Зміст
Добірка наукової літератури з теми "Електромагнітна система"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Електромагнітна система".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Статті в журналах з теми "Електромагнітна система"
Бєлоха, Г. С. "Перетворювач частоти в системі генерування енергії вітроенергетичних установок". ВІСНИК СХІДНОУКРАЇНСЬКОГО НАЦІОНАЛЬНОГО УНІВЕРСИТЕТУ імені Володимира Даля, № 7 (263) (10 грудня 2020): 35–39. http://dx.doi.org/10.33216/1998-7927-2020-263-7-35-39.
Повний текст джерелаБатигін, Юрій Вікторович, Світлана Олександрівна Шиндерук, Марина Андріївна Волосюк, Євген Олександрович Чаплигін та Микита Михайлович Бондаренко. "Електромагнітні поля у плоскій індукторній системі з масивними біфілярними котушками". Технічна інженерія, № 1(87) (16 червня 2021): 91–97. http://dx.doi.org/10.26642/ten-2021-1(87)-91-97.
Повний текст джерелаDrabych, P. P. "The IMK-5 Electromagnetic Searching-Measuring System." Nauka ta innovacii 2, no. 5 (September 30, 2006): 41–52. http://dx.doi.org/10.15407/scin2.05.041.
Повний текст джерелаДакі, О. А., В. М. Іваненко, В. М. Федунов та О. В. Бажак. "Електромагнітна сумісність систем зв’язку та оповіщення у надзвичайних ситуаціях на морі". Системи озброєння і військова техніка, № 2(66) (21 травня 2021): 37–43. http://dx.doi.org/10.30748/soivt.2021.66.05.
Повний текст джерелаДакі, О. А., В. М. Іваненко, В. М. Федунов та О. В. Бажак. "Електромагнітна сумісність систем зв’язку та оповіщення у надзвичайних ситуаціях на морі". Збірник наукових праць Харківського національного університету Повітряних Сил, № 2(68) (21 квітня 2021): 38–44. http://dx.doi.org/10.30748/zhups.2021.68.05.
Повний текст джерелаКрохмаль, Тетяна Миколаївна, та Олександр Миколайович Нікітенко. "Використання системи комп’ютерної математики Maple в курсі «Технічна електродинаміка»". Theory and methods of e-learning 3 (10 лютого 2014): 148–52. http://dx.doi.org/10.55056/e-learn.v3i1.332.
Повний текст джерелаМакаров, C. А., О. М. Чекунова та С. П. Бєляк. "Методика оцінки завадостійкості системи зв’язку Повітряних Сил". Системи озброєння і військова техніка, № 1(61), (14 травня 2020): 128–37. http://dx.doi.org/10.30748/soivt.2020.61.15.
Повний текст джерелаГаценко, Сергій, Костянтин Сапожников, Віталій Сташко та Єфім Сейфетдінов. "Підхід до побудови багатопозиційної системи місцевизначення джерел радіовипромінювання". Сучасні інформаційні технології у сфері безпеки та оборони 42, № 3 (17 грудня 2021): 31–36. http://dx.doi.org/10.33099/2311-7249/2021-42-3-31-36.
Повний текст джерелаRozen, Y. "Електромагнітна сумісність компонентів інформаційних та керуючих систем (2): стійкість до електромагнітних завад". Nuclear and Radiation Safety 11, № 4 (10 грудня 2008): 58–76. http://dx.doi.org/10.32918/nrs.2008.11-4(40).08.
Повний текст джерелаBodnar, G. J., O. V. Shapovalov, J. I. Fedyshyn та T. V. Hembara. "МАТЕМАТИЧНЕ МОДЕЛЮВАННЯ ПРОЦЕСІВ В ЕЛЕКТРОПРИВОДІ ВОДЯНОГО НАСОСА З АКУМУЛЯТОРНИМИ БАТАРЕЯМИ". Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 18, № 2 (9 вересня 2016): 11–20. http://dx.doi.org/10.15421/nvlvet6803.
Повний текст джерелаДисертації з теми "Електромагнітна система"
Римар, Сергій Іванович, Борис Іванович Кубрик та Андрій Олександрович Зуєв. "Електромагнітна система КХ діапазону для вимірювання параметрів і регенерації сорбентів". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/46112.
Повний текст джерелаКозачук, Анна Дмитрівна. "Автоматична система розрахунку захисного екрану на основі залізорудного пилу із заданими властивостями". Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/36629.
