependences during the period of currents, electromagnetic torque, capacities and other coordinates. Practical significance. Using the developed algorithm, it is possible to calculate the static characteristics of periodic processes as dependencies on different parameters of the cycle of periodic load or other coordinates, which is the basis for the choice of the motor for overload, power, heating, etc., as well as to detect the possibility of resonance. |
| first_indexed | 2024-12-19T17:57:17Z |
| format | Article |
| id | doaj.art-06bec38ce59843b7835c6df529dcb375 |
| institution | Directory Open Access Journal |
| issn | 2074-272X 2309-3404 |
| language | English |
| last_indexed | 2024-12-19T17:57:17Z |
| publishDate | 2020-06-01 |
| publisher | National Technical University "Kharkiv Polytechnic Institute" |
| record_format | Article |
| series | Electrical engineering & Electromechanics |
| spelling | doaj.art-06bec38ce59843b7835c6df529dcb3752022-12-21T20:11:46ZengNational Technical University "Kharkiv Polytechnic Institute"Electrical engineering & Electromechanics2074-272X2309-34042020-06-01391410.20998/2074-272X.2020.3.02MODELLING OF DYNAMIC MODES OF AN INDUCTION ELECTRIC DRIVE AT PERIODIC LOADV. S. Malyar0https://orcid.org/0000-0002-0843-6269O. Ye. Hamola1https://orcid.org/0000-0002-8402-2551V. S. Maday2https://orcid.org/0000-0001-9806-4755Lviv Polytechnic National UniversityLviv Polytechnic National UniversityLviv Polytechnic National UniversityGoal. Development of methods and mathematical models, based on them, for the calculation of transients and steady-state modes of induction electric drives operating in periodic load mode. Methodology. The developed algorithms are based on a mathematical model of an induction motor, which takes into account the saturation of the magnetic core and the displacement of current in the rotor bars. The processes are described by a system of nonlinear differential equations in the orthogonal axes x, y, which enables the results to be obtained with the smallest amount of calculations. The magnetization characteristics by the main magnetic flux and the leakage fluxes are used to calculate the electromagnetic parameters of the motor. To account for the current displacement in the rotor bars, the short-circuited winding is considered as a multilayer structure formed by dividing the bars in height by several elements. Results. Due to the variable load on the motor shaft, electromagnetic processes in both transient and steady state modes of the electric drive in any coordinate system are described by a system of nonlinear differential equations. The result of the calculation of the transients is obtained as a result of their integration time dependencies of coordinates (currents, electromagnetic torque, etc.) at a given law of change of the moment of loading. The proposed method of calculating steady-state mode is based on algebraization of differential equations on the mesh of nodes of the process cyclicity period and allows to obtain periodic dependencies in the time domain. Originality. The problem of calculating a steady-state periodic mode is solved as a boundary problem for a system of first-order differential equations with periodic boundary conditions, which allows to obtain instantaneous dependences during the period of currents, electromagnetic torque, capacities and other coordinates. Practical significance. Using the developed algorithm, it is possible to calculate the static characteristics of periodic processes as dependencies on different parameters of the cycle of periodic load or other coordinates, which is the basis for the choice of the motor for overload, power, heating, etc., as well as to detect the possibility of resonance.http://eie.khpi.edu.ua/article/view/2074-272X.2020.3.02/206265induction motorperiodic loadmathematical modelsteady-state dynamic modetransientstatic characteristicssaturation of the magnetic coredisplacement of current |
| spellingShingle | V. S. Malyar O. Ye. Hamola V. S. Maday MODELLING OF DYNAMIC MODES OF AN INDUCTION ELECTRIC DRIVE AT PERIODIC LOAD Electrical engineering & Electromechanics induction motor periodic load mathematical model steady-state dynamic mode transient static characteristics saturation of the magnetic core displacement of current |
| title | MODELLING OF DYNAMIC MODES OF AN INDUCTION ELECTRIC DRIVE AT PERIODIC LOAD |
| title_full | MODELLING OF DYNAMIC MODES OF AN INDUCTION ELECTRIC DRIVE AT PERIODIC LOAD |
| title_fullStr | MODELLING OF DYNAMIC MODES OF AN INDUCTION ELECTRIC DRIVE AT PERIODIC LOAD |
| title_full_unstemmed | MODELLING OF DYNAMIC MODES OF AN INDUCTION ELECTRIC DRIVE AT PERIODIC LOAD |
| title_short | MODELLING OF DYNAMIC MODES OF AN INDUCTION ELECTRIC DRIVE AT PERIODIC LOAD |
| title_sort | modelling of dynamic modes of an induction electric drive at periodic load |
| topic | induction motor periodic load mathematical model steady-state dynamic mode transient static characteristics saturation of the magnetic core displacement of current |
| url | http://eie.khpi.edu.ua/article/view/2074-272X.2020.3.02/206265 |
| work_keys_str_mv | AT vsmalyar modellingofdynamicmodesofaninductionelectricdriveatperiodicload AT oyehamola modellingofdynamicmodesofaninductionelectricdriveatperiodicload AT vsmaday modellingofdynamicmodesofaninductionelectricdriveatperiodicload |