Method for determining a technical resource of the power transformer of traction substations under operating conditions

Matusevych, О. О.; Хворост, М. В.; Malysheva, V. V.

doi:10.15587/1729-4061.2017.103750

Cited by 4 publications

(2 citation statements)

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“…Reliability, durability, and controllability of electrical equipment is crucial. [16][17][18][19] The authors of Matusevych et al 16 developed a method for determining the residual technical life and expected life of a power transformer for railway traction substations. This method allows you to fully use the technical resource of the transformer, reduce economic costs and labor costs.…”

Section: Introductionmentioning

confidence: 99%

Elevating electric motor performance through rigorous vibration control and standardization

Arhun,

Hnatov,

Mygal

et al. 2024

Advances in Mechanical Engineering

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This study addresses the critical need for enhanced vibration control and standardization in electric motors, pivotal to the operational efficiency of electric vehicles and thus, environmental sustainability. Recognizing the gap in unified standards for managing machine vibration, we propose a novel, integrated framework combining advanced vibrodiagnostic techniques and rigorous standardization processes. Our methodology involves a detailed analysis of existing vibration control practices, identifying deficiencies in current standards, and presenting an improved, comprehensive guideline tailored to electric motors’ unique requirements in transportation applications. The innovation of our approach lies in its dual focus on technical precision and environmental sustainability, offering a significant leap forward in vibrodiagnostics. We demonstrate the framework’s practical value through its potential to revolutionize electric motor maintenance strategies, enhance machine longevity, and reduce environmental impact. This research contributes to the broader goals of reducing greenhouse gas emissions and advancing sustainable transportation, emphasizing the importance of vibration control standards in achieving energy efficiency and reliability in electric transport systems.

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Section: Introductionmentioning

confidence: 99%

Elevating electric motor performance through rigorous vibration control and standardization

Arhun,

Hnatov,

Mygal

et al. 2024

Advances in Mechanical Engineering

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“…At the same time, the static equations of motion of a multicomponent platform of a vibration machine must be unconnected, that is, autonomous, which is achieved struc turally at the stage of its creation. By analogy with [17], it is accepted that the resource of vibrationtransmitting elements is mainly influenced by dynamic characteristics, which depend on the nonlinear components of the equations describing the oscillations of the platform under conditions of manifestation of the imbalance of inertial forces of parts and assemblies of the test object. In this case, the centers of mass, stiffness, and damping of the mechanical system "platform-test object" do not coincide.…”

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confidence: 99%

Characteristics of elasticity, frequency, and stability of plate connecting assemblies for vibrating machines

Shpachuk,

Chuprynin,

Suprun

2024

Nauk. visn. nat. hirn. univ.

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Characteristics of elasticity, frequency, and stability of plate connecting assemblies for vibrating machines Print EmailUser Rating: / 0 PoorBest Category: Content №2 2024 Last Updated on 01 May 2024 Published on 30 November -0001 Hits: 4 SocButtons v1.4 Authors: V.P.Shpachuk*, orcid.org/0000-0002-1714-8648, O.M.Beketov National University of Urban Economy in Kharkiv, Kharkiv, Ukraine, e-mail: v.p.shpachuk@gmail.com O.O.Chuprynin, orcid.org/0000-0002-8757-559X, O.M.Beketov National University of Urban Economy in Kharkiv, Kharkiv, Ukraine, e-mail: sasha.chupr@gmail.com T.O.Suprun, orcid.org/0000-0002-9666-5909, O.M.Beketov National University of Urban Economy in Kharkiv, Kharkiv, Ukraine, e-mail: ms.suprun1989@gmail.com * Corresponding author e-mail: v.p.shpachuk@gmail.com повний текст / full article Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2024, (2): 082 - 087 https://doi.org/10.33271/nvngu/2024-2/082 Abstract: Purpose. To formalize the design of the elastic element of the connection unit of a multi-axis vibrating machine with a plate, in the form of internal cutouts and autonomous jumpers. To obtain the dependence of the stiffness of the plate elastic element in the direction of transmitted vibration on the modulus of elasticity of the plate material, the cross-sectional area of an individual lintel, its length, width, and thickness. To determine the limiting values of the forcing forces of the machine that satisfy the stability conditions of the jumpers of the plate package according to Euler. Methodology. When creating the configuration of an elastic element in the form of longitudinal bridges of an even number and modeling the stiffness characteristic of the joint, the methods of applied mechanics and the theory of material resistance were used. Findings. The basic results of the work include mathematical and physical modeling of the characteristics of elasticity, stability, and mutual influences in the working and combined directions in relation to the connection points of multi-coordinate vibration machines, which are implemented through flat multi-section plate elements. Taken together, this makes it possible to create energy-efficient vibration machines, to increase the accuracy of the program movement of their working body, which in turn increases: the productivity of mining equipment – in the extraction of minerals, and their reliability – in the case of mechanical tests. Originality. It consists of the fact that for the first time the dependence of the stiffness of the plate elastic element in the direction of transmitted vibration on the modulus of elasticity of the plate material, the cross-sectional area of an individual lintel, its length, width, and thickness were obtained. It is shown that the stiffness of the plate in the conjugate direction is directly proportional to the material’s modulus of elasticity, the width of the lintel, its thickness cubed, and is inversely proportional to the length of the lintel in the third degree. It is established that in order to ensure the stability conditions of the lintels of the plate package with respect to the limiting values of the forces of the vibration exciters of the machine, there is their directly proportional dependence on the number of plates in the package, the modulus of elasticity of the material, the width of the lintel and the thickness of the plate in the third degree, and is inversely proportional to the length of the jumper in the square. Practical value. For the first time, a structural mechanical model of an elastic element has been proposed, represented by a plate divided by internal straight slots into external and internal lintels identical in width and length. A real plate connection unit has been created, and its experimental stiffness characteristics depending on the number of plates in the package are given.

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Increasing the Efficiency of Lighting Systems as an Element of City Power Supply Systems

Hovorov,

Khvorost,

Hovorov

et al. 2024

2024 Ninth Junior Conference on Lighting (Lighting)

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Method for determining a technical resource of the power transformer of traction substations under operating conditions

Cited by 4 publications

References 4 publications

Elevating electric motor performance through rigorous vibration control and standardization

Elevating electric motor performance through rigorous vibration control and standardization

Characteristics of elasticity, frequency, and stability of plate connecting assemblies for vibrating machines

Increasing the Efficiency of Lighting Systems as an Element of City Power Supply Systems

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