Technical Electrodynamics最新文献

{"title":"RESEARCH OF CHARACTERISTICS OF HIGH VOLTAGE TRANSFORMERLESS RESONANT CHARGER OF CAPACITARY STORAGE DEVICE","authors":"D.V. Vinnychnko, N. Nazarova, I. Vinnychenko","doi":"10.15407/techned2023.02.021","DOIUrl":"https://doi.org/10.15407/techned2023.02.021","url":null,"abstract":"Electromagnetic processes in a high-voltage transformerless resonant device for charging capacitor are analyzed. The dependences of the output voltage and charging current on the relative load and the quality factor of the resonant circuit are obtained. The nature of the change in output voltage depending on the quality factor and relative load ratio is analyzed. Simulation of the researched converter operation is carried out. References 11, figures 6.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48515134","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":"ROBUST CONTROL OF LOW-COST DIRECT DRIVES BASED ON INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTORS","authors":"S. Peresada, D. Rodkin, Y. Nikonenko, S. Kovbasa, V.V. Polischuk","doi":"10.15407/techned2023.02.037","DOIUrl":"https://doi.org/10.15407/techned2023.02.037","url":null,"abstract":"Torque ripple compensation problem is considered for electrical drives, based on low-cost direct drive interior perma-nent magnet synchronous motors. Robustness properties of the speed and position control systems have been studied using time scale separation properties of the current, speed and position control loops. It is shown that system closed-loop dynamics according to new controller design has cascaded properties with speed and position control loops con-nected in series and therefore has potential of high frequency torque ripple compensation by increasing controllers gains. Experimental results are presented for two motors with similar rated data but significantly different level of the torque ripple. It is shown that despite of significand difference in parasitic torque amplitude, the similar position con-trol performance can be achieved. It makes proposed control algorithms suitable for both high dynamic performance and low-cost direct drive applications with medium performance requirements. References 13, figures 7.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42434508","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":"REDUCTION OF INFLUENCE OF NEAR-ELECTRODE CHARGE TRANSFER RESISTANCE IN BIOSENSOR CONDUCTOMETRIC MEASURING TRANSDUCERS","authors":"P. Borshchov, V. Melnyk","doi":"10.15407/techned2023.02.074","DOIUrl":"https://doi.org/10.15407/techned2023.02.074","url":null,"abstract":"The article proposes the further development of a method of reducing the error of measuring local changes in the electrical conductivity of electrolyte solutions caused by a change in the background electrical conductivity of the measuring medium. Such an error occurs in differential conductometric biosensors with working and reference transducers, if their electrical parameters differ significantly. In contrast to the previously known, the described method takes into account the influence of near-electrode charge transfer resistances, which becomes especially noticeable when there is a significant difference in the values of these parameters of the converters. The goal is to ensure deep suppression of the influence of background changes in electrical conductivity of solutions under significant differences in the reactive and active component impedances of pairs of sensor transducers, including near-electrode charge transfer resistances. Mathematical expressions characterizing the process of bringing the bridge measuring circuit to a specific state of quasi-balance, in which the influence of changes in the background electrical conductivity of electrolyte solutions is minimal, are considered. Formulas for calculating the voltage parameters on the reference converter have been obtained, which make it possible to establish the indicated mode of the measuring circuit. A technique for determining the values of charge transfer resistances using the results of additional measurements of the impedance parameters of the converters at a frequency higher than the operating frequency is proposed. The results of research on suppressing the effect of changes in the background electrical conductivity of the solution in the differential conductometric channel using a computer model are presented, which showed the possibility of significantly reducing the effect of changes in the background electrical conductivity of the solution compared to the known method. References 9, figures 2, table 1.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48132942","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 ALGORITHM FOR CALCULATING THE TEMPERATURE OF THE QUASILINEAR RESISTANCE SENSOR PT100","authors":"I.V. Herasymenko, I. Zaitsev, V.I. Latenko, R.D. Myronov, I.A. Ornatsky, S. Fil","doi":"10.15407/techned2023.02.083","DOIUrl":"https://doi.org/10.15407/techned2023.02.083","url":null,"abstract":"The paper investigates iterative algorithms for solving the equation according to the Kalendar-Van Dusyn formula, which describes the dependence of the electrical resistance of the Pt100 family sensor on temperature. This family of platinum sensors is considered quasi-linear, but for high-precision measurements the nonlinearity of the sensor cannot be neglected, so it is necessary to solve the nonlinear equation of Pt100. At minus temperatures, the equation according to the Kalendar-Van Dusyn formula reaches the fourth power and has no solution with respect to temperature in an analytical form. The analysis of the previously published iterative algorithm for the approximate solution of the equation reveals a desadvantage of this algorithm. The residual error of the solution is not a monotonic function of the argument, because it contains extrema, moreover, the sign