Method of diagnostics of the rotor eccentricity of an induction motor

Prudnikov, A. Yu; Bonnet, V. V.; Loginov, A.

doi:10.1088/1742-6596/1515/5/052030

Cited by 3 publications

(3 citation statements)

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“…We have proposed an eccentricity diagnosing method based on comparing the amplitude of the change in the rotational speed of the rotor of a technically serviceable A 1 motor with a similar amplitude of a motor with an eccentricity A 2 . Having obtained the difference of these amplitudes, ΔА, it is possible to estimate the magnitude of the eccentricity from empirical dependencies resulted from simulations and experiments [17], [23][24][25][26].…”

Section: Methodsmentioning

confidence: 99%

The results of the production tests of the method for diagnosing the eccentricity of the rotor of an asynchronous electric motor

et al. 2023

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Ensuring the reliability of electrical equipment in agriculture remains an urgent problem, since rugged operating conditions and aggressive environment hinder its rational use. The high accident incidence rate of asynchronous motors in most cases is invariably caused by the failure of the inter-turn insulation and interphase short circuit or short circuits to the housing. The probability of an emergency situation increases with an increase in the radial clearance in the bearings and, consequently, the occurrence of static eccentricity of the rotor. The developed method for diagnosing the static eccentricity of the rotor of an asynchronous motor is based on the analysis of the rotor speed; the amplitude of the rotor speed change was used as a diagnostic parameter. The paper presents the change in the rotation frequency depending on the difference in the amplitudes, resulted from the study conducted for different values of static eccentricity. The test results have shown that with an increase in the eccentricity of the rotor, the amplitude of the speed fluctuations increases.

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Section: Methodsmentioning

confidence: 99%

The results of the production tests of the method for diagnosing the eccentricity of the rotor of an asynchronous electric motor

et al. 2023

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“…The lower index s indicates stator affiliation, the index r indicates rotor affiliation, and the index μ is an affiliation to the magnetizing branch. The components of system (1) are given in detail in expressions (2) to (8).…”

Section: The Study Materials and Methodsmentioning

confidence: 99%

“…They are primarily associated with the choice of a coordinate system. The simplest approach is to build a mathematical model of an induction motor in single-phase coordinates [7,8]. A model of the induction motor in single-phase coordinates is effective under the condition of symmetry of all engine windings.…”

Section: Introductionmentioning

confidence: 99%

Improving a model of the induction traction motor operation involving non-symmetric stator windings

Goolak

Liubarskyi

Sapronova

et al. 2021

EEJET

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The analysis of operating conditions of induction traction motors as part of traction electric drives of electric locomotives reported here has revealed that they are powered by autonomous voltage inverters with asymmetric non-sinusoidal voltage. It was established that the induction motor operation may be accompanied by defects caused by the asymmetrical modes of the motor stator. A model of the induction motor has been proposed that takes into consideration changes in the values of mutual inductance of phases and complete inductance of the magnetization circuit due to changes in the geometric dimensions of the winding caused by a certain defect. An algorithm that considers the saturation of the magnetic circuit of the electric motor has been proposed. This approach to modeling an induction motor is important because if one of the stator's windings is damaged, its geometry changes. This leads to a change in the mutual inductance of phases and the complete inductance of the magnetization circuit. Existing approaches to modeling an induction motor do not make it possible to fully take into consideration these changes. The result of modeling is the determined starting characteristics for an intact and damaged engine. The comparison of modeling results for an intact engine with specifications has shown that the error in determining the controlled parameters did not exceed 5 %. The modeling results for the damaged engine demonstrated that the nature of change in the controlled parameters did not contradict the results reported by other authors. The discrepancy in determining the degree of change in the controlled parameters did not exceed 10 %. That indicates a high reliability of the modeling results. The proposed model of an induction electric motor could be used to investigate electromagnetic processes occurring in an electric motor during its operation as part of the traction drive of electric locomotives

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An Improvement of the Induction Traction Motor's Mathematical Model at Asymmetry of Stator Windings

Goolak

2023

Induction Motor Computer Models in Three-Phase Stator Reference Frames: A Technical Handbook

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The author proposes an improved version of the mathematical and computer model of a three-phase induction motor in the three-phase braked coordinates (in the three-phase stator reference frame), which proves the correctness of the starter winding asymmetry considerations in electrical machines. The chapter presents the parameters and characteristics of an induction traction motor type STA-1200 manufactured in Ukraine. A comparative analysis of the simulation results for intact and damaged motors has been carried out.

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Method of diagnostics of the rotor eccentricity of an induction motor

Cited by 3 publications

References 0 publications

The results of the production tests of the method for diagnosing the eccentricity of the rotor of an asynchronous electric motor

The results of the production tests of the method for diagnosing the eccentricity of the rotor of an asynchronous electric motor

Improving a model of the induction traction motor operation involving non-symmetric stator windings

An Improvement of the Induction Traction Motor's Mathematical Model at Asymmetry of Stator Windings

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