Повний текст джерелаThis thesis is devoted to the development of an automatic system for calculating the protective screen based on iron ore dust with specified properties. Purpose: to develop a software product that, based on the entered data, calculates a protective screen based on iron ore dust with the specified properties and displays the result on the screen in the form of two- or three-dimensional graphs. Microsoft Visual Studio development environment, C # and C programming languages, MySQL database management system and XAMPP web server were used. The graphical interface of the software product is created. Implemented software system modules. The created program was tested.
Данная дипломная работа посвящена разработке автоматической системы расчета защитного экрана на основе железорудного пыли с заданными свойствами. Цель работы: разработать программный продукт, который на основании введенных данных рассчитывает защитный экран на основе железорудной пыли с заданными свойствами и выводит результат на экран в виде двух- или трехмерных графиков. Использована среда разработки Microsoft Visual Studio, языки программирования C # и C, система управления базами данных MySQL и веб-сервер XAMPP. Создан графический интерфейс программного продукта. Реализовано модули программной системы. Проведена апробация созданной программы.
Король, Олена Геннадіївна. "Удосконалення системи форсованого керування електромагніта вакуумного контактора за допомогою електронної системи". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/49147.
Повний текст джерелаDissertation for the degree of Candidate of Technical Sciences in specialty 05.09.01 "Electric Machines and Apparatus" (14 – Electrical Engineering) – National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2020. The dissertation is devoted to the improvement of the forced control system of the low voltage vacuum contactor monostable electromagnet with the help of the electronic system in particular regarding increase of the reliability (failure-free operation) and service life of the device, and also improvement of the designs of the gas distribution valves of launch vehicles in the conditions of the forced modes due to the proved technical solutions and recommendations. To achieve this goal the following tasks are set: – to review and analyze the designs of low voltage vacuum contactors and their forced control systems with starting and holding shunt windings; – to review and analyze the designs of gas distribution valves of launch vehicles; – to conduct experimental studies of processes in the basic electromechanical device (system) of forced control with starting and holding shunt windings for a monostable electromagnet of a vacuum contactor; – to investigate and improve the mathematical model of the dynamics of the forced electromagnetic system of vacuum contactors; – to investigate and improve the mathematical model of stationary heating of shunt windings of vacuum contactors; – to investigate and improve the mathematical model of forced heating of the shunt winding of the gas distribution valves of launch vehicles; – to improve the device for forced control with starting and holding shunt windings for a monostable electromagnet of a vacuum contactor and to carry out experimental investigations of processes in it. The object of research – electromagnetic, thermal stationary and transient processes in the circuits of shunt windings of monostable electromagnets and circuits of the device of forced control of these windings. The subject of research – a device for forced control of a monostable electromagnet of vacuum contactors; monostable solenoid of gas distribution valves of launch vehicles. Research methods. Computer mathematical modelling of transient electromagnetic mechanical and thermal processes in a monostable electromagnet of vacuum contactors and in shunt windings of gas distribution valves of launch vehicles taking into account the peculiarities of their operation is performed using the mathematical computer code Maple which allows to speed up the simulation process, perform cumbersome transformations and obtain computer simulation results in a convenient tabular and/or graphical form. Numerical solution of partial differential equations is performed using codes written by the applicant, the results of which have been validated experimentally. The following scientific results are obtained in the work. In the dissertation work the scientific and practical problem on improvement of system of forced control of a monostable electromagnet of a low voltage vacuum contactor using an electronic system in particular on increase of reliability (failure -free operation) and service life of the device, and also improvement of designs of the gas distribution valves of launch vehicles in the conditions of the forced modes due to the proved technical solutions and recommendations is solved. The analysis of existing designs of low voltage vacuum contactors is carried out. It was found that to reduce their size and power consumption, as well as to increase the speed and reliability of the contactors, forced control systems with starting and holding shunt windings are used. A number of shortcomings of such control systems have been identified. The most widespread (basic) system of forced control with starting and holding shunt windings for vacuum contactors at power supply from various sources of electric power is investigated and analyzed, recommendations on its improvement for elimination of shortcomings which arise during operation are given. The mathematical model of electromagnet dynamics as a part of the system of forced control of vacuum