Electromechanical and energy saving systems最新文献

{"title":"ON TACTICS OF DEVELOPING ARCHITECTURE OF THE GENERALIZED ALGORITHM OF ENERGY-ORIENTED POWER CONSUMPTION CONTROL AT IRON ORE UNDERGROUND MINING COMPANIES","authors":"I. Sinchuk, A. Kupin, V. Baranovskyi","doi":"10.30929/2072-2052.2021.1.53.51-63","DOIUrl":"https://doi.org/10.30929/2072-2052.2021.1.53.51-63","url":null,"abstract":"Purpose. The article substantiates and confirms the thesis about the need for energy-oriented power consumption control levels in power complexes: the system of power supply at iron ore underground mining enterprises on the basis of experiment data analysis. Methodology. It is estimated that along with the current positive trend suitable for developing architecture of power consumption control levels when a limited number of energy-intensive enterprises consume about 80 % of the total power produced, their functioning modes in day hours vary. Analysis of varied realtime modes of power consumption in hours indicates absence of enterprises’ control over this process. Results. The suggested methods enable forecasting efficiency of power consumption control in hours in any variant of time-of-day tariff integration. In non-standard and changeable conditions of technological parameters in mining production, on the basis of the results of stochastic optimization analysis, it is proven that even when applying a small number of iterations N = 10, it is possible to improve the initial solution by over 60 % (the initial value of the objective function is I* = 27.7 and the final value on the last iteration is I* = 10.7). There are determined required vectors to specify a connection of the time-of-day tariff of ore mining (Р*) and the corresponding power consumption (Е*) which corresponds to the suboptimal value of the objective function (I*). The obtained results can be applied to developing recommendations for a more efficient planning of an enterprise’s performance. Practical value. The suggested algorithm implemented in power consumption control systems enables receiving a final result with any quality required for the level. If the quality of the obtained results needs improving, the number of iterations is to be increased by two or three orders of magnitude.","PeriodicalId":122279,"journal":{"name":"Electromechanical and energy saving systems","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126381683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"STUDY OF THE APERIODIC REGIME DURING THE TRANSIENT PROCESS IN AN OSCILLATING CIRCUIT IN ORDER TO CONVERT THE ENERGY OF AN ELECTRIC CURRENT INTO THE HEAT OF A JOULE","authors":"P. Bratyuk","doi":"10.30929/2072-2052.2021.1.53.15-26","DOIUrl":"https://doi.org/10.30929/2072-2052.2021.1.53.15-26","url":null,"abstract":"Purpose. Research initiated by revealing the paradox of disturbed energy balance based on the position of the virial theorem and studying examples of the Van de Graaf generator, a capacitor containing a ferroelectric, and a heat pump capable of providing an energy conversion factor greater than 100%, as well as an idealized theoretical known as the Maxwell demon, showed the possibility of increasing the efficiency of converting current energy into Joule heat. Methodology. The results are verified by comparing the relative efficiency of the conversion of current energy into heat in the oscillatory, critical and aperiodic modes of the transient process in a series oscillating circuit. Mathematical modeling in a wide range of parameter changes has shown the advantage of using the aperiodic transient mode of a series oscillating circuit to convert current energy into heat, compared to the power supply of an electric heating system, which is based on the established method. Experimental tests of the experimental sample fully confirm the qualitative results of mathematical modeling. Results. An achievable limit level of conversion efficiency in the active resistance of energy accumulated by inductance and capacitance according to the virial theorem is established. Originality. For the first time, the application of the aperiodic transient mode in a series oscillatory circuit is proposed in order to convert the energy of current to Joule heat. Practical value. As a practical result, a method of converting current energy into pulse energy has been developed, which implements the algorithm of simultaneous energy accumulation by inductance and capacitance, and its simultaneous conversion in a series oscillating circuit, for which a patent has been obtained. Possibilities of application of the developed method for the purpose of induction heating of metals by Foucault currents as replacement of a method of shock excitation of fluctuations are studied. To this end, the conductivity of metals, which causes the flow of Foucault currents, should be considered as the introduction of equivalent active resistance in the oscillating circuit. The introduction of the method will not require changes in the process equipment, except for the power supply scheme, and should eliminate the fundamental disadvantage of the method of shock excitation of powerful oscillations, which is low efficiency.","PeriodicalId":122279,"journal":{"name":"Electromechanical and energy saving systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128753861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DETERMINATION OF ENERGY EFFICIENT LEVEL OF THE SPEED OF MIXING BODY OF ELECTROMECHANICAL SYSTEM","authors":"N. Zablodskiy, М. Spodoba","doi":"10.30929/2072-2052.2020.4.52.17-26","DOIUrl":"https://doi.org/10.30929/2072-2052.2020.4.52.17-26","url":null,"abstract":"Purpose. Today, biomass fermentation in biogas plants is one of the most advanced, environmentally and economically