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Известия высших учебных заведений. Электромеханика最新文献

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Investigation of the Frequency Start of a Double-Motor Electric Drive of a Scraper Conveyor by the Method of Mathematical Modeling 用数学建模方法研究刮板输送机双电机电动驱动的频率启动
Известия высших учебных заведений. Электромеханика Pub Date : 1900-01-01 DOI: 10.17213/0136-3360-2022-1-49-55
G. Babokin, D. Shprekher, E. Kolesnikov, D. Ovsyannikov
{"title":"Investigation of the Frequency Start of a Double-Motor Electric Drive of a Scraper Conveyor by the Method of Mathematical Modeling","authors":"G. Babokin, D. Shprekher, E. Kolesnikov, D. Ovsyannikov","doi":"10.17213/0136-3360-2022-1-49-55","DOIUrl":"https://doi.org/10.17213/0136-3360-2022-1-49-55","url":null,"abstract":"A simulation mathematical model of the SC electric drive is presented, which makes it possible to study the pro-cesses of frequency start-up and evaluate the effect of the intensity of frequency change at the output of the fre-quency converter on the maximum values of the starting current and efforts in the traction element (TE) with dif-ferent loading of the conveyor. The dependences of the starting current value, the starting time of the SC and the maximum efforts in the TE are obtained depending on the start-up rate and the conveyor load. An algorithm for the frequency start-up of the SC has been developed, which ensures the reduction of dynamic loads in the con-veyor electric drive. The model experiment showed that in order to reduce the starting currents and limit the ef-forts in maintenance to safe values while maintaining the conveyor performance, it is necessary to change the intensity of the frequency change at the output of the frequency converter (FC) when starting the conveyor as a function of the conveyor load.","PeriodicalId":105792,"journal":{"name":"Известия высших учебных заведений. Электромеханика","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134600642","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
Methodology for Designing an Induction Levitator 感应式悬浮器的设计方法
Известия высших учебных заведений. Электромеханика Pub Date : 1900-01-01 DOI: 10.17213/0136-3360-2022-2-69-75
N. Pirieva
{"title":"Methodology for Designing an Induction Levitator","authors":"N. Pirieva","doi":"10.17213/0136-3360-2022-2-69-75","DOIUrl":"https://doi.org/10.17213/0136-3360-2022-2-69-75","url":null,"abstract":"The article presents analytical expressions for the main design parameters of the current and power modes of electri-cal devices with various levitation elements for the development of a generalized design method and analyzes for solv-ing design problems. In order to develop a method for the generalized design of an induction levitator, taking into account the parameters of current modes and forces, design indicators were determined. The obtained analytical ex-pressions of the indicators are analyzed and their numerical values are found, the knowledge of which is necessary when solving the problems of designing electrical apparatus with induction levitation elements. Based on the analysis of existing theories and calculations of electrical apparatus with levitation elements, the general indicators necessary for design have been established. For these indicators, simple analytical expressions are obtained through dimension-less quantities.","PeriodicalId":105792,"journal":{"name":"Известия высших учебных заведений. Электромеханика","volume":"7 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114034921","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: 1
Computer Models of Pem Fuel Cells for the Study of Transient Modes in Electrical Power Supply Complexes 用于研究电源系统瞬态模式的Pem燃料电池计算机模型
Известия высших учебных заведений. Электромеханика Pub Date : 1900-01-01 DOI: 10.17213/0136-3360-2021-3-60-67
I. Vasyukov
{"title":"Computer Models of Pem Fuel Cells for the Study of Transient Modes in Electrical Power Supply Complexes","authors":"I. Vasyukov","doi":"10.17213/0136-3360-2021-3-60-67","DOIUrl":"https://doi.org/10.17213/0136-3360-2021-3-60-67","url":null,"abstract":"Static and dynamic computer models of fuel cells are considered. A static model is determined that most ac-curately reproduces the current-voltage characteristic of a real fuel cell. A method for tuning it according to the experimental I - V characteristic by the least squares method is proposed. A method for its adjustment ac-cording to the experimental I - V characteristic by the method of gradient descent is proposed. A modified elec-trical equivalent circuit of a fuel cell has been developed, which simulates its dynamic response, taking into ac-count the damping effect of eddy currents during operation of a stack of fuel cells on a pulse voltage converter. A method is proposed for determining the parameters of the model from the experimental oscillograms of the current and voltage of the stack. A universal model of a stack of fuel cells in LTspice has been developed, which makes it possible to simulate a dynamic response and, if necessary, simulate a real static I – V characteristic of the stack.","PeriodicalId":105792,"journal":{"name":"Известия высших учебных заведений. Электромеханика","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114418389","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
