scholarly journals The effect of the initial size on the height of the crank press die

2021 ◽  
Vol 82 (4) ◽  
pp. 32-39
Author(s):  
A. K. Tuleshov ◽  
◽  
G. Ya. Panovko ◽  
B. I. Akhmetov ◽  
◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Asynchronous Motor ◽  
Elastic Compliance ◽  
Technological Capabilities ◽  
Initial Size ◽  
Kinematic Synthesis

The expansion of the technical and technological capabilities of forging and stamping machines and equipment can be carried out through the introduction of new designs of actuators with wide functionality. These developments require solving the problems of kinematic synthesis and analysis of mechanisms. In this work a comparative analysis of the endurance indicators of a crank press with the mechanism for transforming the motion of Stephenson II depending on the elastic compliance of the connecting rods and the deformation of the forging was shown. In this regard, the features of the kinematics of a crank press driven by an asynchronous motor taking into account the flexibility of the connecting rods and the workpiece was investigated.

Method for Determining the Parameters of an Induction Motor

2021 ◽  
Vol 64 (1) ◽  
pp. 30-36
Author(s):  
Yuri Kulinich ◽  
◽  
Sergey Shuharev ◽  
Alexander Kaminsky ◽  
Sergey Kovalenko ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Induction Motor ◽  
Asynchronous Motor ◽  
Rotation Frequency ◽  
Engineering Practice ◽  
Experimental Stand ◽  
Electromagnetic Moment ◽  
Stable Part ◽  
Pie Chart ◽  
New Iterative Method

The paper proposes a new iterative method for determining the parameters of an induction motor. The method is based on the measured values of no-load current and active resistance of the stator winding. The calculated parameters are used to build the mechanical characteristics of the engine. To assess its accuracy, a comparative analysis with a pie chart was carried out. In the practical part of the work, on the basis of the experimental stand, measurements were made of the magnitude of the electromagnetic moment of the investigated asynchronous motor AIR71A4 at different values of the rotation frequency on the stable part of the mechanical characteristic. In a comparative analysis of the calculated and experimental data, it was found that the proposed method has sufficient accuracy in calculating the primary parameters of the engine. This provides a basis for the practical use of the proposed calculation method in engineering practice

Study Of Innovative Susceptibility Of Low Potentional Energy Technologies In Ukraine

2021 ◽  
Vol 38 (4) ◽  
Author(s):  
Vitalina Babenko ◽  
Yalyzaveta Koniaieva ◽  
Liudmyla Yevchuk ◽  
Olena Dikan ◽  
Iryna Tokmakova ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Potential Energy ◽  
Heat Generation ◽  
Low Grade ◽  
Technological Capabilities ◽  
Advantages And Disadvantages ◽  
Energy Technologies ◽  
Specific Factors ◽  
Business Entities

The article discusses the formation of innovative susceptibility of enterprises to low-potential energy (LPE) technologies, including measures to increase the innovative susceptibility (IS) of enterprises based on a comparative analysis of the levels of comprehensive awareness of production and business entities on the advantages and disadvantages of heliosytem technology of a heat generation profile (HS HGP). The study shows systematization and balancing of general and specific factors that shape the innovative susceptibility of enterprises to low-grade energy technologies. There are calculated indexes for assessing the awareness of the technical, economic and environmental-technological capabilities of technology HS HGP. Presented the scheme of formation and implementation of IS enterprises to the LPE technologies.

scholarly journals Research of control systems for lifting and transport mechanisms

2021 ◽  
Vol 23 (3) ◽  
pp. 47-61
Author(s):  
T. V. Sinyukova ◽  
V. N. Meshcheryakov ◽  
A. V. Sinyukov
Keyword(s):  
Comparative Analysis ◽  
Electric Drive ◽  
Frequency Control ◽  
Frequency Converter ◽  
Asynchronous Motor ◽  
Point Of View ◽  
Asynchronous Motors ◽  
Drive Systems ◽  
Improved Characteristics ◽  
Energy Components