of the error changes to the opposite after each extremum. The purpose of this study was to obtain an algorithm that provides the residual error in the form of a monotonic deterministic function of the argument with the minimization of the maximum error value. The possibility to modify the iterative algorithm-prototype in an elementary way by fixing the number of iterations is shown. The residual error of solving the equation according to the modified algorithm has the form of a monotonic deterministic function of the argument. It is assumed that any iterative calculation algorithm can be improved in this way. At the same time, the minimization of the error values of the modified algorithm is achieved by setting the maximum number of iterations compared to the prototype algorithm. To overcome this desadvantage of the modified algorithm, a new algorithm is proposed, in which, in addition to a fixed number of iterations, the property of the smallness of the components of higher degrees is used. The high efficiency of the new algorithm is shown, which reduces the residual error of the solution to a negligible value in just four iterations. It is claimed that the high efficiency of the new algorithm makes further research in the direction of its improvement unnecessary. The article presents a scheme of the new algorithm and a corresponding program on the VBA platform for Excel, which is suitable for direct use in the software of temperature meters based on Pt100 resistance temperature sensors. References 5, figures 4, tables 3.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41771575","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":"MATHEMATICAL MODEL OF A FLEXIBLE MICRO GRID INTEGRATED INTO THE COUNTRY GRID","authors":"S.E. Saukh, A. Borysenko","doi":"10.15407/techned2023.02.061","DOIUrl":"https://doi.org/10.15407/techned2023.02.061","url":null,"abstract":"The functioning of local electric networks ('Micro Grid') is described, which due to the development of Smart Network technologies, distributed generation and electricity storage systems received an incentive for development. The structural decomposition of the market model is suggested for the 'Top-Level Market' and 'Micro Grid' local systems to reflect the interaction of the 'Micro Grid' with the wholesale electricity market. Load regulation instruments are described, which ensure the flexibility of the Micro Grid. A mathematical model of the 'Micro Grid' system is proposed, which formulated as a Unit commitment problem. The computational experiment shows the adequacy of the results of modelling of 'Micro Grid' systems. References 9, figures 4, tables 2.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49091777","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":"MODIFICATION OF THE MASTER GENERATOR METHOD USED FOR FREQUENCY AND VOLTAGE CONTROL IN ISOLATED POWER SYSTEMS WITH PARALLEL OPERATING AC GENERATORS","authors":"L. Mazurenko, O. Dzhura, M. Shykhnenko, A. Kotsiuruba","doi":"10.15407/techned2023.02.028","DOIUrl":"https://doi.org/10.15407/techned2023.02.028","url":null,"abstract":"Such methods as droop method, curve shifting method and master-slave method were primarily developed for voltage and frequency regulation in isolated power systems with synchronous generators. In modern power systems induction generators, regulated dump loads, energy storage devices with AC/DC and AC/DC/AC power converters, etc. are used in addition to synchronous generators. The investigation of new configurations of power systems is closely tied with further development of control methods for load sharing and regulation of voltage and frequency of the systems. The article reviews simple-to-implement known control methods used for control of isolated power systems with parallel operated synchronous generators and proposes a modification of the master-slave method for control of power systems with parallel operated synchronous and induction generators, static var compensators, dump loads and energy storage devices with interface power converters. The system “Hydroelectric unit with a synchronous generator - dump load - hydroelectric unit with an induction generator - compensating capacitors - transformer – AC local load\" is considered and two techniques for regulation of electric frequency and voltage magnitude in the specified system are presented with accordance to the statements of the proposed modified method. The proposed control algorithm of the dump load frequency controller is in agreement with the control algorithm of the speed controller of the master unit. The functions assigned to the electronic PID speed controller of the master unit are to maintain the electric frequency in the system equal to nominal value and regulate the active power sharing. Verification of the proposed control algorithms for isolated electric power systems was carried out. References 23, figures 5, table 1.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47186722","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 DYNAMIC CHARACTERISTICS OF REGULATION SYSTEMS WITH ONE-SIDED AND TWO-SIDED PULSE-WIDTH MODULATIONS","authors":"Y.V. Shcherback, K. Ivakina","doi":"10.15407/techned2023.02.009","DOIUrl":"https://doi.org/10.15407/techned2023.02.009","url":null,"abstract":"The purpose of the article is: to determine the dynamic properties of automatic control systems of the pulse DC voltage converter with one-way and two-way modulations by studying the influence of the form of the reference signal on dy-namic processes in the systems of automatic control of the output coordinate of the converter with widely used propor-tional (P), integral (I) and proportionally - by integral (PI) regulators. The novelty of the proposed work lies in the de-termination of the influence of one-sided and two-sided pulse width modulation on the stability and conditions of the process of the finite duration of the automatic control system of the pulse converter of constant voltage. The dynamic characteristics of the system are investigated using impulse models of the pulse DC voltage converter and the use of the Z-transformation mathematical apparatus and simulation modeling. Analytical dependencies were obtained: stability conditions for proportional, integral and proportional-integral regulators; conditions of the process of finite duration of finite duration in a system with an aperiodic link in the load circuit; oscillograms of transition processes that confirm the theoretical results. The practical value lies in the fact that the results obtained in the work provide, during the de-velopment of an automatic regulation system with given parameters, the possibility of optimal selection of the type of pulse-width modulation. References 17, figures 15.