Кафедра електричної інженерії (ІПБТ)
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UK: Кафедра електричної інженерії (Інститут промислових та бізнес технологій, ІПБТ)
EN: Department of Electrical Engineering (IIBT)
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Browsing Кафедра електричної інженерії (ІПБТ) by Subject "asynchronous motor"
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Item Enhancing Power Quality within the Context of Industrial Enterprises: Strategies for Improvement(ScientificWorld-NetAkhatAV, Karlsruhe, Germany, 2023) Tryputen, Mykola; Kuznetsov, Vitaliy V.; Nikolenko, Anatoliy V.ENG: The paper analyzes negative impact of poor-quality electricity on the performance of electrical installations. Particular attention is paid to the ways to improve power quality under the conditions of industrial enterprises. Use of “individual” LC-filters to protect extra important electric drives; use of “group” devices to compensate negative effect of noisy electricity at a workshop level (power active rectifiers are meant with their potential integration into the available converters for the controlled electric drives); and to inhibit voltage distortions within the areas of their origination (i.e. the mains protection against the root cause) are possible means to solve the problems.Item Identification of the Thermal Process in an Induction Motor(Dnipro University of Technology, Dnipro, Ukraine, 2022) Kuznetsov, Vitalii V.; Tryputen, M.; Nikolenko, Anatolii V.; Tsyplenkov, D.; Kuvaiev, Victor; Savvin, Oleksandr V.ENG: Purpose: synthesis of a mathematical model of an asynchronous motor, taking into account the impact of changes in the quality of electricity on the processes of heating and heat exchange for an economically justified choice of means of protection. Methodology: Theoretical substantiation of the expediency of using a one-mass thermal model of an asynchronous motor, for the conditions of operation of the latter in conditions of low-quality electricity, in order to determine losses in it. Results: Experimental studies of the operation of an asynchronous motor at nominal load were carried out. The obtained results of the measurements made it possible to determine the parameters of the single-mass thermal model, the heat transfer coefficient of the engine, and the coefficient of its heat capacity. A single-mass thermal model of an induction motor is a mathematical model used to describe the thermal processes occurring in an induction motor. This model is based on the assumption that all motor elements can be combined into one mass that heats up during engine operation. The model assumes that the thermal capacity of the motor is a constant, and the heat flow that is released during the operation of the motor is proportional to the square of the current passing through the motor windings. In addition, the model assumes the presence of thermal conductivity between the mass of the motor and the external environment, which affects the rate of heat dissipation. Scientific novelty: A methodology for determining losses in an asynchronous motor using a synthesized mathematical model is proposed, taking into account the influence of changes in the quality of electricity on the processes of heating and heat exchange in it. Practical significance: The obtained results indicate the adequacy of the proposed thermal model of an asynchronous motor operating in a network with low-quality electricity. Taking into account the fact that for many types of engines in the reference literature, there are no necessary data on the coefficients of heat transfer and heat capacity, and only the thermal time constants for certain types of engines are given, the value of the specified parameters of the model can be obtained on the basis of the methodology presented in the work. A single-mass thermal model can be useful for analyzing the thermal processes occurring in an induction motor and for improving the efficiency of the motor. In particular, it can help determine the optimal operating temperature of the motor, as well as calculate the necessary cooling system to ensure stable operation of the motor under conditions of variable load and temperature conditions.Item On the Feasibility of Choosing Means of an Asynchronous Motor Protection in Industrial Conditions(ScientificWorld-NetAkhatAV, Karlsruhe, Germany, 2023) Tryputen, Mykola; Kuznetsov, Vitaliy V.ENG: The article is devoted to the urgent problem of choosing the means of protection of asynchronous motors (AM) operating in the shop electric networks of industrial enterprises with low-quality electricity. The well-known energy-economic model of an induction motor is presented in the form of a predicate disjunction, to which we apply the pattern recognition algorithm for making decisions. The main advantage of the predicate model is openness and the possibility of accumulating knowledge about the operating modes of electromechanical equipment. The practical implementation of training, adaptation, minimization of the predicate model and the search on its basis for the best option for protecting an asynchronous motor in high-level algorithmic languages involves the processing of large amounts of data. It is shown that elements of predicate equations can be represented as a relational data model and use operations - algebras for its transformations. The transformation procedures are easily integrated into the information and software structures of the automated enterprise management structure, which use database management systems oriented to relational models.Item Проблеми побудови асинхронних електроприводів зі спостерігачами стану(Національна металургійна академія України, ІВК «Системні технології», Дніпро, 2021) Стьопкін, Василь Володимирович; Юдін, О. В.; Котляр, М. В.; Паламарчук, О. О.UKR: У даній роботі розглядаються проблеми побудови асинхронних електроприводів зі спостерігачами стану та останні досягнення в області бездатчикових приводів змінного струму. Визначено основні сфери застосування асинхронних електроприводів зі спостерігачами стану. В якості базової при розгляді конструкцій сучасних асинхронних електроприводів використано векторну безсенсорну систему керування з використанням перетворювачів координат із природної системи координат у нерухому та обертову та спостерігача стану на основі математичної моделі двигуна у двофазній стаціонарній системі координат. Розглянуто основні типи спостерігачів потоку та швидкості асинхронних електроприводів для задач побудови якісного асинхронного електроприводу з векторним керуванням без використання датчиків. Сформульовано задачу подальшої модернізації систем керування на основі електроприводу зі спостерігачем витрати та швидкості.