Technical Electrodynamics最新文献_第9页

DETERMINATION OF ACTIVE POWER LOSSES COMPONENTS IN LONG-DISTANCE AC POWER TRANSMISSION 长距离交流输电有功功率损耗分量的确定

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.054

T. Katsadze, V.V. Chizhevskyi, N. V. Buslova, V. V. Cherkashina

引用次数: 0

SERIES RESONANT INVERTERS WITH MODULAR STRUCTURE FOR HIGH-FREQUENCY INDUCTION HEATING 用于高频感应加热的模块化结构串联谐振逆变器

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.015

V. Hutsaliuk

引用次数: 0

COMPARATIVE ANALYSIS OF ELECTRIC MACHINES CHARACTERISTICS WITH PERMANENT MAGNETS FOR ELECTRIC VEHICLES AND WIND TURBINES 电动汽车与风力发电机用永磁体电机特性比较分析

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.021

V. Grebenikov, V. Pavlov, R. Gamaliia, V. Popkov

{"title":"COMPARATIVE ANALYSIS OF ELECTRIC MACHINES CHARACTERISTICS WITH PERMANENT MAGNETS FOR ELECTRIC VEHICLES AND WIND TURBINES","authors":"V. Grebenikov, V. Pavlov, R. Gamaliia, V. Popkov","doi":"10.15407/techned2022.04.021","DOIUrl":"https://doi.org/10.15407/techned2022.04.021","url":null,"abstract":"The results of a numerical and experimental study of an electric machine with cylindrical permanent magnets are presented. It is shown that if a squirrel-cage rotor in a standard induction motor is replaced by a rotor with permanent magnets, then a significant increase in the specific power of the electric machine can be obtained. Numerical studies and analyses of the characteristics of an electric machine with tangentially magnetized neodymium and ferrite magnets in the motor mode have been carried out. It is shown that in order to ensure maximum specific characteristics for use in electric vehicles, it is necessary to take into account the driving cycle and carry out liquid cooling of the electric motor. Also, a comparison of the characteristics obtained during testing of an experimental sample in the generator mode and the characteristics obtained in the calculation models was made. It is shown that the discrepancy between the calculated and experimental dependences for several values of the rotor speed is no more than 4%. The characteristics of the electrical machines under study were calculated using the Simcenter MagNet and Simcenter MotorSolve software packages. References 7, figures 6, tables 2.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44278284","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}

引用次数: 0

RESONANT MODES OF A LINEAR PERMANENT MAGNET VIBRATORY MOTOR 线性永磁振动电机的谐振模式

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.028

R. Bondar

{"title":"RESONANT MODES OF A LINEAR PERMANENT MAGNET VIBRATORY MOTOR","authors":"R. Bondar","doi":"10.15407/techned2022.04.028","DOIUrl":"https://doi.org/10.15407/techned2022.04.028","url":null,"abstract":"The work considers the resonant operation modes of the linear permanent magnet vibratory motor. On the basis of electrical and mechanical equivalent circuits with lumped parameters, expressions for determining the frequencies of mechanical, electrical, energy and power resonances are obtained. The presence of two frequencies of electrical resonance (when the phases of supply voltage and motor current coincide) in a single-mass electromechanical system and four in a two-mass one is substantiated. Representing, according to the electromechanical analogy approach, the back EMF induced due to the movement of the mover by the corresponding voltage drop, expressions for equivalent mechanical impedances are obtained. The dependences of the energy characteristics of the motor (mechanical work and efficiency) on the equivalent circuit parameters are obtained. Based on the expression for the reluctance electromagnetic force, mechanical work is found and its dependence on the phase difference between displacement and current is shown. The phase difference at which the total mechanical work of the motor is maximal is determined. It is shown that the results of the analysis of resonant modes well agree with results of a numerical field study carried out on the basis of the equations of the quasi-stationary magnetic field in the time domain using the finite element method and the moving type of calculation mesh in the mover region. References 12, figures 6, tables 1.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46703877","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}

引用次数: 0

SYNTHESIS OF MODELS OF LOCAL POWER SYSTEMS WITH DISTRIBUTED GENERATION SOURCES 分布式电源局部电力系统模型的综合

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.048

 С.П. Денисюк, Д.Г докт.техн.наук, Дерев’янко, Г.С канд.техн.наук, Бєлоха, канд.техн наук

引用次数: 3

PHYSICAL AND TECHNICAL-ECONOMIC ASPECTS OF MODERN METHODS OF WATER TREATMENT FOR THERMAL AND NUCLEAR POWER ENGINEERING 热能和核能工程水处理的现代方法的物理和技术经济方面

