Кафедра "Електричні машини"

Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/3886

Офіційний сайт кафедри http://web.kpi.kharkov.ua/elmash

Кафедра “Електричні машини” була створена в 1921 році одночасно з першим в Україні електротехнічним факультетом у Харківському технологічному інституті. Засновником факультету і кафедри був видатний вчений електротехнік професор Павло Петрович Копняєв. Перший випуск студентів кафедри відбувся у 1924 році. У подальшому, за понад сторіччя, підготовлено понад 3000 інженерів для України та зарубіжжя.

Кафедра входить до складу Навчально-наукового інституту енергетики, електроніки та електромеханіки Національного технічного університету "Харківський політехнічний інститут".

У складі науково-педагогічного колективу кафедри працюють: 2 доктора технічних наук, 5 кандидатів технічних наук, 1 доктор філософії; 1 співробітник має звання професора, 5 – доцентів.

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Calculation of the transformers and electric machines characteristics
(National Technical University "Kharkiv Polytechnic Institute", 2024-10-24) Shevchenko, V. V.; Dunev, О. О.
These guidelines are intended to perform the calculation and graphic task "Calculation of the characteristics of transformers and electric machines" in the discipline "Electric machines".
Formation of valeological competence in conditions of classroom and distance learning
(Харківськии̮ національнии̮ університет ім. В. Н. Каразіна, 2022) Shevchenko, A. S.; Kucherenko, Serhii; Komyshan, Anatolii; Shevchenko, V. V.; Kucherenko, Nataliia
Formulation of the problem. The article considers the problem of valeological (health saving) competence formation in non-medical students. Health saving competencies are based on a healthy lifestyle, safe behavior practices and the ability to provide emergency pre-hospital care to victims in critical situations. The formation of valeological competence in non-medical takes place during the study of valeological disciplines (including “Fundamentals of Medical Knowledge”, “Health Pedagogy” and others) in higher education institutions (HEI). Since the spring of 2019, the teaching of these disciplines is forced to take place in distance form.
Calculation of the transformers and electric machines characteristics
(National Technical University "Kharkiv Polytechnic Institute", 2021) Shevchenko, V. V.; Domochka, Lidiia Vladyslavivna
This edition is dedicated to the implementation of calculation task "Calculation of the transformers and electric machines characteristics" on the discipline "Electric machines". The purpose of this discipline is to consolidate theoretical knowledge and develop practical skills for calculating the characteristics of transformers, alternation current (AC) electric machines and direct current (DC) electric machines. The objects of study are transformers and electric machines, which are the basis of electric power in various industries. The subject of this discipline are the electric machines, which are used in practice to convert one form of energy into another: mechanical energy to electrical (the generators), electrical energy to mechanical (the engines), and power transformers, which are used to convert the meanings of alternating current and voltage. After training, the student must know the structure, basic elements of the transformers and electric machines, there operation principle and characteristics, peculiarities of motors starting, the ways of rotation frequency control and braking. The student should be able to evaluate new electrical equipment, take into account technical and economic requirements. This assignment consists of five tasks. For each part, control questions and tasks are formulated, recommendations for their solution are given. Calculation tasks are the student’s final document to complete the discipline. The report on the done work must be finished in written form and defended by the examination date. The tasks and the volume of the work must be agreed by the lecturer of this discipline. The report should begin with a cover page, the sample of which is given in Appendix A. When drawing up a report, it is necessary to formulate the task, show the procedure for performing calculations: write down a formula, and then put numbers in this formula and show the result of the calculation. The report should contain the necessary diagrams and graphs. At the end of the report student has to give the list of information sources used in the work. Graphs and diagrams should be built on graph paper, indicating the scale and dimension of the physical quantity on the axes. If the graph was built on a regular sheet of paper, then a uniform "grid" should be drawn on the graph field. Students choose the number of a variant for the work according to the number in the academic group list. New modern notation symbol system of electrical, magnetic, mechanical and energy values, which correspond to the state standards, are used in this study course.
Methodical instructions for laboratory works on the discipline "Electric machines"
(National Technical University "Kharkiv Polytechnic Institute", 2019) Shevchenko, V. V.; Duniev, O. O.; Shilkova, L. V.; Lazareva, O. Ya.