contactors is improved, which is a system of differential equations for transient processes in the mechanical system, as well as in the magnetic and electrical circuits of the forced electromagnetic system. The application of the model allowed to take into account the interaction of the electromagnet with the control device during the operation of the vacuum contactor, to determine the necessary system parameters, to establish the relationship and influence of drive and actuator parameters on the dynamic characteristics of the system, to determine the duration of operation of the electromagnet and the operation time interval of the timer. The nature of the dynamic processes in the forced electromagnetic system during the operation of the vacuum contactor is scientifically substantiated, which made it possible to increase the efficiency of its operation. A mathematical model of stationary heating of shunt windings of electromagnets in complex systems of forced control of vacuum contactors is improved. It takes into account the peculiarities of heat exchange between the windings, heat transfer from the windings to the magnetic circuit and the environment, taking into account the pulsations of currents and other features of electromagnets operation in forced electromagnetic systems. An algorithm for calculating the stationary heating of shunt windings of electromagnets operating in forced electromagnetic systems of vacuum contactors has been developed. The mathematical model and algorithm for calculating the forced heating of the shunt winding of the DC electromagnets of the gas distribution valves of launch vehicles are improved and significant temperature differences in the winding and the effect on the heating of objects surrounding the winding are analyzed. The improved semiconductor system of forced control with starting and holding shunt windings for vacuum contactors at power supply from various sources of electric power is investigated and analyzed, recommendations concerning its practical realization are given. The results of investigations are tested on models and prototypes that confirmed the recommendations and conclusions and are used in the development of vacuum contactors KVTn-250/1,14 of Research and Production Enterprise "Electrodynamics" with a semiconductor device for forced control of a monostable electromagnet. The materials of the dissertation are used in the educational process of NTU "KhPI" in the discipline "Electrical Apparatus" for students of specialty "141 – Electrical Power Engineering, Electrical Engineering and Electromechanics" (specializations "141.07 Electrical Apparatus" and "141.08 Electrical Household Appliances"), course projects, diploma theses and research work conducted at the Department of Electrical Apparatus. The dissertation has been performed at the Department of Electrical Devices under the agreement with "ABM Ampere" LLC, Kremenchuk on scientific and technical cooperation and scientific advising on the subject "Improvement of vacuum switching devices" (No. 33/227-2019) where the applicant was the executor of certain sections; initiative research work of the National Technical University "Kharkiv Polytechnic Institute" K3301 "Improvement of vacuum switching devices" (State registration No. 0119U002552) where the applicant was the executor of certain sections.
Король, Олена Геннадіївна. "Удосконалення системи форсованого керування електромагніта вакуумного контактора за допомогою електронної системи". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/49143.
Повний текст джерелаDissertation for the degree of Candidate of Technical Sciences in specialty 05.09.01 –Electric Machines and Apparatus. – National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2020. The dissertation is devoted to the improvement of the forced control system of the low voltage vacuum contactor monostable electromagnet with the help of the electronic system in particular regarding increase of the reliability (failure-free operation) and service life of the device, and also improvement of the designs of the gas distribution valves of launch vehicles in the conditions of the forced modes due to the proved technical solutions and recommendations. The electromechanical system of forced control with starting and holding shunt wind-ings for a monostable electromagnet of serial three-pole vacuum contactor KVTn-250/1,14 of Research and Production Enterprise "Electrodynamics" is considered and experimental investigations of processes in it are carried out. An improved semiconductor system of forced control is proposed. The mathematical model of the dynamics of the forced electro-magnetic system of vacuum contactors is improved and investigated. The mathematical model of stationary heating of shunt windings of vacuum contactors is improved and inves-tigated. The mathematical model of forced heating of the shunt winding of the gas distribu-tion valves of launch vehicles is improved and investigated. A prototype of a semiconductor device of forced control for a monostable electromagnet of a vacuum contactor is developed and experimental studies of processes in it are carried out.
Лавінський, Денис Володимирович, та Олег Костянтинович Морачковський. "Розрахунки електромагнітних та теплових полів у технологічних системах електромагнітної обробки". Thesis, Одесский национальный политехнический университет, 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41598.
Повний текст джерелаГапон, Дмитро Анатолійович. "Методи та засоби аналізу якості електропостачання та електромагнітної сумісності електротехнічних комплексів та систем". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/48421.
