Improving the accuracy of determining the parameters of induction motors in transient starting modes

Iegorov, Oleksiy; Iegorova, Olga; Miroshnyk, Oleksandr; Savchenko, Oleksandr

doi:10.6001/energetika.v66i1.4295

Cited by 25 publications

(14 citation statements)

References 5 publications

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“…Algebraic criteria are analytical and frequency criteria are grapho analytical [43][44][45]. At the same time, all criteria are based on the theory of the stability of technical systems developed by Lyapunov [46][47][48][49].…”

Section: Of 16mentioning

confidence: 99%

Methodological Approach in the Simulation of the Robustness Boundaries of Tribosystems under the Conditions of Boundary Lubrication

et al. 2023

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In the presented work, a methodical approach was developed for determining rational operation modes of tribosystems, taking into account their design. This approach makes it possible in the designing stage, according to the predicted operating modes, to calculate the limits and margins of stable work in operation. The definition of the robustness of the tribosystem and the criteria for assessing the robustness are formulated based on the theory of stability of technical systems. It is shown that such a methodical approach allows for determining the modes of the rational operation of the designed structures without damaging the friction surfaces. Experimental studies have proven that not all designs of tribosystems lose stability due to the appearance of friction surface burrs. There are designs where the loss of stability occurs upon the appearance of accelerated wear. The developed criteria take into account two options for the loss of stability. An experimental verification of the modes of loss of stability of tribosystems was performed by the appearance of a burr or the beginning of accelerated wear with the calculated values of the robustness criteria. The obtained results allow us to conclude that the modeling error is within 8.3–18.7%, which is a satisfactory result in the study of friction and wear processes. Robustness criteria is based on the coefficient of friction RRf and wear rate RRI, and must be used when designing new constructions of tribosystems. Theoretical calculations of such criteria and the dependence of their change on changing the predicted operating modes will allow for justifying rational operating modes within their stability.

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Section: Of 16mentioning

confidence: 99%

Methodological Approach in the Simulation of the Robustness Boundaries of Tribosystems under the Conditions of Boundary Lubrication

et al. 2023

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“…Faraday's law of electromagnetic induction is deployed for assessing the back EMF in relation to the time variation of MF (12). Through the MF density (13) the MF is attained on the crosssection surface in the coil, which has to be vertical to the MF path…”

Section: Optimal Slot-pole Combination Selection Using Esho Algorithmmentioning

confidence: 99%

“…With specific reference to vehicle traction drives, and the direct-drive wind power generators, the consequence of fractional-slot of winding (FSCW) PMMs is concentrated broadly and is spotlighted here [25]. The entire functions necessitate high torque quality [12,18]. Naturally, an electric machine is somewhat a conventionalist drive part that is improving slower than electronic components along with program control logic.…”

Section: Introductionmentioning

confidence: 99%

Research the Effect of the Fractional Number Slots of Pole on Wind Turbine Generation Using the Enhanced Spotted Hyena Optimization Algorithm

Aladwan,

Abdelrazzaq AL Dabbas,

Maqableh

et al. 2023

IAPGOS

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The design of machines with permanent magnets is actively developing day by day and is often used in wind energy. The main advantages of such variable speed drives are high efficiency, high power density and torque density. When designing a wind generator with two rotors and permanent magnets, it is necessary to solve such a problem as the correct choice of the number of poles and slots to increase efficiency and minimize the cost of the machine. In this work, an improved spotted hyena optimization algorithm is used to obtain the optimal combination of slots and poles. This optimization algorithm makes it possible to obtain the number of fractional slots per pole and evaluate the operating efficiency of a wind generator with a double rotor and ferrite magnets. At the first stage of machine design, various combinations of slots are installed. Next, the optimal combination is selected from various slot-pole combinations, taking into account the Enhanced Spotted Hyena Optimization (ESHO) algorithm, in which a multi-objective function is configured. Accordingly, the multi-objectives are the integration of reverse electromotive force, output torque, gear torque, flux linkage, torque ripple along with losses. Analysis of the results obtained shows that the proposed algorithm for determining the optimal slot combination is more efficient than other slot combinations. It has also been found that the choice of slot and pole combination is critical to the efficient operation of permanent magnet machines.

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“…Resource and durability [14] units and blocks that have passed bench tests, as well as individual structural elements, depends on the accuracy and reliability of multivariate model ing [15] and the reproduction of the normative mechanical load program at the control point of the platform. The latter, in turn, depends on the kinematic, dynamic and mechanical characteristics of the connection nodes of the oscillation ex citer tables with the vibration stand platform [16].…”

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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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Improving the accuracy of determining the parameters of induction motors in transient starting modes

Cited by 25 publications

References 5 publications

Methodological Approach in the Simulation of the Robustness Boundaries of Tribosystems under the Conditions of Boundary Lubrication

Methodological Approach in the Simulation of the Robustness Boundaries of Tribosystems under the Conditions of Boundary Lubrication

Research the Effect of the Fractional Number Slots of Pole on Wind Turbine Generation Using the Enhanced Spotted Hyena Optimization Algorithm

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

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