Resource-Efficient Technologies最新文献

PROVIDING A MINIMUM DEFECTIVENESS OF INTER-TURN INSULATION AT THE MANUFACTURING STAGE AND DURING THE EXPLOITATION 在制造阶段和开发过程中提供最小的匝间绝缘缺陷

Resource-Efficient Technologies Pub Date : 2022-10-12 DOI: 10.18799/24056529/2022/1/320

A. Leonov, A. Supueva

{"title":"PROVIDING A MINIMUM DEFECTIVENESS OF INTER-TURN INSULATION AT THE MANUFACTURING STAGE AND DURING THE EXPLOITATION","authors":"A. Leonov, A. Supueva","doi":"10.18799/24056529/2022/1/320","DOIUrl":"https://doi.org/10.18799/24056529/2022/1/320","url":null,"abstract":"The reliability of a low-voltage asynchronous electric motor is primarily determined by the reliability of the stator winding insulation. Common reasons for the failure of the insulation system are the unsatisfactory quality of the enameled wires and electrical insulating materials used for imperfection and violation of the technological process of winding and insulating work, and the discrepancy between operating modes. In the vast majority of cases, failures occur due to damage to the inter-turn insulation as the weakest element. This causes the need to study the insulation system resistance to the formation of defects. The results of assessing the stability of the insulation of winding wires to defect formation are obtained, taking into account the features of the operational loads characteristic of frequency-controlled drives with pulse-width modulation of the output voltage and the influence of the inter-turn insulation defectiveness level on its reliability indicators is also studied. The authors have developed the measures to reduce the defectiveness of inter-turn insulation at the manufacturing stage and during operation. This will ensure a minimum level of insulation defects and increase the resource of asynchronous electric motors by reducing the number of failures.","PeriodicalId":21019,"journal":{"name":"Resource-Efficient Technologies","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74281195","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

WAYS TO INCREASE THE EFFICIENCY OF SOLAR PANELS OPERATING IN ISOLATED POWER SUPPLY SYSTEMS 提高隔离供电系统中太阳能电池板运行效率的方法

Resource-Efficient Technologies Pub Date : 2022-08-23 DOI: 10.18799/24056537/2021/4/317

A. S. Sorogin, R. Khamitov

引用次数: 0

SYNTHESIS OF AN AUTOMATED CONTROL SYSTEM FOR THE FLOW OF ACTIVE POWER ALONG A POWER LINE IN OVERLOAD CONDITION 过载情况下电力线路有功潮流自动控制系统的综合

Resource-Efficient Technologies Pub Date : 2022-08-18 DOI: 10.18799/24056537/2021/3/316

K. Postoyankova, V. Polishchuk, A. Shuvalova

{"title":"SYNTHESIS OF AN AUTOMATED CONTROL SYSTEM FOR THE FLOW OF ACTIVE POWER ALONG A POWER LINE IN OVERLOAD CONDITION","authors":"K. Postoyankova, V. Polishchuk, A. Shuvalova","doi":"10.18799/24056537/2021/3/316","DOIUrl":"https://doi.org/10.18799/24056537/2021/3/316","url":null,"abstract":"Currently, there are practically no automated systems for controlling power flow within the specified limits when the power line is overloaded by active power. Regulation is assigned to the dispatchers of the power system or is carried out by means of emergency automation, which disconnects consumers. Therefore, an urgent task is to expand the arsenal of tools for automatic control of active power flow in overload mode. Relevance. A significant increase in electricity consumers leads to a complication of the electric power system. The workload for dispatching personnel is increasing. Maintaining the smooth operation of the elements of the power system is a very important and responsible task. In modern electric power industry, timely warning and elimination of overloads of network elements are relevant. The study aims are development and research of an intelligent automatic control system for the flow of active power along a power line based on the mathematical apparatus of fuzzy logic. The system is based on the use of the regulating effect of the load. Research methodology. Methods of calculating static load model during their actualization were used. The method of fuzzy sets was used in the construction of an intelligence control system for active power flows in overload condition. The effectiveness was estimated by expert methods. Results. The use of artificial intelligence methods for automatic regulation of transformer voltage under load allows up to 5–7 % reducing the flow of active power in overload mode.","PeriodicalId":21019,"journal":{"name":"Resource-Efficient Technologies","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73709740","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

TECHNIQUE OF SETTING UP A PIPELINE VALVE ELECTRIC ACTUATORS CONTROL SYSTEM USING THE EQUIVALENT CIRCUIT PARAMETERS, ESTIMATED BY FALLING CURRENT CURVE 利用等效电路参数，用下降电流曲线估计管道阀门电动执行器控制系统的技术

Resource-Efficient Technologies Pub Date : 2022-05-01 DOI: 10.18799/24056529/2021/2/308