THE PURPOSE. To investigate the existing methods of frequency control and their influence on the characteristics of the asynchronous motor, including the energy parameters. Consider new circuit solutions of the control type under study. Create a mathematical model of each of the methods of frequency control. To analyze the results obtained from the point of view of the behavior of mechanical, electromechanical and energy components. METHODS. When solving this problem, the method of computer simulation modeling, implemented by means of Matlab Simulink, was used. RESULTS. In this paper, various aspects of electric drive systems based on asynchronous motors with the use of cascade switching are studied and described, existing connection schemes for such systems are analyzed, and several new options with improved characteristics are proposed. A comparative analysis of various connection schemes is made, the most interesting results of such analysis are presented, and conclusions are drawn about the future prospects of certain circuit solutions.Electric drive systems were modeled in the Simulink MATLAB environment using software tools to demonstrate the operation parameters of the considered circuits. CONCLUSION. Various schemes for switching on the asynchronous motor in the Simulink Matlab environment were investigated. The results of the study revealed the potential usefulness of using a circuit with a transformer in the rotor circuit, as well as the construction of a multi-motor electric drive with a common transformer and a common frequency converter circuit. The efficiency of parallel connection of rotary circuits of a two-motor electric drive was demonstrated. The methods of returning the sliding energy to the network are also compared, and their effectiveness in a comparative analysis with the operation in the closed-loop rotor mode is demonstrated.

A Comparative Analysis of Transient Processes in an Asynchronous Motor

2018 ◽  
Vol 89 (3) ◽  
pp. 137-142 ◽  
Author(s):  
V. A. Denisov ◽  
M. N. Tret’yakova ◽  
O. A. Borodin
Keyword(s):  
Comparative Analysis ◽  
Asynchronous Motor ◽  
Transient Processes

Study of the elastic properties of hexagonal metal single crystals

2019 ◽  
Vol 85 (9) ◽  
pp. 29-35
Author(s):  
V. V. Krasavin ◽  
A. V. Krasavin
Keyword(s):  
Comparative Analysis ◽  
Single Crystal ◽  
Single Crystals ◽  
Elastic Properties ◽  
Elastic Compliance ◽  
Crystallographic Direction ◽  
Nuclear Industry ◽  
Hexagonal Axis ◽  
Metal Single Crystals ◽  
Hexagonal Metals

Hexagonal metals (e.g., Be, Zr, Ti) are widely used in the nuclear industry, space and aircraft engineering (in manufacturing of the structural elements operating under extreme conditions). A promising way to improve the quality of products made of them is to improve the physical properties of materials using the natural anisotropy of metal single crystals. The results of studying anisotropy and a comparative analysis of the technical characteristics of the elastic properties of single crystals of hexagonal metals are presented. The equations of the elastic compliance matrix components are derived in the explicit form for arbitrary crystallographic direction proceeding from transformations of the elastic compliance tensor in the principal axes to a new arbitrary coordinate system with a subsequent use of Euler angles. Analytical expressions are presented for the technical characteristics of the elastic properties (shear and Young's moduli, Poisson's ratio) of the single crystals of 10 hep metals for an arbitrary crystallographic direction. The axial symmetry of the characteristics about the hexagonal axis is revealed. The sums of the elastic compliance coefficients which determine the shear moduli and the Poisson's ratios in two mutually perpendicular directions are constant in any crystallographic plane of the single crystal. A comparative analysis of the anisotropy of the elastic properties of single crystals of the studied group of metals revealed auxetic properties of Zn and Be single crystals and the region of crystallographic directions of uniaxia tension, leading to an auxetic effect The auxetic effect in Zn was observed under tension in the directions of the plane perpendicular to the hexagonal axis of the single crystal. The planes of the auxetic effect manifestation in Be single crystals are perpendicular to the directions making an angle of 45° with the hexagonal axis.

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