Russian Electrical Engineering最新文献_第3页

Pulsations of the Electromagnetic Torque of Synchronous Motors Excited by Permanent Magnets of Slotless Design 无槽设计永久磁铁激励同步电机电磁转矩的脉动

Russian Electrical Engineering Pub Date : 2024-08-05 DOI: 10.3103/s1068371224700391

G. O. Heinrich, A. F. Shevchenko

引用次数: 0

A High-Velocity Multistage Electromagnetic Accelerator 高速多级电磁加速器

Russian Electrical Engineering Pub Date : 2024-08-05 DOI: 10.3103/s1068371224700366

V. Yu. Neyman

引用次数: 0

A Methodology for Recalculation of Parameters of Submersible Induction Motors Operating in Nonnominal Modes 重新计算在非额定模式下运行的潜水感应电机参数的方法

Russian Electrical Engineering Pub Date : 2024-08-05 DOI: 10.3103/s1068371224700421

D. M. Toporkov, E. A. Domakhin, V. V. Fakhreeva, A. S. Lobacheva, G. N. Chusovitin

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Reducing the Harmonics Level in a Three-Level Single-Phase Autonomous Inverter without Pulse-Width Modulation 降低无脉宽调制三电平单相自主逆变器中的谐波水平

Russian Electrical Engineering Pub Date : 2024-08-05 DOI: 10.3103/s1068371224700445

N. I. Shchurov, S. V. Myatezh, P. S. Lisitsyn, E. Yu. Abramov, R. N. Latyshev

{"title":"Reducing the Harmonics Level in a Three-Level Single-Phase Autonomous Inverter without Pulse-Width Modulation","authors":"N. I. Shchurov, S. V. Myatezh, P. S. Lisitsyn, E. Yu. Abramov, R. N. Latyshev","doi":"10.3103/s1068371224700445","DOIUrl":"https://doi.org/10.3103/s1068371224700445","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>An autonomous multilevel single-phase inverter with no applied pulse-width modulation (PWM) and capacitive voltage dividers, the output voltage curve of which is close to a sine-wave shape and corresponds to the contemporary standards of electrical energy quality for 0.38-kV networks is considered. As compared with inverters with the use of PWM, the proposed inverter, owing to the use of low switching frequencies for power semiconductors at a level of the industrial frequency of 50 Hz and due to the optimal use of different-level amplitudes, should not generate significant electromagnetic interference and not cause accelerated wear in the insulation of connected equipment. Studies that have been performed with mathematical and physical models have demonstrated the potentiality of obtaining a voltage with a permissible harmonic coefficient at a level of KHU amounting to about 6.36% for 0.38-kV networks with the use of a three-level autonomous inverter constructed based on a three-core magnetic circuit of the transformer with a passive LC filter containing a sequential resonant circuit.","PeriodicalId":39312,"journal":{"name":"Russian Electrical Engineering","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946907","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

A Dynamic Model for a Pulse Electromagnetic Drive with a Controlled Striker Position 带可控击杆位置的脉冲电磁驱动器动态模型

Russian Electrical Engineering Pub Date : 2024-08-05 DOI: 10.3103/s1068371224700378

L. A. Neyman, V. Yu. Neyman

引用次数: 0

Discrimination of Stator Asymmetries and Magnetic Saturation in Self-Excited Induction Generators 自激式感应发电机定子不对称和磁饱和的识别

Russian Electrical Engineering Pub Date : 2024-08-05 DOI: 10.3103/s1068371224700469

D. Kouchih, R. Hachelaf

{"title":"Discrimination of Stator Asymmetries and Magnetic Saturation in Self-Excited Induction Generators","authors":"D. Kouchih, R. Hachelaf","doi":"10.3103/s1068371224700469","DOIUrl":"https://doi.org/10.3103/s1068371224700469","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>This work involves an efficient approach for the modeling and discrimination of the stator asymmetries and magnetic saturation in the self-excited induction generators. For this purpose, an improved model considering magnetic saturation has been developed for the self-excited induction generators operating under asymmetrical load conditions. Magnetic saturation must be considered for the modeling and analysis of the self-excited induction generators. This is because linear modeling with fixed parameters never makes it possible to analyze the performances of such machines. Due to fact that the magnetic saturation and stator asymmetries both cases generate similar harmonic components through the stator voltages and currents, we have to elaborate an improved model to evaluate the electromagnetic performances and to clearly discriminate the stator asymmetries and magnetic saturation. The contribution of this work is that a state model has been developed considering the increase of the common point voltage during asymmetrical conditions and the derivation of the machine inductances due to magnetic saturation. Various electromagnetic characteristics have been extracted such as stator voltages, currents and common point voltage. It will be deduced that the common point voltage can be considered as an interesting signal for the discrimination of the stator asymmetries and magnetic saturation. The concordance between simulation and experimental results shows the consistency of this approach for the modeling and discrimination of the stator asymmetries and magnetic saturation in the self-excited induction generators.","PeriodicalId":39312,"journal":{"name":"Russian Electrical Engineering","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946909","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