D. Bunkov

{"title":"TECHNIQUE OF SETTING UP A PIPELINE VALVE ELECTRIC ACTUATORS CONTROL SYSTEM USING THE EQUIVALENT CIRCUIT PARAMETERS, ESTIMATED BY FALLING CURRENT CURVE","authors":"D. Bunkov","doi":"10.18799/24056529/2021/2/308","DOIUrl":"https://doi.org/10.18799/24056529/2021/2/308","url":null,"abstract":"To support modern requirements for an induction electric drive of pipeline valves, the most promising is the organization of a filed oriented control system, the setting of which is extremely difficult without the parameters of the equivalent circuit of an induction machine. This article provides a technique of setting a field oriented control system for induction electric drive of pipeline valves based on equivalent circuit parameters, estimated by falling phase current curve. The main aim of the research is to test the functioning of an induction filed oriented electric drive using a load stand, the setting of which is made on the basis of parameters previously estimated by falling phase current curve. Methods. To achieve the goal of the research, theoretical and experimental research methods were used. Theoretical research methods include the theory of electric drive, the theory of automatic control systems, the theory of electrical machines. Experimental research were carried out using a load stand that provides the required level of load on the shaft of the tested induction machine. Results. Suggested the technique of setting a field oriented control system for induction electric drive of pipeline valves based on equivalent circuit parameters, estimated by falling phase current curve. Relative values of deviations of current, speed and torque are obtained at the nominal level of load on the shaft of an induction machine. The applicability of the proposed technique using a loading stand was confirmed.","PeriodicalId":21019,"journal":{"name":"Resource-Efficient Technologies","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76831391","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

ENGINEERING PRACTICE OF SETTING A FIELD ORIENTED CONTROL SYSTEM FOR INDUCTION ELECTRIC DRIVE OF PIPELINE VALVES BASED ON EQUIVALENT CIRCUIT PARAMETERS, ESTIMATED BY FALLING PHASE CURRENT CURVE 基于等效电路参数，用降相电流曲线估算管道阀门感应电驱动磁场定向控制系统的工程实践

Resource-Efficient Technologies Pub Date : 2022-05-01 DOI: 10.18799/24056537/2021/2/308

D. Bunkov

{"title":"ENGINEERING PRACTICE OF SETTING A FIELD ORIENTED CONTROL SYSTEM FOR INDUCTION ELECTRIC DRIVE OF PIPELINE VALVES BASED ON EQUIVALENT CIRCUIT PARAMETERS, ESTIMATED BY FALLING PHASE CURRENT CURVE","authors":"D. Bunkov","doi":"10.18799/24056537/2021/2/308","DOIUrl":"https://doi.org/10.18799/24056537/2021/2/308","url":null,"abstract":"To support modern requirements for an induction electric drive of pipeline valves, the most promising is the organization of a filed oriented control system, the setting of which is extremely difficult without the parameters of the equivalent circuit of an induction machine. This article provides a technique of setting a field oriented control system for induction electric drive of pipeline valves based on equivalent circuit parameters, estimated by falling phase current curve. The main aim of the research is to test the functioning of an induction filed oriented electric drive using a load stand, the setting of which is made on the basis of parameters previously estimated by falling phase current curve. Methods. To achieve the goal of the research, theoretical and experimental research methods were used. Theoretical research methods include the theory of electric drive, the theory of automatic control systems, the theory of electrical machines. Experimental research were carried out using a load stand that provides the required level of load on the shaft of the tested induction machine. Results. Suggested the technique of setting a field oriented control system for induction electric drive of pipeline valves based on equivalent circuit parameters, estimated by falling phase current curve. Relative values of deviations of current, speed and torque are obtained at the nominal level of load on the shaft of an induction machine. The applicability of the proposed technique using a loading stand was confirmed.","PeriodicalId":21019,"journal":{"name":"Resource-Efficient Technologies","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89226834","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

APPLICATION OF HYPERVALENT IODINE COMPOUNDS IN ADVANCED GREEN TECHNOLOGIES (IN PRESS) 高价碘化合物在先进绿色技术中的应用(已出版)

Resource-Efficient Technologies Pub Date : 2021-05-14 DOI: 10.18799/24056537/2021/1/286

V. Zhdankin

引用次数: 1

BIOCHEMICAL EVALUATION AND SCIENTIFIC VALIDATION STUDIES OF AN HERBAL NUTRACEUTICAL (IN PRESS) 一种草药营养品的生化评价和科学验证研究(出版中)

Resource-Efficient Technologies Pub Date : 2021-05-14 DOI: 10.18799/24056537/2021/1/285