The edition is dedicated to expand the theoretical knowledge of foreign students on the "Electrical machines" discipline. The objects of study are transformers and electric machines, which are the basis of electric power in various industries. The subject of this course is electric machines, which are used in practice to convert one form of energy into another: mechanical to electrical (generators), electrical to mechanical (electric motors), power transformers, which convert the AC parameters, current and voltage.
To the question of formation of engineering educational standards taking into account competence and the Bologna model
(Донецький національний технічний університет, 2019) Shevchenko, V. V.; Shevchenko, A. S.
Ukraine is reforming the system of higher engineering education to improve its quality and eliminate the shortage of engineering personnel. New curricula should be formed taking into account the Bologna model and competencies. The basis of the new education standards is to put the existing training modules of the Ukrainian and foreign universities of the countries participating in the Bologna process.
Analysis of electromagnetic vibration forces in the elements of the turbogenerator stator fastening to the case in non-nominal operation modes
(НТУ "ХПИ", 2018) Shevchenko, V. V.; Minko, A. N.; Strokous, A. V.
Purpose. The purpose of the paper is to determine the value of additional electromagnetic forces (EMF) that are created by the fluxes of scattering of the back of the turbogenerator (TG) stator core in the elements of its fastening to the case when operating in non-nominal modes according to the vibration control data. Methodology. The paper used the theory of electromagnetic fields, the method of polynomial approximation, mathematical modeling in the MathCAD-2000 professional package and the provisions of the general theory of electrical machines. Results. Analytical and numerical calculations of additional EMF values are performed, which were created by the leakage fluxes of the back of the stator core in the elements of fastening of the TG to the case when operating in non-nominal modes, which is determined by the need for night unloading of the power system. The values of these TG forces are established with a change in the output and consumption of reactive power and with a change in voltage. Originality. For the first time for TGs operating in non-nominal modes, the estimation and calculation of additional EMF in the elements of the TG core fastening to the case are carried out, which are created by the leakage fluxes of the back of the stator core and supplement the action of the basic EMF. The definition of these forces is relevant, because turbogenerators of TPPs in Ukraine with a capacity of 200-300 MW are maneuvering capacities and solve the problem of maintaining the power factor of the power system. Practical value. It was found that if the TGs often operate in non-nominal modes, the wear of the stator core fastening systems to the case is more significant than in the case of their operation only in nominal modes. The obtained data will allow to more accurately determine the scope of repair work, draw up schedules for their implementation, determine the locations of the sensors for monitoring, and can be used at the design stage of new machines.
Turbogenerators of new generation with various cooling systems
(Національний університет біоресурсів і природокористування України, 2018) Minko, A.; Shevchenko, V. V.
The features of the turbogenerators with different types of cooling (air, hydrogen, water) are discussed.
Modeling of the temperature state of turbogenerators in the medium of SolidWorks
(Національний університет біоресурсів і природокористування України, 2018) Shevchenko, V. V.; Semenyutin, D. G.
Discusses issues of designing thermal processes of turbоgenerators using SolidWorks software, both when creating new ones and when upgrading and repairing existing turbоgenerators.
Effectiveness in use of molten pool heat
(International Association "Welding", 2001) Dmitrik, V. V.; Shevchenko, V. V.
Method for estimation of the amount of the arc heat introduced into parent metal and transferred with the liquid metal. Hows from the head to the tail portion of the weld pool is suggested. It is shown that the efficiency in use of the molten pool heat can be increased by using an extra filler metal and selecting the optimum parameters of welding.
Proposals for Improving the Technical State of Turbogenerators in Excess of the Service Life
(Kremenchuk Mykhailo Ostrohradskyi National Universityrs, 2017) Shevchenko, V. V.
The state of the world economy, the global economic crisis determined that the first priority in making engineering decisions is economic profitability. This affected on the state and development of the electric power industry, in particular, on the operational policy of repairs and the implementation of replacement schedules for turbogenerators that have fulfilled the service life. Therefore, the main worldwide trend of the development of energy systems and turbine generators was not the replacement of equipment that had worked its life, but the extension of the terms of his work.