Development of mathematical models of energy conversion processes in an induction motor supplied from an autonomous induction generator with parametric non-symmetry
Volodymyr Chenchevoi,Valeriy Kuznetsov,Vitaliy Kuznetsov,Olga Chencheva,Iurii Zachepa,Oleksii Chornyi,Maksim Kovzel,Viktor Kovalenko,Mykola Babyak,Serhii Levchenko +9 more
TLDR
In this article, a mathematical model of the induction generator-induction motor system with parametric asymmetry was developed to determine the quality of generated electricity in load operating modes, and the results of changes in the main characteristics of an induction motor at various degrees of parametric imbalance in the generator were presented.Abstract:
The paper presents studies of the system "induction generator-induction motor" with parametric asymmetry on a mathematical model to determine the quality of generated electricity in load operating modes. A mathematical model of the "induction generator-induction motor" system has been developed taking into account losses in steel and parametric asymmetry. The analysis of the transient characteristics of an induction generator when a motor load is connected in symmetrical and asymmetrical modes of operation is carried out. The results of changes in the main characteristics of an induction motor at various degrees of parametric asymmetry in the generator are presented. The quality of the generated electricity was analyzed based on the calculations of the unbalance coefficients for each of the operating modes. The assessment of the thermal state in steady-state conditions was carried out using an equivalent thermal equivalent circuit. Thermal transients were investigated when starting an induction motor from an autonomous energy source based on an induction generator. On a thermal mathematical model, the study of the effect of the output voltage asymmetry on the heating of the connected induction motor was carried out. It is shown that the asymmetry of the output voltage of an induction generator reaches 3–10 % and causes overheating of the windings in excess of the permissible values. A regression model has been developed for studying the operating conditions of an induction motor when powered by an induction generator with an asymmetry of the stator windings. The use of the obtained equations will make it possible to determine the most rational combination of factors affecting the heating of the stator windings of induction machines, in which they will not overheat above the maximum permissible temperature values of the corresponding insulation classesread more
Citations
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Journal ArticleDOI
Influence of misalignment of connection of electrical machine shafts on the nature of electric power of the induction motor
TL;DR: In this paper , a model of a three-phase induction motor with a short-circuited rotor has been made and the power components of the induction motor are analytically determined taking into account the power caused by torque vibrations on the shaft.
Proceedings ArticleDOI
Research of Energy Efficiency of Start-Up of Asynchronous Electric Drives With Scalar Frequency Control
TL;DR: In this paper , the authors discussed the features of the formation of the supply voltage of the frequency converter and the influence of the quality of the generated voltage on the performance of an adjustable electric drive.
Proceedings ArticleDOI
Study Of The Dynamics Of Solidification Of A Continuously Cast Ingot On The Improved Mathematical Model Of The Process Of Soft Compression
TL;DR: In this paper , a mathematical model of ingot solidification was developed, the numerical solution of which will make it possible to obtain the temperature field in the ingot cross section, and therefore, it is possible to more accurately obtain the exact parameters of soft reduction.
Journal ArticleDOI
The determination of induction motor losses in steel taking into account its saturation
TL;DR: In this paper , a method for assessing an induction machine steel as a function of the generalized electromotive force has been proposed, which allows taking into account higher harmonics of the current, which are caused by the presence of nonlinearity of an induction motor magnetic circuit.
Proceedings ArticleDOI
Research of Energy Efficiency of Start-Up of Asynchronous Electric Drives With Scalar Frequency Control
TL;DR: In this article , the authors discussed the features of the formation of the supply voltage of the frequency converter and the influence of the quality of the generated voltage on the performance of an adjustable electric drive.
References
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Book
Renewable Energy Systems: Design and Analysis with Induction Generators
M. Godoy Simões,Felix A. Farret +1 more
TL;DR: In this article, the authors present a detailed analysis of self-excited induction generators and their performance in terms of torque, power, and output current, and the relationship of air-gap voltage to magnetizing current.
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TL;DR: In this paper, two new models for specific power losses in cold-rolled motor lamination steel are described together with procedures for coefficient identification from standard multifrequency Epstein or single sheet tests, and a comparative study of the material models on three samples of typical steel, mathematical formulations for the extension from the frequency to the time domain, and examples of validation from electrical machine studies.
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Journal ArticleDOI
High-Speed Permanent Magnet Synchronous Motor Iron Loss Calculation Method Considering Multiphysics Factors
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Proceedings ArticleDOI
Correction of operating condition of a variable-frequency electric drive with a non-linear and asymmetric induction motor
TL;DR: It is shown that the application of this method of compensation for induction motor three-phase active power and electromagnetic torque oscillating components results in decrease of thermal overload at particular phases.
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