S. Manikandaselvi, A. Sudha, V. Vadivel, C. Raj, C. Prabu, P. Brindha

{"title":"BIOCHEMICAL EVALUATION AND SCIENTIFIC VALIDATION STUDIES OF AN HERBAL NUTRACEUTICAL (IN PRESS)","authors":"S. Manikandaselvi, A. Sudha, V. Vadivel, C. Raj, C. Prabu, P. Brindha","doi":"10.18799/24056537/2021/1/285","DOIUrl":"https://doi.org/10.18799/24056537/2021/1/285","url":null,"abstract":"The search for pioneering nutraceuticals from plants is genuine and crucial. Based on the literature review as per Ayurvedic texts, four common plants Capparis spinosa L. (flower buds), Caesalpinia bonducella L.(seeds), Luffa acutangula L.(fruits) and Cassia occidentalis L. (aerial parts) were selected to develop nutraceuticals and were standardized. Based on the nutraceutical and pharmacological efficacies of the individual plant drugs selected, three different herbal nutraceutical formulations were prepared. Nutraceuticals before and after lyophilization were subjected to standardization studies. Nutraceutical formulation 3 developed was found to be best due to its high nutraceutical values when compared to others. Results depicted that up to the dose level of 2000 mg/kg.bw (acute oral toxicity), 1000 mg/kg.bw (sub-acute oral toxicity), it doesn’t produced any lethality in the experimental animals. To conclude that the selected herbal formulation developed from selected plant ingredients was found to possess distinct nutraceutical values. The present work contributes for the development of human healthcare through nutraceutical product with remarkable medicinal properties in herbal way.","PeriodicalId":21019,"journal":{"name":"Resource-Efficient Technologies","volume":"98 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76531234","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

COMPARATIVE MECHANICAL PROPERTIES STUDIES ON HEAT & UNHEAT TREATED AL7075 ALLOY HYBRID COMPOSITES 热处理与未热处理al7075合金混杂复合材料力学性能的比较研究

Resource-Efficient Technologies Pub Date : 2021-05-13 DOI: 10.18799/24056537/2021/1/281

T. Gangadhar, D. Girish

引用次数: 0

CHARACTERISTICS OF ALCOHOL-COAL-WATER SLURRIES SPRAYING 醇水煤浆喷淋特性研究

Resource-Efficient Technologies Pub Date : 2021-01-02 DOI: 10.18799/24056537/2020/4/280

D. Gvozdyakov, V. Gubin, A. Zenkov

{"title":"CHARACTERISTICS OF ALCOHOL-COAL-WATER SLURRIES SPRAYING","authors":"D. Gvozdyakov, V. Gubin, A. Zenkov","doi":"10.18799/24056537/2020/4/280","DOIUrl":"https://doi.org/10.18799/24056537/2020/4/280","url":null,"abstract":"The aim of this work is to substantiate the efficiency of ethyl or isoamyl alcohol application as the third component of coal-water fuels based on the results of experimental study of coaxial spraying. Studies of alcohols influence on spraying characteristics of coal-water fuels can rarely be found in the literature. Instantaneous fields of fuel droplets velocities in several cross-sections of the jet were determined using Particle Image Velocimetry method. Interferometric Particle Imaging method was used to determine droplets distribution by size in the jet of sprayed coal-water fuel. It was experimentally established that substitution of water (no more than 3 % by weight) in the composition of coal-water slurry by fairly typical alcohols leads to decrease in droplet velocities of alcohol-coal-water slurries in comparison with conventional coal-water fuel by 15–18 %. Concentration of sufficiently small fuel droplets (up to 200 microns) increases by 13.4±0.2 % and by 6.6±0.2 % during atomization of alcohol-coal-water slurries with addition of ethyl and isoamyl alcohol, respectively. Introduction of no more than 5 % by weight of the studied alcohols into the coal-water slurry will reduce the cost of fuel by 15–73 % in comparison with fuel oil. Influence of small additives of ethyl and isoamyl alcohol in the composition of coal-water fuel on spraying characteristics proves the possibility of efficient application of such three-component slurries in thermal power engineering. The results obtained are of practical significance, since they illustrate the possibility of reducing the ignition delay time for droplets of alcohol-coal-water slurries after they are sprayed in the furnaces of boiler units.","PeriodicalId":21019,"journal":{"name":"Resource-Efficient Technologies","volume":"74 1","pages":"30-39"},"PeriodicalIF":0.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83985081","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

REVIEW AND EVALUATION OF NANOFLUIDS AS PROSPECT THERMAL ENERGY STORAGE MATERIAL FOR CONCENTRATED SOLAR POWER APPLICATION 纳米流体作为聚光太阳能储能材料的研究进展与评价

Resource-Efficient Technologies Pub Date : 2020-12-29 DOI: 10.18799/24056537/2020/4/277

C. L. Majadas, J. M. Peñaloga, R. Salvador

引用次数: 0