Повний текст джерелаThe dissertation on competition of a scientific degree of the doctor of technical sciences on a specialty 05.09.03 - "Electrotechnical complexes and systems". - National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2019. In the dissertation the important scientific and technical problem of increase of quality of power supply of electrotechnical objects, complexes and systems and maintenance of their electromagnetic compatibility by development of mathematical and hardware of systems of the account of the electric power taking into account energy efficiency of modes of power consumption and the revealed infringements of electromagnetic compatibility energy or its consumer. In the introduction the existing problem is defined and the urgency of the dissertation topic is substantiated, the connection of work with scientific programs, plans, themes is given, the purpose and tasks of scientific research are formulated, the object and subject of researches are considered, the list of research methods applied for achievement of the set purpose is given work. The scientific no velty and practical significance of the obtained results are stated, the data on publications and approbation of the results of the work are given, the personal contribution of the applicant is characterized, the information on the implementation of the results of the work is given. In the first section, based on the study and systematization of the results of analysis of materials from open sources, the main shortcomings of existing methods of assessing the quality of electricity supply and regulatory framework, which does not fully resolve conflict situations in violation of electromagnetic compatibility in terms of electricity supplier - consumer. Methods for determining the responsibility for the deterioration of electricity quality and its individual indicators are also considered. The second section analyzes the typical power supply scheme, which allowed to draw conclusions and obtain the main numerical characteristics of the power supply system of a three-phase electrical facility with a supply voltage of 10 kV. The computer model shows the mutual influence of several consumers on the quality indicators of the voltage at the point of connection and analyzes the influence of the parameters of the power supply system, these indicators. It is shown that the definition of the source of higher harmonics in the direction of the component power of the higher harmonic does not guarantee to allocate a consumer with a nonlinear load if the number of such consumers is greater than one. The compatibility of EN 50160 and IEEE 519 standards in terms of the norm of levels of harmonic components in the composition of current and voltage is also analyzed. The obtained results allow to speak about the presence of certain moments in which the higher harmonic components of the current generated by the consumer without violating the IEEE 519 standard can cause the presence of voltage harmonics exceeding the norms set by EN 50160. It is also concluded that the generation of higher harmonic components system resistance values. The third section proposes further development of the mathematical apparatus for determining power and loss coefficients as indicators of power consumption quality, in particular, the determination of integrated loss coefficients for three-phase three-wire and four-wire networks is substantiated. The theory of the "reference" consumer was further developed. It is shown that in a three-phase three-wire network the reference consumer, regardless of the voltage parameters, is a symmetrical triangle of constant active resistances. It is shown that in a three-phase four-wire system the reference consumer, regardless of voltage parameters, is a combination of a symmetric triangle of constant active resistances and a symmetric star, the resistance in the branches of which is as many times the resistance of the triangle as the active resistance of the neutral conductor. For the first time, a mathematical apparatus for selecting individual components from the total power and loss coefficients for such types of distortions as asymmetry, nonlinearity, reactivity and nonstationarity has been proposed. The concept of the reference reactive consumer from the conditions of maximum power or minimum losses at equality of ratios of power flows from and to the consumer is offered, that allows to realize calculation of coefficient of reactivity and power at any form of voltage in single-phase and three-phase networks. It is shown that in such a statement the reference reactive consumer tends to generate higher harmonics and does not have a convenient analytical or numerical solution for comparison with the current consumer. The concept of the average reactive consumer is proposed, in which all harmonics have an equal ratio of power flows to and from the consumer, which allows to compare the current consumption mode of the current consumer with such an average reactive one. A method for estimating the coefficients of loss and power from asymmetry for a three-phase consumer at arbitrary voltage is proposed. A method for estimating the ratio of the coefficients of losses from reactivity and nonlinearity of the consumer by dividing the corresponding harmonics of the Frieze current in the direction of the active component is proposed. A method for estimating the coefficients of losses and power from non-stationary consumption is proposed. In the fourth section the analysis of character of complex resistance of an electric network depending on parameters of its elements for typical cases of connection of