Research of Load Unbalance of a Two- Motor Variable Frequency Dtive for Scraper Conveyor 刮板输送机双电机变频传动负载不平衡研究
Известия высших учебных заведений. Электромеханика Pub Date : 1900-01-01 DOI: 10.17213/0136-3360-2021-4-5-37-45
D. Shprekher, G. Babokin, E. Kolesnikov, D. Ovsyannikov
{"title":"Research of Load Unbalance of a Two- Motor Variable Frequency Dtive for Scraper Conveyor","authors":"D. Shprekher, G. Babokin, E. Kolesnikov, D. Ovsyannikov","doi":"10.17213/0136-3360-2021-4-5-37-45","DOIUrl":"https://doi.org/10.17213/0136-3360-2021-4-5-37-45","url":null,"abstract":"The article analyzes the uneven loading of the scraper conveyor electric motors. The most common type of multi-motor conveyor is considered here: two-drive, with head and end drives connected through gearboxes and sprockets by an endless chain with scrapers. The simulation results are presented for three variants of com-binations of parameters of electric drives. It has been established that the use of a two-motor variable frequen-cy drive of a scraper conveyor powered by a single frequency converter inevitably entails uneven loading of the electric motors of the head and end drives. To eliminate this disadvantage, it is proposed to supply each electric motor from its own frequency converter. A system of automatic load balancing is proposed. The implementation and the result of the work of the load balancing system are carried out on a model in the Matlab / Simulink system.","PeriodicalId":105792,"journal":{"name":"Известия высших учебных заведений. Электромеханика","volume":"356 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115898676","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: 1
Designing of Digital Control Systems by Dynamic Objects with Uncertain Nonlinearity 具有不确定非线性动态对象的数字控制系统设计
Известия высших учебных заведений. Электромеханика Pub Date : 1900-01-01 DOI: 10.17213/0136-3360-2021-4-5-53-63
V. Lachin, A. Gaiduk, Alexandr Muzhenko
{"title":"Designing of Digital Control Systems by Dynamic Objects with Uncertain Nonlinearity","authors":"V. Lachin, A. Gaiduk, Alexandr Muzhenko","doi":"10.17213/0136-3360-2021-4-5-53-63","DOIUrl":"https://doi.org/10.17213/0136-3360-2021-4-5-53-63","url":null,"abstract":"This article is devoted to development of a method of the digital control systems design with not gaged state variables of the object with uncertain nonlinearity. Application of two observers to find the asymptotic es-timates of the nonlinearity and the state vector of the object is the main feature of the developed approach. The problem of designing is solved on the basis of the discrete-time model of the object with application of the con-trol on output and impacts and the standard normalized transfer functions. It allows to provide the required indicators of quality both in established, and in a transient mode. The numerical example illustrates effectiveness of the developed method. The obtained results can be used to design of digital control systems which can significantly increase effectiveness of the controlled objects as production and special assignment.","PeriodicalId":105792,"journal":{"name":"Известия высших учебных заведений. Электромеханика","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115143692","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
Simulation of Nonlinear Magnetic Systems by the Finite Element Method Using BLR-Factorization 基于blr分解的非线性磁系统有限元仿真
Известия высших учебных заведений. Электромеханика Pub Date : 1900-01-01 DOI: 10.17213/0136-3360-2021-4-5-14-19
A. Khoroshev
{"title":"Simulation of Nonlinear Magnetic Systems by the Finite Element Method Using BLR-Factorization","authors":"A. Khoroshev","doi":"10.17213/0136-3360-2021-4-5-14-19","DOIUrl":"https://doi.org/10.17213/0136-3360-2021-4-5-14-19","url":null,"abstract":"The possibility of practical application of BLR-factorization (low-rank approximation of the matrix of un-knowns of a system of linear equations) for finite element modeling of the electromagnetic field topology of nonlinear magnetic systems is considered. A method for estimating the accuracy of the computed solution of the SLAE and the nature of the influence of the given accuracy of the low-rank approximation of the matrix of un-knowns on the upper limit of the relative forward error of the computed solution of the SLAE are shown. Using a model problem as an example, the dependence of the accuracy of calculating the integral characteristics of an electromechanical apparatus on the tolerance of the low-rank approximation of the matrix of unknowns is shown, as well as its effect on the convergence of the process of solving a nonlinear numerical problem. A quantitative assessment of the reduction in the computational complexity of the process of solving a numerical problem and the required amount of computer memory for solving the SLAE is carried out. The applicability of BLR-factorization for finite element modeling of the topology of the electromagnetic field without the use of numerical methods of the Krylov subspace is estimated.","PeriodicalId":105792,"journal":{"name":"Известия высших учебных заведений. Электромеханика","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115532303","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