viable solutions for energy production from waste. However, the process of anaerobic digestion of waste is long, so the main process of intensification is mixing. Analysis of well-known studies of domestic and foreign scientists indicates the urgency of reducing energy consumption for the mixing process. The aim of the study is to determine the energy-efficient speed of a paddle stirrer with blades set at an angle of 450 for small biogas reactors. Methodology. At the decision of the set tasks the general methods of physics, three-dimensional modeling, processing and visualization of the received results in the SolidWorks Flow Simulation and Wolfram Mathematica programs are applied. Results. Using 3D modeling, the influence of the stirrer speed on the picture of the distribution of the velocity vectors of the substrate flows in the biogas reactor was studied. Graphs of power consumption at the beginning of mixing for different stirrer speeds were obtained and analyzed, and the levels of energy consumed for mixing biomass during the start-up period and the whole mixing period were compared. A method for determining the energy efficient rotation speed of the stirring mechanism of the electromechanical system of biogas reactors is proposed. Practical value. The results can be used in the construction and modernization of biogas plants to reduce energy consumption of the substrate mixing process. Conclusion. Based on the research, it was concluded that for a paddle two-tier mixer with blades set at an angle of 450 energy-efficient speed, is 40 rpm. At this speed, careful and intensive mixing of the biomass is observed throughout the volume of the tank. The average velocity of flow vectors in the biomass volume is 0,273 m/s. The energy consumed per cycle of biomass mixing is 2471,3 J, and the percentage of energy consumed during the start-up period from the energy consumed during the entire mixing period is 0,62 %. References 19, figures 5.","PeriodicalId":122279,"journal":{"name":"Electromechanical and energy saving systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129094020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PARAMETERS OF GUARANTEED SELF–EXCITATION OF AN INDUCTION GENERATOR FOR AUTONOMOUS ELECTRIC POWER SOURCES","authors":"V. Chenchevoi","doi":"10.30929/2072-2052.2020.4.52.40-49","DOIUrl":"https://doi.org/10.30929/2072-2052.2020.4.52.40-49","url":null,"abstract":"Purpose. Development of the IG model for estimation of influence of variations of parameters of the generator on quality of process of self-excitation at definition of the basic and boundary operating modes and system of initial excitation at invariable parameters of the generator. Result. The article simulates the self-excitation process of an autonomous asynchronous generator by the method of regression equations, which adequately describe the dependence of the self-excitation time and the value of the output voltage. The following statistically significant factors have been determined, such as the excitation capacity, the rotor speed, remanent magnetization and residual voltage on the capacitors and their influence on the qualitative and quantitative characteristics of the excitation process of the induction generator. The conditions for self-excitation of an asynchronous generator with capacitor excitation as part of an autonomous power source are determined. Recommendations are formulated for the design of an autonomous power source based on an asynchronous machine in terms of the implementation of self-excitation conditions and optimal operating modes. A simulation model of an autonomous asynchronous generator and solar battery for the analysis of transient, static and dynamic operating modes has been developed. Practical value. The carried out theoretical studies of the capacitive self–excitation of IM machines have created a good basis for solving issues related to the practical use of autonomous sources based on an asynchronous generator. Figures 8, tables 3, references 20.","PeriodicalId":122279,"journal":{"name":"Electromechanical and energy saving systems","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132529341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DESIGN AND IMPLEMENTATION OF AUTOMATED SYSTEM FOR MEASURING CAR BATTERY CAPACITY","authors":"M. Suchanovský, J. Molnar, O. Slavko","doi":"10.30929/2072-2052.2020.4.52.51-59","DOIUrl":"https://doi.org/10.30929/2072-2052.2020.4.52.51-59","url":null,"abstract":"Purpose. The purpose of this article is to design hardware for an automated system for measuring the parameters of the car battery and the subsequent approximation of its capacity and other parameters necessary to determine its condition. Originality. The paper deals with the research on the car batteries and measuring instruments to detect their parameters in order to determine a suitable software solution for automated measuring system to measure the car battery capacity. Methodology. The paper proposes one of the possibilities for development an automated system for measuring car battery capacity basing on microcontrollers system using prototyping, designing, simulation and testing techniques. Authors described the whole development process starting from computer design of the proposed device, chose the elements for hardware unit, prototyping using development boards and tools, developing program algorithms and implementing related applied software with the final results verification. Result. In this work authors proposed hardware solution of an automated system for measuring the capacity of a car battery. The whole design concept consisted of the selection of the main hardware components, which were then implemented into a complex functional