consumers on voltage of 10 KV is carried out. The obtained dependence allows us to talk about the possible use of normalized values to estimate network bandwidth. The method of measuring the electrical parameters of a three-phase network based on the approximation of the input signal by the sum of harmonic components has been further developed. Features of the method are automatic adjustment of the frequency and duration of the observation interval in a given range, the use of a complete set of phase voltages (or linear) in determining the frequency taking into account their weight values, which reduces measurement errors in difficult conditions - in the presence of asymmetry, higher harmonics, aperiodic component or in the absence of voltage in a separate phase. In addition, the measurement method uses a constant quantization frequency of the input digital data, which simplifies the hardware of the device. A method of calculating the current values with a precise reference to the voltage period obtained by the previous method is proposed, which eliminates the frequency error in the measurement regardless of the location of the beginning and end of the observation interval relative to the input digital signal. The system of the account of electric energy with use of indicators of quality of electric energy and efficiency of electric consumption is offered. A feature of the system is the additional accounting of losses for the transmission of electricity by comparing the characteristics of electricity consumption of the current consumer with those for the reference consumer, ie the use of loss factors or power. This method of accounting allows you to correctly rate all deviations in the modes of load, such as reactivity, nonlinearity and nonstationarity. A system of penalties for deterioration of electricity quality is proposed, based on the calculation of "penalty" energy if the consumer violates the norms of electricity consumption and "non-tariffed" energy, if there are no violations by the consumer, but the quality of electricity does not meet the norms. The basics of billing on the basis of this electricity metering system are proposed. In the fifth section, the data confirming the theoretical provisions of sections 3 and 4 were experimentally obtained. In particular, estimates of the quality of electricity consumption were implemented by comparison with a set of reference consumers. The experiment showed the possibility of successful application of Frieze current generation and its subsequent analysis to assess the quality of electricity consumption. At the same time parallel use of its three-phase and single-phase implementations for an estimation of asymmetry, nonlinearity and reactivity accordingly is possible. The method of comparison with the reference average reactive consumer proposed in section 3 has not proved to be an effective tool of analysis and does not seem promising. At the same time, the separation of the harmonic components of the Frieze current in the direction of their active component allows you to effectively track the source of currents of higher harmonics. The above methods using the model of a fragment of the power system with different types of load confirmed the correctness of the developed methods for assessing the quality of electricity consumption. Tests using oscillograms obtained on real three-phase loads (traction substation) also confirmed the efficiency and effectiveness of the developed assessment methods. In models with exceeding the permissible modes, the use of the mathematical apparatus developed in Section 4 allowed to identify the source of distortion, even if several consumers act as sources of these distortions at the same time.
Панченко, Владислав Вадимович. "Покращення електромагнітної сумісності тягової підстанції постійного струму з контактною мережею". Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/20517.
Повний текст джерелаThesis for a candidate degree by specialty 05.22.09 – Electric Transport. – National Technical University "Kharkiv Polytechnical Institute", Kharkiv, 2016. The thesis is devoted to the improvement of electric energy quality indexes in direct current contact wire using a rectifier unit with a voltage booster converter with pulse-width modulation. It concerns the analysis of a rectifier unit electromagnetic compatibility with contact wire and the search of optimal technical facilities for its improvement. The author identifies the static and dynamic characteristics of a rectifier unit with a voltage booster converter of the chosen structure. The pulse model of a rectifier unit with double-side pulse-width modulation and pulsation factors values were obtained and defined for the first time. To solve the problem of the negative influence of rectified voltage upper harmonics on adjacent electrical units the proposed rectifier unit was included to the composition of automatic regulation closed-loop system. The author for the first time performs the synthesis of the transfer function of automatic regulation system voltage adjuster of a rectifier unit with a voltage booster converter with double-side pulse-width modulation. The obtained theoretical statements were confirmed experimentally with the help of simulation models. All the proposed approaches and solutions serve the main purpose of the work and contribute to the improvement of electromagnetic compatibility of power supply units and electric transport.
Горенко, Дар’я Сергіївна. "Оцінювання обмінних процесів у локальних системах електропостачання з джерелами розосередженої генерації". Thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/32609.
