2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)最新文献_第4页

Dual-axis tracked vs. fixed PV: Energetic response of one-year testing period in Romania 双轴跟踪vs固定PV:罗马尼亚一年试验期的能量响应

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231971

B. Burduhos, D. Diaconescu, S. Moraru, M. Badea, C. Grigorescu

{"title":"Dual-axis tracked vs. fixed PV: Energetic response of one-year testing period in Romania","authors":"B. Burduhos, D. Diaconescu, S. Moraru, M. Badea, C. Grigorescu","doi":"10.1109/OPTIM.2012.6231971","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231971","url":null,"abstract":"The purpose of the current paper is to present and analyze the energetic results obtained from a stand-alone photovoltaic system, consisting of two differently orientated PV modules, over a period of one year of functioning. One of the modules is being pseudo-equatorially oriented along two axes based on an annual orientation program which will be described in the paper. The second PV module is installed on a fixed and optimally tilted frame orientated towards South. The paper also describes the electrical and the monitoring system used for measuring the parameters of the electrical energy produced. In the end of the paper a comparative analysis is made regarding the energetic response of the two tested photovoltaic systems in the geographical and meteorological conditions of the Braşov, Romania location during three most relevant day types (sunny, normal and cloudy days). Two main conclusions can be stated: firstly, non-deterministic orientation programs need to be developed, able to adapt themselves to the instantaneous ratio between direct and diffuse solar radiation; and secondly, the resistance of the consumer has the main role in transforming the whole incident solar radiation into electricity or only a part of it resulting in the need of using control systems capable of adapting the consumer resistance to the maximal power of the PV module.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"161 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132400030","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: 6

A new active resonant turn-on snubber 一种新型主动谐振开启缓冲器

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231758

F. Himmelstoss, R. Offner

引用次数: 1

Three-phase squirrel-cage induction motor modal analyses. Theoretical and experimental aspects 三相鼠笼型感应电动机模态分析。理论和实验方面

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231965

I. Roșca, M. Filip, E. Helerea

{"title":"Three-phase squirrel-cage induction motor modal analyses. Theoretical and experimental aspects","authors":"I. Roșca, M. Filip, E. Helerea","doi":"10.1109/OPTIM.2012.6231965","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231965","url":null,"abstract":"The vibrations developed during the work represent one of the main mechanical problems of the electric motors. Their frequencies and levels can cause large damages of different electrical motors parts. This is the reason why even in the design phase it is useful to be known the values of the natural frequencies of the parts. This can be made in two different ways: using modern capabilities of finite element method (FEM) or doing experimental modal analysis. The study developed in the present paper refers to the modal analysis of a three-phase squirrel cage induction of 1.5 kW, for both, for its elements and, for motor and the electric motor as an assembly. The FEM modal analysis was applied using ABAQUS software for assembly of the 7 elements of the motor. The 3D model was developed, mechanical connections being of screw type. The theoretical model was validated by experiments, with impact hammer test method. The validation confirms the assumptions made for the 3D model and the designed model can be use, as example, for other FEM based modal analysis. The natural frequencies obtained both by FEM and experimental method does not overlap on the working frequencies.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126419625","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: 23

An innovative and flexible architecture for industrial automation 一个创新和灵活的工业自动化架构

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231762

A. Gîrbea, C. Suciu, F. Sisak

引用次数: 2

DBD excimer lamp power supply with fully controlled operating conditions DBD准分子灯电源，工作条件完全可控

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231836

D. Florez, R. Díez, K. Hay, H. Piquet

引用次数: 10

Numerical modeling of DC busbar contacts 直流母线触点的数值模拟

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.2298/FUEE1102209P

I. Popa, A. Dolan

引用次数: 9

Analysis of the load sharing characteristics of the series-parallel connected interleaved LLC resonant converter 串并联交错LLC谐振变换器负载分担特性分析

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231845

Gang Yang, P. Dubus, D. Sadarnac

{"title":"Analysis of the load sharing characteristics of the series-parallel connected interleaved LLC resonant converter","authors":"Gang Yang, P. Dubus, D. Sadarnac","doi":"10.1109/OPTIM.2012.6231845","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231845","url":null,"abstract":"Based on the fundamental approximation equivalent circuit of a single cell LLC resonant converter, this paper has developed the equivalent circuit of the interleaved LLC resonant converter, with its primary side connected in series and its secondary side connected in parallel. The load sharing characteristics of the series-parallel connected interleaved LLC converter is then analyzed and a current sharing mathematical model is developed to illustrate the current sharing principles. A case example of a 300/12-18V, 2.5kW, 500kHz interleaved LLC resonant converter is designed and simulated to verify the proposed load sharing model. The established model's error analysis is conducted and the developed model is proved to have relatively high precision in current continuous mode and satisfactory precision in current discontinuous mode. The Monte Carlo analysis is executed to get an overall review of current sharing among different frequencies and the Worst Case analysis is executed to reveal the sensitivity of different influencing factors. The paper provides innovative and valuable references for the dimensioning of series-parallel connected interleaved LLC resonant converters.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"240 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132298658","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: 24

Study of the dynamic stability for small power plants 小型发电厂动态稳定性研究

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231791

C. Kreischer, L. Gołębiowski

引用次数: 0

A few aspects concerning the squirrel cage induction motors efficiency improvement 关于鼠笼式异步电动机效率提高的几个方面

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231913

I. Torac

引用次数: 3

Overcoming the challenges of designing CMOS Software Defined Radio Receivers front-ends embedding analog signal conditioning 克服CMOS软件无线电接收机前端嵌入模拟信号调理设计的挑战

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231983

S. Spiridon, C. Dan, M. Bodea

引用次数: 6