unit. Following it was designed a software solution. This proposal was initiated by a program for measuring the parameters of the battery, then the calculation of the internal resistance from the measured parameters and the approximation of capacity on the basis of the detected life-span was added to this programme. A Web page was then created. Practical value. Proposed experimental sample could be practically used for automatic measurement of car battery capacity and also could be served as an experimental sample of remote measuring device. References 14, figures 14.","PeriodicalId":122279,"journal":{"name":"Electromechanical and energy saving systems","volume":"22 32","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113962852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IMPROVING THE EFFICIENCY OF SYSTEMS OF LOW-POTENTIAL COMPLEX POWER STATIONS BY OPTIMAL CONTROL OF CONSUMPTION CIRCULATION WATER","authors":"G. Kanyuk, А. Mezerya, A. Chebotarev, A. Bliznichenko","doi":"10.30929/2072-2052.2020.4.52.34-39","DOIUrl":"https://doi.org/10.30929/2072-2052.2020.4.52.34-39","url":null,"abstract":"Purpose. In article is organized analysis of the influence state of working circulation pump on economy of the systems low-potential complex and on the general economy of the work heat and atomic power stations. The organized analysis of the field-performance data of the systems low-potential complex Zaporozhskoy NPS in cut of the year, which has shown that as criterion to economy of the work low-potential complex can be accepted importance of the increase the production to powers of the compartment of steam turbine to power stations. Methodology. On the grounds of mathematical modeling main dependencies, which characterize efficiency of the functioning the systems low-potential complex. Results. The certain reserve energysave at increasing of efficiency of the functioning the systems low-potential complex. So total value of the losses to disposable energy in low-potential complex for energyblock HPS power 300–1200 MWt forms 7–8 % for systems of the water-supply with water-chiller and evaporation and 8–10 % for systems with radiator are determined. The organized analysis of the experimental features energyblock 300 MWt Zmievskoy HPS and is determined dependency of the pressure pair is in capacitor from the temperature circulation water and consumption pair under fixed consumption circulation water. Analytical dependencies, which allow coming from the known importance of the consumption pair, the temperature circulation water and desired pressure in capacitor to define the necessary consumption cooling water, under which will are provided given parameters are brought. Practical value. Comparative feature to energy efficiency of the functioning the system turbine-capacitor coming from features gain powers of the turbine for concrete consumption pair and dependencies of the consumption circulation water from consumed powers circulation pump will built. The broughted model of management system low-potential complex on criterion of the optimum of the consumption circulation water, under which total losses to energy will be minimum. On the grounds of afore-cited theoretical position","PeriodicalId":122279,"journal":{"name":"Electromechanical and energy saving systems","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115368786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EXPERIMENTAL STUDIES ON DETERMINING THE PARAMETERS OF ELECTRIC MOTORS OF THE QUARRY ELECTRIC LOCOMOTIVE TRACTION ELECTRIC DRIVE","authors":"A. Artemenko, O. Chornyi","doi":"10.30929/2072-2052.2020.4.52.27-32","DOIUrl":"https://doi.org/10.30929/2072-2052.2020.4.52.27-32","url":null,"abstract":"Purpose. The purpose of the work is to conduct experimental studies to determine the parameters of DC motors of sequential excitation in dynamic modes of operation for use in setting up the control system of the electric drive. The paper presents the results of experimental studies to determine the parameters of the traction electric drive of direct current quarry electric locomotive. The research was conducted on the basis of Kremenchuk Mykhailo Ostrohradskyi National University with the use of a laboratory research stand with electromechanical equipment that simulates the operation of a traction drive, namely slippage of traction wheels when changing clutch conditions and differences in electrical parameters of traction motors. Methodology. The parameters were determined on the basis of a set of methods based on the measured instantaneous values of the state variables of the electric drive. The efficiency of application of the method of state space and the method which uses instantaneous values of current and voltage of the motor in the quasi-constant mode at power supply from the valve energy converter is proved. Results. The results obtained in the course of research indicate the possibility of calculating the parameters with an accuracy of 10 %. The verification of the obtained results is checked by subtracting the coefficient of determination and the sum of the squares of the deviations for the experimental data calculated on the basis of certain parameters. Originality. The accuracy of parameter determination is ensured by the use of instantaneous values of current and voltage at adjacent time intervals, and the voltage at the armature is formed by the control system and changes over time, ensuring the start of the motor with starting current limitation. Practical value. The developed computerized laboratory stand allows to measure instantaneous values of state variables and to carry out calculations of electric parameters of traction engines, and also to investigate static, power and dynamic operating modes of