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.069

N. Shydlovska, S. Zakharchenko, M. Zakharchenko, I. Mazurenko, M. Kulida

{"title":"PHYSICAL AND TECHNICAL-ECONOMIC ASPECTS OF MODERN METHODS OF WATER TREATMENT FOR THERMAL AND NUCLEAR POWER ENGINEERING","authors":"N. Shydlovska, S. Zakharchenko, M. Zakharchenko, I. Mazurenko, M. Kulida","doi":"10.15407/techned2022.04.069","DOIUrl":"https://doi.org/10.15407/techned2022.04.069","url":null,"abstract":"A critical analysis of modern electric-physical and electric-chemical methods of water treatment is given in the context of the efficiency of treatment surface natural waters for the thermal and nuclear power engineering. Physical aspects of electric-chemical coagulation are considered. Theoretical values of the specific energy of destruction of passivation films on the surface of aluminum and iron electrodes, as well as the minimum voltages required for this, are calculated. The mechanisms of conversion of the energy of discharge pulses in a layer of granules of metal forming a coagulant immersed in water are described. According to the described model of energy conversion processes, the minimum theoretical values of the specific energy of the formation of erosive Al and Fe particles from molten and evaporated metal are calculated. A technique for studying the energy efficiency of plasma-erosion coagulation under laboratory conditions is described, and the results of these studies are presented. The specific energy of purification of 1 m3 of water by electric-chemical and plasma-erosion coagulation was calculated in various modes using Al and Fe as metals forming the coagulant. Based on the analysis of the obtained results, recommendations for ways to improve the energy efficiency of plasma-erosion coagulation modes are given. References 29, figure 1, table 1.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47642840","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}

引用次数: 0

IMPEDANCE BOUNDARY CONDITION OF NON-UNIFORM ELECTROMAGNETIC FIELD PENETRATION INTO CONDUCTING HALF-SPACE 非均匀电磁场穿透导电半空间的阻抗边界条件

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.003

Y. Vasetsky

引用次数: 0

OPTIMIZATION OF BALANCING IN A BRIDGE MEASURING CIRCUIT WITH A DIFFERENTIAL CONDUCTOMETRIC SENSOR 差分电导传感器桥式测量电路平衡的优化

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.078

V. Melnyk, P. Borshchov, O. Vasylenko, I.O. Brahynets

{"title":"OPTIMIZATION OF BALANCING IN A BRIDGE MEASURING CIRCUIT WITH A DIFFERENTIAL CONDUCTOMETRIC SENSOR","authors":"V. Melnyk, P. Borshchov, O. Vasylenko, I.O. Brahynets","doi":"10.15407/techned2022.04.078","DOIUrl":"https://doi.org/10.15407/techned2022.04.078","url":null,"abstract":"The article is devoted to solving the problem of the occurrence of an additive error in determining local changes in the electrical conductivity of electrolyte solutions under conditions of changes in the background electrical conductivity of the measurement medium, which often occurs in biosensor and other systems with a differential pair of conductometric transducers, if their electrical parameters are not identical. The goal is to provide a deep suppression of the influence of background changes with significant differences in both reactance and active resistance in the transducers of a pair of sensor. The essence of the issue, the causes and mechanism of this type of error, as well as the methods and means of its reduction, developed earlier, are briefly considered. A diagram and description of the structure of a differential conductometric channel of a biosensor system based on an AC bridge, an algorithm for its balancing operations by controlling the module and phase of the test voltage, as well as a vector diagram of currents and voltages in the bridge circuit during this process. The balancing of the bridge has been was modeled analytically, bringing it to a quasi-equilibrium state, in which changes in the background electrical conductivity do not change its output signal. Additional operations for balancing the bridge are determined to achieve such a state with significant differences in both capacitances and active resistances in the impedances of a pair of conductometric transducers of a differential sensor. The results of experimental studies of the suppression of the influence of changes in the background electrical conductivity of a solution in a differential conductometric channel with using its computer model and experimental sample of a conductometric instrument with an electrical equivalent of a differential sensor are presented. A comparison of the results obtained and the corresponding data for balancing bridge circuits by previously developed methods is given. References 16, figures 3, tables 3.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45209753","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}

引用次数: 2

MODEL OF OPTIMAL USE OF HYDRO POWER PLANTS IN THE ELECTRICITY MARKET 电力市场中水电厂优化利用模型

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.042

I. Blinov, D. Olefir, Y. Parus

引用次数: 2

MODELING OF ELECTROMAGNETIC PROCESSES IN A SECTIONAL CRYSTALIZER FOR ELECTROSLAG SURFACING OF METAL 金属电渣堆焊分段结晶器中电磁过程的建模

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.064

Y. Goryslavets, O. I. Bondar, V.M. Proskudin, Y. Kuskov, S. Rymar, A.V. Netyaha

引用次数: 0