Selecting the Parameters of The Diagnosis of Frame Insulation Condition in Electrical Machines of Locomotives

Капица, М. И.; Laguta, Vasiliy V.; Kozik, Yuriy

doi:10.14419/ijet.v7i4.3.19718

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…The relationship between a locomotive readiness coefficient, performance indicators, and a maintenance system has been confirmed by authors in [8]. Paper [9] addresses the choice of diagnostic parameters for the insulation of traction electric motors in locomotives. The cited paper explores the technical condition of insulation using non-destructive control methods.…”

Section: G Imentioning

confidence: 83%

“…During the operation of the locomotive, a data stream is generated, in which it is necessary to highlight the information components of the changing technical condition of the object to be diagnosed. Our review of studies [5][6][7][8][9][10][11] suggests that, despite a significant body of research in this area, the task of selecting the most informative diagnostic features continues to be relevant. The focus of further research development would be to select the most informative components in order to automate and accelerate the interpretation of diagnostic results.…”

Section: G Imentioning

confidence: 99%

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Devising a procedure to form the diagnostic parameters for locomotives using a principal components analysis

Bodnar

Очкасов

2021

EEJET

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Modern diagnostic systems are characterized by that the flow of diagnostic information requires significant computational resources to process. In order to improve the reliability of the object to be diagnosed and reduce operating costs, it is necessary to improve procedures for analyzing diagnostic results. This paper suggests a procedure to form the diagnostic features of locomotive nodes based on the use of a principal components analysis. The proposed approach is distinguished by a decrease in the dimensionality of the input set of diagnostic features in order to select the sets of interconnected diagnostic parameters. Based on the selection of the sets of interconnected diagnostic features, constructing new latent diagnostic parameters has been proposed. A latent diagnostic parameter contains information that combines data from several initial diagnostic features. The result of the method is a set of latent diagnostic parameters that do not correlate with each other and reflect the behavior of the object to be diagnosed from different technical points. The application of a sufficient number of latent diagnostic parameters involved the scree test method. This paper reports the results from using the proposed approach for treating the results from diagnosing the hydraulic transmissions in locomotives. The result from applying the procedure has made it possible to propose using three latent diagnostic parameters to assess the technical condition of a locomotive’s hydraulic transmission during bench tests. The suggested parameters contain 90 % of the original information and reflect losses in the transmission, as well as the load at the input and output of the transmission.

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Section: G Imentioning

confidence: 83%

Section: G Imentioning

confidence: 99%

Devising a procedure to form the diagnostic parameters for locomotives using a principal components analysis

Bodnar

Очкасов

2021

EEJET

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“…The recognition whether the tested frame insulation belongs to a cluster in accordance with equation 7- (8) should be applied at the initial stage. When clusters contain a sufficient number of elements, then it is more appropriate to perform discriminant analysis.…”

Section: Resultsmentioning

confidence: 99%

“…Several methods of dielectric diagnostics were developed to assess the insulation condition: polarization and depolarization current measurement (PDC  polarization and depolarization current) [5], frequency domain spectroscopy (FDS) [6], recovery voltage measurement (RVM), [7,8]. Measuring of the recovery voltage is a good method for obtaining information on the insulation condition.…”

Section: Literature Reviewmentioning

confidence: 99%

Classification of quality conditions of a traction motor frame insulation of locomotives

Капица

Laguta

Kozik³

2019

MATEC Web Conf.

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The objective of the article is to determine the quality conditions of a locomotive traction motor frame insulation based on observations over the recovery voltage and classification of a tested insulation wear degree as well as to determine estimates of operating time until the insulation restoration or replacement with a new one. To classify the insulation quality conditions and to forecast its residual life until the restoration, a cluster analysis and discriminant analysis are used based on indicators reflecting the properties of an insulation recovery voltage curve. The study defines an information content received from frame insulation recovery voltage readings as compared with its resistance from the perspective of testing the insulation condition and predicting its residual life. Statistical characteristics of clusters corresponding to the insulation condition stages allow determining the limit values of predicting parameters and estimating the residual insulation life prior the restoration. To classify the insulation condition, an integrated evaluation of the insulation condition quality is proposed. Integrated evaluation is performed according to the recovery voltage curve and is used as an indicator during clustering. An experimental study of the proposed method practically confirmed its effectiveness.

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Determination of a Restoration Periods of a Frame Insulation of Tm Ed-118a by Recovery Voltage Observations

Лагута¹,

Kozik²

2020

STP

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Purpose. The aim of the research is to improve the maintenance system of a traction motor (TM) ED-118A by predicting the life of a frame insulation and determining recovery moments while ensuring the lowest unit costs for performing a major repairs of a volume 1 (MjR-1) and permanent repair of a volume 3 (PR-3), taking into account the degree of recovery, using data on the insulation state by the recovery voltage method in the operation process. Methodology. The problem of determining the service life of the frame insulation and the corresponding moments of its recovery for the traction motor is formulated as an optimization problem. The criterion in the task is the minimum of the total unit costs for the implementation of PR-3 and MjR-1 during the period from the last MjR-2 (a major repairs of a volume 2) to the next MjR-2. Findings. The maximum value of the recovery voltage and the value of the integral estimate introduced are indicators characterizing the state of the frame insulation of the TM. As an indicator of the insulation state, an integral estimate is adopted, which is constructed by measuring the recovery voltage. Factories carrying out repairs of frame insulation have different quality of its restoration, which affects the unit cost of restoration and insulation service life. Originality. The optimization procedure takes into account the degree of insulation recovery when performing PR-3 and performing MjR-1. Modeling of the insulation service life and the recovery period of the PR-3 is based on measurements of the recovery voltage of the casing insulation, depending on the mileage. Practical value. The values of the integral indicator considered in the problem, changes in the recovery voltage of the casing insulation in the current measurement procedure, at which MT diagnostics are performed, can be used to predict the service life and simulate the moments of insulation recovery, as well as the maximum values of the recovery voltage in the current measurement procedure in accordance with mileage of a locomotive.

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Selecting the Parameters of The Diagnosis of Frame Insulation Condition in Electrical Machines of Locomotives

Cited by 3 publications

References 2 publications

Devising a procedure to form the diagnostic parameters for locomotives using a principal components analysis

Devising a procedure to form the diagnostic parameters for locomotives using a principal components analysis

Classification of quality conditions of a traction motor frame insulation of locomotives

Determination of a Restoration Periods of a Frame Insulation of Tm Ed-118a by Recovery Voltage Observations

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