On the Impact of Strong Electromagnetic Fields on Fiber-Optic Communication Lines 强电磁场对光纤通信线路的影响

Russian Electrical Engineering Pub Date : 2024-06-14 DOI: 10.3103/s106837122470024x

S. Yu. Kazantsev, O. S. Belova, D. V. Bolotov, S. A. Elfimov, D. I. Kovalev, S. S. Zhulikov

{"title":"On the Impact of Strong Electromagnetic Fields on Fiber-Optic Communication Lines","authors":"S. Yu. Kazantsev, O. S. Belova, D. V. Bolotov, S. A. Elfimov, D. I. Kovalev, S. S. Zhulikov","doi":"10.3103/s106837122470024x","DOIUrl":"https://doi.org/10.3103/s106837122470024x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>Results of physical simulation of the impact of lightning electromagnetic radiation on fiber-optic communication lines performed using a lightning current generator are presented. In the course of simulation of the lightning current, the first component of the lightning current was formed: a current pulse of the first reverse discharge with an amplitude of more than 190 kA and a front duration of 4 μs. A completely dielectric fiber-optic cable was located at different distances from the discharge gap or outside the screened room in which the lightning current generator was located. Linearly polarized radiation was used as a signal transmitted via a fiber-optic cable. The rotation of the plane of polarization was recorded by measuring the power of the transmitted signal. A rapid change in the state of polarization of the transmitted signal was revealed at the moment of discharge of the lightning-current generator. A surge in the optical radiation power was observed for a cable laid close to and at a distance from the discharge gap. The power of optical radiation transmitted through a cable laid outside the screened room practically did not change at the time of discharge. A hypothesis has been made that the electrical component of the electromagnetic field induced by a lightning discharge makes a more significant contribution to the rotation of the polarization plane than does magnetic component.","PeriodicalId":39312,"journal":{"name":"Russian Electrical Engineering","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503364","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 Effect of Surface Conductivity on the Accumulation and Dissipation of Static Electricity Charges on the Surface of Polymer Dielectrics 表面电导率对聚合物电介质表面静电荷积累和消散的影响

Russian Electrical Engineering Pub Date : 2024-06-14 DOI: 10.3103/s1068371224700275

S. S. Zhulikov, D. I. Kovalev, A. G. Temnikov, I. V. Korolev

{"title":"The Effect of Surface Conductivity on the Accumulation and Dissipation of Static Electricity Charges on the Surface of Polymer Dielectrics","authors":"S. S. Zhulikov, D. I. Kovalev, A. G. Temnikov, I. V. Korolev","doi":"10.3103/s1068371224700275","DOIUrl":"https://doi.org/10.3103/s1068371224700275","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The results of studies of the effect of specific surface conductivity γS on the accumulation and dissipation of static electricity (SE) charges on the surface of polymer dielectrics are presented. Samples with a thickness of 1–5 mm with a specific volumetric conductivity of γV60 ≤ 10—12 Ω–1 m–1 were selected for research. It has been found that such dielectrics are characterized by the absence of a steady-state mode after voltage application, since the current flowing through the volume of the dielectric is constantly decreasing. The dependence of γS on the tangential component of constant electric field strength γS = f(Eτ) in the range Eτ = 5 × 102–5 × 105 V/m is studied. It has been found that, for dielectrics with a basic surface conductivity of γS0 < 10–12 Ω–1, a nonlinear dependence of γS = f(Eτ) is observed, and this nonlinearity increases with a decrease in γS0. It has also been found that a more pronounced nonlinearity γS = f(Eτ) is characteristic of hydrophobic dielectrics. Mathematical modeling of the accumulation and dissipation of SE charges is performed without and with taking into account the nonlinear dependence of γS = f(Eτ). It is concluded that, for dielectrics with γV60 ≤ 10–12 Ω–1 m–1, only surface conductivity can be taken into account; moreover, while γS = const for hydrophilic dielectrics, for hydrophobic dielectrics it is necessary to take into account the nonlinear dependence γS = f(Eτ).","PeriodicalId":39312,"journal":{"name":"Russian Electrical Engineering","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503303","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

Problems in Developing Polymeric Composite Insulation with a High Level of Electrical and Thermal Characteristics 开发具有高水平电热特性的聚合物复合绝缘材料的问题

Russian Electrical Engineering Pub Date : 2024-06-14 DOI: 10.3103/s1068371224700263

D. I. Kovalev, V. N. Varivodov, D. V. Golubev, S. S. Zhulikov, S. A. Elfimov

引用次数: 0

Modern Insulation Materials and Media for High-Voltage Equipment 用于高压设备的现代绝缘材料和介质

Russian Electrical Engineering Pub Date : 2024-06-14 DOI: 10.3103/s1068371224700251

V. N. Varivodov, D. I. Kovalev, D. V. Golubev, S. S. Zhulikov, S. A. Elfimov

引用次数: 0