electromechanical transmissions of vehicles, both in regular operating modes, and to simulate various emergency operating modes, in particular. Figures 5, tables 2, references 7.","PeriodicalId":122279,"journal":{"name":"Electromechanical and energy saving systems","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122031395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FEATURES OF POWER DETERMINATION OF AUXILIARY-EMERGENCY DRIVE MOTION OF A SHIP WITH A COMBINED DIESEL-ELECTRIC POWER PLANT","authors":"A. Rak, V. Busher, O. Glazeva","doi":"10.30929/2072-2052.2020.4.52.8-16","DOIUrl":"https://doi.org/10.30929/2072-2052.2020.4.52.8-16","url":null,"abstract":"Purpose. The paper compares the traditional method of calculating the parameters of electric motion of ships in auxiliary emergency modes at low speeds of the vessel with another, simplified because it does not require the use of a large number of diagrams to determine the resistance of the vessel. But according to a simplified method for this example – a container ship with a capacity of 16,000 containers with the main engine capacity of 61776 kW, a synchronous machine with a capacity of up to 6 MW in engine mode, and three diesel generators with an electric capacity of 3187 kW – 39 % more power is obtained. Own experience of operation of the vessel in modes with electric movement – loading of diesel generators in this mode on the vessel about 70 % that is received by calculations. Thus, when upgrading the propulsion system or designing new vessels, it is advisable to compare the results of two calculations of the power of diesel generators at the limit of the minimum stable speed of the main engine and choose the larger of the results. Methodology. Comparison of specific and absolute fuel consumption, made on the basis of known approximation polynomials for low- and high-speed types of diesel of the company at auxiliary emergency movement shows that at the movement from high-speed diesel generators MAK8M32S fuel consumption decreases by 24 %, then at the maintenance of the main engine 12 RTflex-96C from WÄRTSILÄ-SULZER. Results. Therefore, the use of electric motion allows you to save engine power of the main engine, reduce fuel consumption. This ratio is observed on most maritime transport vessels. And given that diesel generators operate at almost optimal load, and the main engine – at idle, electric motion provides a significant reduction in harmful emissions into the atmosphere. The latter is also true for a ship where the synchronous engine is located behind the main engine, although fuel consumption, in this case, increases by 32 %. Figures 9, tables 6, references 15.","PeriodicalId":122279,"journal":{"name":"Electromechanical and energy saving systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121265985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"APPLICATION OF THE GENERALIZED ELECTROMECHANICAL CONVERTER THEORY TO ANALYSIS OF THE STATIC CHARACTERISTICS OF AN INDUCTION MOTOR","authors":"V. Tytiuk, M. Baranovska, Zhanna Rozhnenko, O. Chornyi, Е. Burdilna, B. Kobylianskyi","doi":"10.30929/2072-2052.2020.2.50.16-24","DOIUrl":"https://doi.org/10.30929/2072-2052.2020.2.50.16-24","url":null,"abstract":"Purpose. The work is devoted to the development of a closed-loop control system of hydraulic transport system with pressure stabilization and its research on a mathematical model. Originality. The expediency of application of a closed-loop control system of electric water transport system with pressure stabilization as the most promising way of resource saving in the operation of pumping complexes is substantiated. The realization of the closed-loop pressure stabilization system using a discrete program regulator is proposed. The studies of parametric sensitivity of the closedloop pressure stabilization system have confirmed the high robustness of the proposed solution. Methodology. General methods of physics, hydraulics, mathematical analysis and computational mathematics were used to solve the tasks. Numerical solution of mathematical model equations and visualization of obtained results were performed in MATLAB®/Simulink environment. Results. The expediency of using closed-loop control systems of pumping units with pressure stabilization as the most promising way of resource saving in the operation of pumping complexes is substantiated. The impossibility of implementing the pressure stabilization system based on the classical PID controller is shown, which is caused by the influence of wave processes in the pipeline system with distributed parameters. The closed-loop pressure stabilization system with the use of a discrete program regulator is realized, its stability and robustness in a wide range of changes in the regulator parameters is shown. Practical value. The possibility of implementing a closed-loop pressure stabilization system of electric hydrotransport system has been substantiated; a method of calculating the discrete program pressure regulator based on the regression analysis of the results of mathematical modeling has been proposed. Figures 12, tables 2, references 9.","PeriodicalId":122279,"journal":{"name":"Electromechanical and energy saving systems","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115036897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DEVICE FOR PRODUCTION OF PLASTIC FILAMENT FOR 3D PRINTER","authors":"J. Molnár, P. Hrabovský","doi":"10.30929/2072-2052.2019.3.47.79-86","DOIUrl":"https://doi.org/10.30929/2072-2052.2019.3.47.79-86","url":null,"abstract":"","PeriodicalId":122279,"journal":{"name":"Electromechanical and energy saving systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128358063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}