Повний текст джерелаIn the dissertation the complex analysis of the peculiarities of functioning of local power supply systems (LPSS) is carried out taking into account the modern requirements of the Smart Grid concept and the comparative analysis of methods of estimation of exchange processes in LPSS with dispersed energy sources is performed. The need to extend the known LPSS system to adequately assess the EMC levels in the LPSS with the requirements of the Smart Grid concept and to estimate the energy flow rates using known indicators is justified. The analysis of exchange processes of LPSS under the influence of different types of impulse disturbances and sources of non-sinusoidal voltage and current caused by the peculiarities of modes of operation of both individual elements and the system as a whole for single and three-phase cross sections of LPSS is carried out. New relationships were obtained to evaluate the effect of non-sinusoidality and to take into account the ripple coefficients on the nature of the exchange processes. The analysis of the exchange processes in LPSS has been carried out taking into account the real characteristics of the elements with electromagnetic bonds (transformers, reactors, transmission lines, etc.) and new relationships have been obtained, which link the exchange power and the coefficients of magnetic coupling for one and three-phase LPSS operating in both sinusoidal and non-sinusoidal modes, as well as in symmetric and asymmetric modes. Regulatory and methodological support of the expanded energy audit with the use of exchange power was developed and tested. Regulatory and methodological support was used: for conducting an expanded energy audit at the enterprise of СE «Vasylkiv Leather Company» (Vasylkiv, Kyiv region); analysis of parallel operation of standby power supply systems both separately and in combination with the network used for powering server equipment of PLC «Prostonet»; was the basis for the course of lectures on discipline "Electrical Engineering Complexes", which will be taught in 2019 at Vasylkivsky College of NAU. A specialized software module and regulatory and methodological support for the extended energy audit using exchange power have been developed and tested. The proposed regulatory and methodological support makes it possible to: determine the exchange power and the proportion of mutual influence in an arbitrary intersection of LPSS, taking into account the peculiarities of their configuration, modes of operation of individual elements and LPSS as a whole; to obtain information on exchange processes in the LPSS with different levels of information support; to adequately take into account the peculiarities of the flow of modes in the LPSS, in particular, the bidirectionality of electricity flows and to determine their real distribution in the elements of LPSS.
Пальчиков, Олег Олегович. "Оптимізація технічного рівня індукційних електромеханічних та статичних перетворювачів з обертовим магнітним полем". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/26765.
Повний текст джерелаThe thesis for granting the Degree of Candidate of Technical sciences in the specialty 05.09.01 – electrical machines and apparatus. – National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2017. The thesis is devoted to questions of development of mathematical models of parameters of steady state and comparison of electromagnetic systems’ variants of squirrel-cage induction motors and transformers with a rotating magnetic field by criteria of weight, cost, active power losses, reactive power and generalized criteria, which has been obtained by the ideal point method. The method of objective functions with relative technical level indications and relative controlled variables has been used for solution of assigned tasks. In mathematical models of parameters of steady state of axial electromagnetic systems of mentioned converters the uneven radial distribution of magnetic induction in the magnetic circuit elements has been taken into account. For induction motors with internal and external rotors, and an axial magnetic flux, including sectioning of magnetic core, and transformers with a rotating magnetic field the optimum geometrical ratios have been determined. It has been shown, that an application of non-traditional variants of electromagnetic systems of induction converters could significantly improve indications of electrotechnical systems, for example the replacement of induction motors with an internal rotor on induction motors with an external rotor and an axial magnetic flux has been recommended, when the number of pole pairs was 1–3 and 3–4 respectively. Also ways to increase the starting torque of induction motors have been considered, and the method of determining efficiency and power factors of induction converters, depending on the controlled variables, has been developed.
Яворський, А. В. "Розробка методу та системи для безконтактного контролю стану ізоляції промислових нафтогазопроводів". Thesis, Івано-Франківський національний технічний університет нафти і газу, 2005. http://elar.nung.edu.ua/handle/123456789/4093.
Повний текст джерелаДиссертация посвящена вопросу бесконтактного контроля состояния изоляционного покрытия промышленных нефтегазопроводов. Предложен новый метод бесконтактного контроля изоляционного покрытия подземных промышленных нефтегазопроводов. Метод позволяет контролировать изоляцию как одиночных так и параллельных электрически соединенных подземных нефтегазопроводов при наличии электромагнитных помех.
Dissertation is devoted to the question of control of being of isolating non-contact coating of industrial oil and gas pipeline. A new method of non-contact control of isolating coating of underground industrial oil and gas pipeline is offered. A method allows to control an isolation as single so parallel gaivanically linked oil and gas pipeline at presence of electromagnetic noises. Created mathematical model of distributing of horizontal constituent of tension of the magnetic field of a few parallel gaivanically linked oil and gas pipeline. Got dependences for description of the transitional becoming current in the walls of underground oil and gas pipeline. The informative-measuring system (IMS) which realizes the offered method of control of isolating coating is developed. Conducted model tests of developed IMS. The method of test and method of metrologichnoi attestation IMS is developed.
Книги з теми "Електромагнітна система"
Коновал, Олександр Андрійович. Відносність електричного і магнітного полів. Видавничий дім, 2008. http://dx.doi.org/10.31812/123456789/3602.
Повний текст джерела