Foucault Displacement Currents in the Dynamics of an Asymmetric System 非对称系统动力学中的福柯位移电流
Известия высших учебных заведений. Электромеханика Pub Date : 1900-01-01 DOI: 10.17213/0136-3360-2022-3-3-9
S. Gerasimov
{"title":"Foucault Displacement Currents in the Dynamics of an Asymmetric System","authors":"S. Gerasimov","doi":"10.17213/0136-3360-2022-3-3-9","DOIUrl":"https://doi.org/10.17213/0136-3360-2022-3-3-9","url":null,"abstract":"The article considers the Ponderomotive forces acting on non-closed Foucault conduction currents in a symmetric conductor. The example of a symmetric conductor located in an axially symmetric, external alternating magnetic field being given. These currents are closed by displacement currents, which are affected by the magnetic field of conduc-tion currents in a conductor producing the Abraham force. It is shown that the alternating magnetic field created by the displacement currents has no effect on the conduction currents in the conductor. The only magnetic force, the av-erage value of which for the period of oscillations of the external magnetic field is not equal to zero, is the self-action force with which the conductor acts on itself. The sum of Abraham's forces and self-action is equal to zero which cor-responds to the law of conservation of momentum. The traction force, the role of which is played by the self-acting force is maximal at the greatest inhomogeneity of the source of the external variable field at its periphery","PeriodicalId":105792,"journal":{"name":"Известия высших учебных заведений. Электромеханика","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123499801","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
The Need for Structural and Functional Changes in the Rural Low Voltage Distribution Network 农村低压配电网结构与功能变革的必要性
Известия высших учебных заведений. Электромеханика Pub Date : 1900-01-01 DOI: 10.17213/0136-3360-2019-3-69-79
A. Bogdan, A. Vinnikov, I. Nadtoka, P. Osadchiy, V. Tropin, Networks Pyatigorsk Enterprise Stavropolenergo
{"title":"The Need for Structural and Functional Changes in the Rural Low Voltage Distribution Network","authors":"A. Bogdan, A. Vinnikov, I. Nadtoka, P. Osadchiy, V. Tropin, Networks Pyatigorsk Enterprise Stavropolenergo","doi":"10.17213/0136-3360-2019-3-69-79","DOIUrl":"https://doi.org/10.17213/0136-3360-2019-3-69-79","url":null,"abstract":"","PeriodicalId":105792,"journal":{"name":"Известия высших учебных заведений. Электромеханика","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122997158","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: 1
Improving Algorithms for Control Thickness and Profile of Roll Gap in Reversing Rolling Stand at Thick-Gage Rolling Mill 厚板轧机可逆轧机机架辊缝厚度和辊缝轮廓控制的改进算法
Известия высших учебных заведений. Электромеханика Pub Date : 1900-01-01 DOI: 10.17213/0136-3360-2019-4-53-64
A. Karandaev, V. Khramshin, V. Gasiyarov, S. Voronin, B. Loginov, Magnitogorsk Iron, Steel Works
{"title":"Improving Algorithms for Control Thickness and Profile of Roll Gap in Reversing Rolling Stand at Thick-Gage Rolling Mill","authors":"A. Karandaev, V. Khramshin, V. Gasiyarov, S. Voronin, B. Loginov, Magnitogorsk Iron, Steel Works","doi":"10.17213/0136-3360-2019-4-53-64","DOIUrl":"https://doi.org/10.17213/0136-3360-2019-4-53-64","url":null,"abstract":"","PeriodicalId":105792,"journal":{"name":"Известия высших учебных заведений. Электромеханика","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121880255","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
Using Phase Coordinates for the Development of Crite- ria Determining the Point of Damage in Rural 35-10-6 kV Electric Grids 用相位坐标制定农村3510-6 kV电网损伤点判定准则
Известия высших учебных заведений. Электромеханика Pub Date : 1900-01-01 DOI: 10.17213/0136-3360-2022-3-80-87
V. Soldatov, N. Klimov, A. Yablokov
{"title":"Using Phase Coordinates for the Development of Crite- ria Determining the Point of Damage in Rural 35-10-6 kV Electric Grids","authors":"V. Soldatov, N. Klimov, A. Yablokov","doi":"10.17213/0136-3360-2022-3-80-87","DOIUrl":"https://doi.org/10.17213/0136-3360-2022-3-80-87","url":null,"abstract":"The article is devoted to the issue of detecting the fault location in 35-10-6 kV power distribution networks according to the criteria obtained which are individual for each type of damage. When developing the criteria, phase voltages and currents calculated at the beginning of the line were used. An analysis of changes in these parameters has been made, with the place of the fault initiation being moved. Interpolating functions have been developed that make it pos-sible to calculate the location of damage and the error in determining the location of damage. The calculations con-firmed the criteria accuracy for any parameters of the 35-10-6 kV network. The effectiveness of the considered method is proved by technical and economic indicators.","PeriodicalId":105792,"journal":{"name":"Известия высших учебных заведений. Электромеханика","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125215674","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
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