MODELING CONTROLLED ASYNCHRONOUS ELECTRIC DRIVES WITH MATCHING REDUCERS AND TRANSFORMERS

Purpose. Working out of mathematical models of the speed-controlled induction electric drives ensuring joint consideration of transformers, motors and loadings, and also matching reducers and transformers, both in static, and in dynamic regimes for the analysis of their operating characteristics. Methodology. At mathematical modelling are considered functional, mass, dimensional and cost indexes of reducers and transformers that allows observing engineering and economic aspects of speed-controlled induction electric drives. The mathematical models used for examination of the transitive electromagnetic and electromechanical processes, are grounded on systems of nonlinear differential equations with nonlinear coefficients (parameters of equivalent circuits of motors), varying in each operating point, including owing to appearances of saturation of magnetic system and current displacement in a winding of a rotor of an induction motor. For the purpose of raise of level of adequacy of models a magnetic circuit iron, additional and mechanical losses are considered. Results. Modelling of the several speed-controlled induction electric drives, different by components, but working on a loading equal on character, magnitude and a demanded control range is executed. At use of characteristic families including mechanical, at various parameters of regulating on which performances of the load mechanism are superimposed, the adjusting characteristics representing dependences of a modification of electrical, energy and thermal magnitudes from an angular speed of motors are gained. Originality. The offered complex models of speed-controlled induction electric drives with matching reducers and transformers, give the chance to realize well-founded sampling of components of drives. They also can be used as the design models by working out of speed-controlled induction motors. Practical value. Operating characteristics of various speed-controlled induction electric drives are observed and depending on the chosen measure including measure of cost of losses of active energy, sampling of the best alternative of the drive is realized

МОДЕЛИРОВАНИЕ РЕГУЛИРУЕМЫХ АСИНХРОННЫХ ЭЛЕКТРОПРИВОДОВ С СОГЛАСУЮЩИМИ РЕДУКТОРАМИ И ТРАНСФОРМАТОРАМИ

Purpose. Working out of mathematical models of the speed-controlled induction electric drives ensuring joint consideration of transformers, motors and loadings, and also matching reducers and transformers, both in static, and in dynamic regimes for the analysis of their operating characteristics. Methodology. At mathematical modelling are considered functional, mass, dimensional and cost indexes of reducers and transformers that allows observing engineering and economic aspects of speed-controlled induction electric drives. The mathematical models used for examination of the transitive electromagnetic and electromechanical processes, are grounded on systems of nonlinear differential equations with nonlinear coefficients (parameters of equivalent circuits of motors), varying in each operating point, including owing to appearances of saturation of magnetic system and current displacement in a winding of a rotor of an induction motor. For the purpose of raise of level of adequacy of models a magnetic circuit iron, additional and mechanical losses are considered. Results. Modelling of the several speed-controlled induction electric drives, different by components, but working on a loading equal on character, magnitude and a demanded control range is executed. At use of characteristic families including mechanical, at various parameters of regulating on which performances of the load mechanism are superimposed, the adjusting characteristics representing dependences of a modification of electrical, energy and thermal magnitudes from an angular speed of motors are gained. Originality. The offered complex models of speed-controlled induction electric drives with matching reducers and transformers, give the chance to realize well-founded sampling of components of drives. They also can be used as the design models by working out of speed-controlled induction motors. Practical value. Operating characteristics of various speed-controlled induction electric drives are observed and depending on the chosen measure including measure of cost of losses of active energy, sampling of the best alternative of the drive is realized.Исследована работа разных асинхронных двигателей в составе регулируемых электроприводов, которые выполняют одну и ту же техническую задачу, с учетом включения таких элементов, как согласующие трансформатор и редуктор. Проведено сопоставление характеристик двигателей в статических и динамических режимах. Определены энергетические, массогабаритностоимостные показатели электроприводов. Обоснована возможность выбора лучшего варианта привода, как по вышеуказанным показателям, так и по стоимости потерь активной энергии.Досліджено роботу різних асинхронних двигунів у складі регульованих електроприводів, що виконують одну і ту ж технічну задачу, з урахуванням включення таких елементів, як узгоджувальні трансформатор і редуктор. Зроблено зіставлення характеристик двигунів в статичних та динамічних режимах. Визначено енергетичні, масогабаритновартісні показники електроприводів. Обґрунтовано можливість вибору кращого варіанту приводу, як за вищевказаними показниками, так і за вартістю втрат активної енергії

Lev Evgenevich Shaposhnikov in the context of russian philosophy

Introduction: the present paper aims to portray Lev Shaposhnikov, a Russian scholar, professor, doctor of philosophy as an advocator of the historico-philosophical approach. For this purpose it is essential to provide a holistic analysis of the personality of L. Shaposhnikov as well as his philosophical views in the synchronic and diachronic dimensions.   Materials and Methods: Lev Shaposhnikov’s research papers devoted to the problems of the Russian religious philosophy as well as works of prominent Russian scholars of the XIX-XX centuries served as materials for the given study. The research methods employed included philosophical analysis, interpretation, comparison and generalization. Results: as a result of the conducted research L. Shaposhnikov’ philosophical standpoint has been analysed, including description and evaluation of his academic, scholarly, and managerial activity in the philosophical realm. Overall, it is clear that Prof. Shaposhnikov’s research is centred around a range of topics, such as: history of the religious philosophy and Orthodox theology; development and specific features of spiritual education in Russia. At present this thematic field is being widened due to investigations of philosophical and pedagogical views of Russian scholars of the ХIХ-ХХ centuries. Lev Shaposhnikov's achievements concern not only profound academic enquiry, but also creation of a school of thought on the history of philosophy, involvement in educational activity, organization of large academic events (for example, Rozhdestvenskiye chteniya – an international conference held in Nizhny Novgorod for 30 years), participation in collective research of scholars from Russian leading universities (such as the Moscow State University and others).  Discussion and Conclusion: within the framework of the present paper a scholarly discussion of famous philosophers from Russia (Moscow, St. Petersburg, Nizhny Novgorod) and Belorussia addressed to Prof. Shaposhnikov is presented. It helps comprehend his key ideas in their relation to the modern scientific context and the works of known Russian philosophers of the XIX-XX centuries.Analysis of the historiosophy of Russian philosophers (such as V. Rosanov, N. Berdyaev, and others) is one of the foci in L. Shaposhnikov’s works. The author often uses an innovative approach to interpret the history of philosophy, yet his logic and vision provide reliability of the results obtained. Moreover, investigation of the Russian religious philosophy, in-depth analysis of the ideas of conservatism, research into the history of spiritual education in Russia represent important directions in L. Shaposhnikov’s scholarly work . An obvious asset of L. Shaposhnikov’s works is systematization and classification of the philosophical issues as well as enriching the terminology base of philosophy. Thus it could be posited that research studies by L. Shaposhnikov are sure to have a valuable methodological potential.In general, the authors of the given paper managed to portray Lev Shaposhnikov as a prominent modern scholar and reveal the role of his views in the history of the Russian philosophy