Russian Electrical Engineering最新文献_第5页

A 3D Analytical Model of a Magnetoelectric Brushless DC Electric Motor 磁电式无刷直流电机的 3D 分析模型

Russian Electrical Engineering Pub Date : 2024-05-21 DOI: 10.3103/s1068371224700159

A. A. Afanasyev

{"title":"A 3D Analytical Model of a Magnetoelectric Brushless DC Electric Motor","authors":"A. A. Afanasyev","doi":"10.3103/s1068371224700159","DOIUrl":"https://doi.org/10.3103/s1068371224700159","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A mathematical model of a magnetoelectric brushless dc electric motor is considered, based on solving the 3D Laplace equation in partial derivatives using the method of separation of variables for nested hollow cylinders of finite length, the boundary conditions for which coincide with the boundary conditions of the magnetic field caused by constant magnets in closed rotor channels, stator winding currents, and induced magnetizations in both cores. The constants of the method of separation of variables are found from solving a system of linear algebraic equations, the matrix of which has a size of 24 × 18 in the example under consideration. The elements of the matrix are the Bessel, Infeld, and MacDonald functions with the corresponding eigenvalues. The distribution of magnetic induction in the air gap of the motor is analyzed. It is shown that the radial component of induction in a limited area near the edge of the cores experiences a surge. With equal shortening of the length of the stator and rotor cores, an increase in the radial magnetic induction in the air gap is observed due to an increase in the magnetic flux density in it, caused by the constancy of the magnetomotive force of the rotor and stator magnets in this procedure.</p>","PeriodicalId":39312,"journal":{"name":"Russian Electrical Engineering","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141150083","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

Control of VAr Compensator in the Quarry Electric Network 控制采石场电网中的 VAr 补偿器

Russian Electrical Engineering Pub Date : 2024-05-21 DOI: 10.3103/s1068371224700184

S. I. Malafeev, A. A. Malafeeva

引用次数: 0

A Synchronous Multiphase Electric Drive with Multichannel Control 带多通道控制的同步多相电动驱动器

Russian Electrical Engineering Pub Date : 2024-05-21 DOI: 10.3103/s1068371224700214

A. N. Golubev

{"title":"A Synchronous Multiphase Electric Drive with Multichannel Control","authors":"A. N. Golubev","doi":"10.3103/s1068371224700214","DOIUrl":"https://doi.org/10.3103/s1068371224700214","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A promising way to optimize the technical and economic characteristics of an ac electric drive is to have it designed based on an executive synchronous motor with an increased number of stator winding phases. However, due to the specific nature of the <i>m</i>-phase (<i>m</i> > 3) synchronous motor determined by the energy transfer by a whole spectrum of spatial field harmonics, electromechanical systems should be developed that take this feature into account. A method to study the adjustment characteristics of an <i>m</i>-phase synchronous motor is used, which is based on spectral vectors of electromagnetic parameters reduced to spatial field harmonics. A multichannel concept of realization of an <i>m</i>-phase synchronous electric drive is proposed, which enables targeted formation of the electromagnetic state of a synchronous motor through all its energy channels as a control object. Various ways of its implementation are considered. The advantages of the multiphase synchronous motor can be realized based on of the forced mutual orientation of the flux linkage vectors and the stator current for higher spatial harmonics, which provides the generation of additional constant components of the electromagnetic torque. This design of electric drives is advisable, in particular, for mobile installations with low-voltage (standalone) power sources.</p>","PeriodicalId":39312,"journal":{"name":"Russian Electrical Engineering","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141150032","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

Evaluating the Energy and the Exergy Efficiencies of Solar Photovoltaic Panels 评估太阳能光伏电池板的能效和放能效率

Russian Electrical Engineering Pub Date : 2024-05-21 DOI: 10.3103/s1068371224700226

Djoumana Merdja, Toufik Sebbagh

{"title":"Evaluating the Energy and the Exergy Efficiencies of Solar Photovoltaic Panels","authors":"Djoumana Merdja, Toufik Sebbagh","doi":"10.3103/s1068371224700226","DOIUrl":"https://doi.org/10.3103/s1068371224700226","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This research article delves into the comprehensive assessment of the energy and exergy efficiencies of two distinct solar photovoltaic (PV) panel technologies—olycrystalline and monocrystalline–deployed in the climatic context of Skikda, Algeria. The study aims to discern the superior performer among these two-panel types while taking into account the influential factors of solar radiation, and wind velocity. The results reveal that both panel technologies exhibit closely matched energy and exergy efficiencies, with a slight preference observed for monocrystalline panels. The impact of environmental variables on panel performance is significant, with temperature negatively affecting efficiency, while increased solar irradiance positively enhances energy and exergy production. Wind speed plays a cooling role, thereby augmenting electrical energy generation for both panel types. These findings contribute valuable insights into optimizing solar energy utilization in regions with warm and sun-drenched climates, like Skikda. The research serves as a crucial reference point for policymakers, researchers, and industry stakeholders keen on harnessing solar energy effectively under varying environmental conditions.</p>","PeriodicalId":39312,"journal":{"name":"Russian Electrical Engineering","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141150031","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 Use of Combined Star–Triangle Windings in Three-Phase Electric Motors: A Refined Analysis 在三相电机中使用组合星三角绕组：精细分析