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47475477","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":"ANALYSIS OF THE IMPACT OF NETWORK OPERATION REGIMES ON THE LEVEL OF ACCOUNTING ACTIVE AND REACTIVE ELECTRICITY","authors":"Yu.F. Tesik, O. Karasinskiy, R. Moroz, S.Iu. Pronzeleva, M.V. Zaikov","doi":"10.15407/techned2023.02.069","DOIUrl":"https://doi.org/10.15407/techned2023.02.069","url":null,"abstract":"One of the reasons of losses of the electric power caused by imperfection of means of its account is revealed. The analysis of errors of means of the account of active and reactive energy in the conditions of work of a network in low-sine and low-sine modes is executed. The dependences of the angular errors of the means of measuring active and reactive energy are found. The graph of the change of the angular error of the active energy meter in the range of phase shift angles between voltage and current from -2 to 2 and the graph of the angular error of the reactive energy meter in the range of phase shift angles be-tween voltage and current from -0 degrees to are presented. The loss of active energy due to imperfection of active energy meters reaches infinity under the conditions of approaching the phase shift angle between current and voltage vectors to 2, and the loss of reactive energy reaches infinity under the conditions of approaching the phase shift between current and volt-age vectors to  are shown. The errors of active energy measurement are calculated, which indicate the unsuitability of elec-tricity meters manufactured in accordance with existing standards for metering of electricity in low-cosine modes of network operation. References 14, figures 2, tables 1.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42316412","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":"INFLUENCE OF THE NUMBER OF ROTATION WINDING PHASES ON THE STRUCTURE AND PROPERTIES OF ELECTRIC MACHINE WITH THREE DEGREES OF FREEDOM ROTOR","authors":"І.S. Petukhov, V.G. Кireyev, К.P. Akinin, V. Lavrinenko","doi":"10.15407/techned2023.02.045","DOIUrl":"https://doi.org/10.15407/techned2023.02.045","url":null,"abstract":"The structure of an electric machine with a rotor, which has three degrees of freedom of rotation (EMTR) and consists of external and internal magnetic circuits, is considered. Between them, in the air gap of a spherical configuration, there is an m-phase rotation winding and a control winding. The excitation of the magnetic field in the EMTR is carried out by means of permanent magnets located on the external magnetic circuit. The scope of application of EMTP in systems of stabilization, observation, tracking, where the rotor performs the function of a gyro-stabilizing element, is outlined. Taking into account the structure of the considered EMTR, the absence of eddy currents in the design and the suitability of the mathematical model of the static magnetic field are substantiated. The calculation of the torque of the EMTR with two- and three-phase rotational windings at different angles of rotor’s inclination relative to the stator axis has been performed. It is shown that the rotation torque of the three-phase winding is 20% higher than that of the two-phase winding. A signifi-cant influence of the control winding on the torque of the three-phase winding and approximately the same influence of the two- and three-phase rotation windings on the processional torque with a significant value of the rotor inclination angle are noted. References 7, figures 8, tables 1.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47774633","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":"INCREASING THE EFFICIENCY OF THE SURFACE-MOUNTED ULTRASONIC ELECTROMAGNETIC-ACOUSTIC TRANSDUCER ON ACCOUNT OF THE MAGNETIC FIELD SOURCE","authors":"G. Suchkov, V. Bolyukh, A. Kocherga, R. Mygushchenko, O. Kropachek","doi":"10.15407/techned2023.02.003","DOIUrl":"https://doi.org/10.15407/techned2023.02.003","url":null,"abstract":"Model studies were carried out using the COMSOL Multiphysics package, aimed at ensuring the forming of a permanent magnet magnetic field at a considerable distance to a ferromagnetic product from its pole, which is necessary to create efficient portable ultrasonic electromagnetic-acoustic transducers of thickness gauges and testing and diagnostic devices. It is theoretically shown and experimentally confirmed that for portable measuring ultrasonic devices it is expedient to set the height of the permanent magnet at about 60 mm and the cross section of the magnet pole 50x50 mm2. At the same time, with a gap between the magnet pole and the product of about 30 mm, the value of the normal component of the magnetic field induction near the surface of the object is about 0.3...0.4 T, which is sufficient for thickness gauging or diagnostics of ferromagnetic products using the ultrasonic pitch-and-catch method. References 19, figures 8.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43954030","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}