Russian Electrical Engineering Pub Date : 2024-05-21 DOI: 10.3103/s1068371224700123

Yu. B. Kazakov, D. S. Smirnov, M. A. Kiselyov, I. V. Novikov, A. V. Zakharov

{"title":"The Use of Combined Star–Triangle Windings in Three-Phase Electric Motors: A Refined Analysis","authors":"Yu. B. Kazakov, D. S. Smirnov, M. A. Kiselyov, I. V. Novikov, A. V. Zakharov","doi":"10.3103/s1068371224700123","DOIUrl":"https://doi.org/10.3103/s1068371224700123","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The use of combined star–triangle windings in three-phase electric motors can reduce differential scattering, inductive resistance, additional losses, and electromagnetic noise from higher spatial harmonics of the magnetic field. The employment of combined windings with a doubled number of parallel structures makes it possible to change the number of parallel branches of the winding in a larger range. In practice, the theoretical advantages of combined windings are not always achievable in three-phase electric motors, since conditions of parallel operation should be fulfilled for effective joint operation of the star–triangle windings. Failure to comply with the conditions leads to degraded efficiency of electric motors. The combined windings in three-phase electric motors should be selected based on a refined electromagnetic analysis. An algorithm for calculating combined windings with a serial connection of star–triangle windings is proposed. The refined harmonic analysis of magnetomotive forces, differential scattering, and the distribution of magnetic field induction in the gap confirmed that the influence of higher spatial harmonics is decreased when using combined windings. Due to the enhanced starting torque and the reduced effect of higher spatial harmonics of the magnetic field, direct start of an electric motor with a combined winding occurs faster and with lower speed pulsations during acceleration.</p>","PeriodicalId":39312,"journal":{"name":"Russian Electrical Engineering","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141150065","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

Cooling of Contact Connections of Current Leads of HTS Cables HTS 电缆电流引线触点连接的冷却

Russian Electrical Engineering Pub Date : 2024-05-21 DOI: 10.3103/s1068371224700202

Yu. L. Buyanov

引用次数: 0

Network Voltage Harmonics Generated by an Induction Heater Powered by a Transistor Power Supply 晶体管电源供电的感应加热器产生的网络电压谐波

Russian Electrical Engineering Pub Date : 2024-05-21 DOI: 10.3103/s1068371224700196

V. A. Bukanin, A. N. Ivanov, V. V. Vologdin, Vl. V. Vologdin

{"title":"Network Voltage Harmonics Generated by an Induction Heater Powered by a Transistor Power Supply","authors":"V. A. Bukanin, A. N. Ivanov, V. V. Vologdin, Vl. V. Vologdin","doi":"10.3103/s1068371224700196","DOIUrl":"https://doi.org/10.3103/s1068371224700196","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The problems of electromagnetic compatibility associated with the presence of sinusoidal voltage distortions in a public network when connecting induction heating systems are considered. One of the sources of voltage harmonic emissions is the designed high-frequency induction installation for heating a graphite cylinder based on a VGT 8-50/10 power supply. The problems of low-frequency conducted interference created during the operation of the induction installation for heating the graphite cylinder at high frequencies are considered. Results of experimental studies of the sinusoidal distortion of the voltage curve in the supply network are presented. Measurements are made of the voltage total harmonic distortion factor and the <i>n</i>th harmonic component factor. The voltage and current curves at the input of the VGT-series power supply with a frequency of 10 kHz are obtained when connecting it to an inductor with a power of 12 and 20 kW. Voltage harmonics are measured and compared with the maximum standard parameters. The harmonic numbers at which the permissible voltage values are exceeded are recorded.</p>","PeriodicalId":39312,"journal":{"name":"Russian Electrical Engineering","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141153755","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

Torque Pulsations in Machines with Fractional Slot Windings and Permanent Magnets 带有分数槽绕组和永久磁铁的机器中的扭矩脉动

Russian Electrical Engineering Pub Date : 2024-05-21 DOI: 10.3103/s1068371224700147

D. Yu. Babitsky, D. M. Toporkov, G. O. Heinrich

引用次数: 0

Control Modes of Charger Based on a Half-Bridge Transistor Converter with Dosage Capacitors 基于带剂量电容器的半桥晶体管转换器的充电器控制模式

Russian Electrical Engineering Pub Date : 2024-04-24 DOI: 10.3103/s106837122470007x

A. A. Asabin, V. V. Vanyaev, E. A. Kopelovich, M. M. Troitsky

引用次数: 0

An AC Voltage Stabilizer Based on a Chuk Regulator with a Single-Cycle Control System 基于 Chuk 稳压器和单周期控制系统的交流稳压器

Russian Electrical Engineering Pub Date : 2024-04-24 DOI: 10.3103/s1068371224700068

R. G. Apalkov, M. G. Kiselev, Yu. B. Tserkovskiy

引用次数: 0