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Inverters for utility interactive photovoltaic power plants 公用事业互动光伏电站逆变器
Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering', Pub Date : 1989-04-11 DOI: 10.1109/MELCON.1989.49972
E.T. Schonholzer
{"title":"Inverters for utility interactive photovoltaic power plants","authors":"E.T. Schonholzer","doi":"10.1109/MELCON.1989.49972","DOIUrl":"https://doi.org/10.1109/MELCON.1989.49972","url":null,"abstract":"An introduction to the more important inverter circuits for photovoltaic (PV) plants is presented. Their relative merits and drawbacks are examined, with particular emphasis on power quality, reliability, and efficiency. It is concluded that transistor circuits will probably conquer the small power field, whereas high-power converters will use thyristors and GTOs.<<ETX>>","PeriodicalId":380214,"journal":{"name":"Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering',","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115230404","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: 8
Self-tuning control for SCR motor drive 可控硅电机驱动自整定控制
Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering', Pub Date : 1989-04-11 DOI: 10.1109/MELCON.1989.50008
M. Milanović, K. Jezernik, A. Planinc, M. Globevnik
{"title":"Self-tuning control for SCR motor drive","authors":"M. Milanović, K. Jezernik, A. Planinc, M. Globevnik","doi":"10.1109/MELCON.1989.50008","DOIUrl":"https://doi.org/10.1109/MELCON.1989.50008","url":null,"abstract":"The authors describe cascade self-tuning DC motor current and speed controllers. They assume a DC motor to be a plant with unknown but constant parameters. On the basis of the estimated plant parameters, they design a controller and then realize the control loop. Plant parameters are estimated on the basis of manipulation of mean values of armature voltage, armature current, and angular speed. Simulation results confirm the effectiveness of the proposed method when combined with controller synthesis by pole assignment. Linearization of the thyristor static characteristic led to an improvement in control.<<ETX>>","PeriodicalId":380214,"journal":{"name":"Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering',","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114170844","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
SOS-a network for emergency communications sos -紧急通信网络
Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering', Pub Date : 1989-04-11 DOI: 10.1109/MELCON.1989.50067
C. Sa da Costa, T. Rocha da Silva, M. Nunes
{"title":"SOS-a network for emergency communications","authors":"C. Sa da Costa, T. Rocha da Silva, M. Nunes","doi":"10.1109/MELCON.1989.50067","DOIUrl":"https://doi.org/10.1109/MELCON.1989.50067","url":null,"abstract":"The development of a network for emergency calls for highways of up to several hundred kilometers is discussed. The system has a bus structure allowing digital transmission of voice and data at low speed and with enough quality for this kind of application. The overall architecture and the operational features of this network are described. Particular attention is given to voice encoding, the communication protocol, and the message structure.<<ETX>>","PeriodicalId":380214,"journal":{"name":"Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering',","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114313467","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
Acoustic-phonetic module for continuous Slovene speech recognition 用于连续斯洛文尼亚语语音识别的声学-语音模块
Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering', Pub Date : 1989-04-11 DOI: 10.1109/MELCON.1989.50029
F. Mihelic, L. Gyergyek, N. Pavesic
{"title":"Acoustic-phonetic module for continuous Slovene speech recognition","authors":"F. Mihelic, L. Gyergyek, N. Pavesic","doi":"10.1109/MELCON.1989.50029","DOIUrl":"https://doi.org/10.1109/MELCON.1989.50029","url":null,"abstract":"The authors present a possible configuration of an acoustic-phonetic module for Slovene speech recognition. They tested several feature sets, deriving the orthogonal transformation of the log energies of the short bandpass spectra components and loudness. Segmentation is done on the basis of the reference values of the phone components and fundamental phonetic knowledge of the statistical properties of phones, phone duration times, and certain other phonetic rules of the Slovene language, which are useful in the segment classification process. The module was tested on speech data consisting of 44 simple Slovene sentences. The results of testing and plans for the future development are presented.<<ETX>>","PeriodicalId":380214,"journal":{"name":"Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering',","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116284467","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: 3
A design-based approach to data communications education 基于设计的数据通信教育方法
Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering', Pub Date : 1989-04-11 DOI: 10.1109/MELCON.1989.50149
N. Black, M. Lydon
{"title":"A design-based approach to data communications education","authors":"N. Black, M. Lydon","doi":"10.1109/MELCON.1989.50149","DOIUrl":"https://doi.org/10.1109/MELCON.1989.50149","url":null,"abstract":"A major design-based assignment has been developed as a vehicle for enhancing a student's appreciation of practical data communication networks. This assignment has been incorporated into the final year of an information systems syllabus in the final year of an undergraduate honors degree. The students are required to design a data communication system on the basis of a fictitious but realistic company specification and to present their designs formally to a panel of academic and industrial experts. The feedback both from the students and from industry has indicated that such an approach to the teaching of data communications is beneficial from an educational standpoint and is favorably received by prospective employers.<<ETX>>","PeriodicalId":380214,"journal":{"name":"Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering',","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115360049","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
Model library for power MOSFETS in switching circuits and converters 开关电路和变换器中功率mosfet的模型库
Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering', Pub Date : 1989-04-11 DOI: 10.1109/MELCON.1989.49998
R. Maimouni, D. Allain, M. Napieralska, H. Tranduc, P. Rossel, C. Cordonnier
{"title":"Model library for power MOSFETS in switching circuits and converters","authors":"R. Maimouni, D. Allain, M. Napieralska, H. Tranduc, P. Rossel, C. Cordonnier","doi":"10.1109/MELCON.1989.49998","DOIUrl":"https://doi.org/10.1109/MELCON.1989.49998","url":null,"abstract":"Macromodels for the power VDMOS transistor are proposed in order to simulate its switching characteristics. These macromodels use the SPICE model library and are established for low voltage (60 V) as well as high voltage (1000 V) devices. Three VDMOS power transistor models have been proposed for the simulation of switching circuits. These have been validated by simulation of some energy conversion systems. One of the proposed models takes into account the effect of temperature on the variations of the device parameters.<<ETX>>","PeriodicalId":380214,"journal":{"name":"Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering',","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123171931","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
a-Si versus c-Si material and solar cells similarities and differences a-Si与c-Si材料与太阳能电池的异同
Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering', Pub Date : 1989-04-11 DOI: 10.1109/MELCON.1989.49996
J. Furlan, S. Amon, F. Smole, D. Sencar
{"title":"a-Si versus c-Si material and solar cells similarities and differences","authors":"J. Furlan, S. Amon, F. Smole, D. Sencar","doi":"10.1109/MELCON.1989.49996","DOIUrl":"https://doi.org/10.1109/MELCON.1989.49996","url":null,"abstract":"It is shown that the design considerations for c-Si (crystalline silicon) solar cells greatly differ from those for a-Si (amorphous silicon) cells. Due to inherent atomic disorder, the a-Si material has a large and continuous distribution of gap states having a profound effect on the internal physical properties of a-Si material and on the resulting electrical properties of solar cell terminals. The design rules utilized in designing efficient c-Si cells cannot be used for optimization of the internal structures of a-Si solar cells, and conversely, the design considerations for a-Si cells do not apply to c-Si solar cell structures.<<ETX>>","PeriodicalId":380214,"journal":{"name":"Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering',","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124481529","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
Recent development in optically generated slow wave phenomena 光产生慢波现象的最新进展
Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering', Pub Date : 1989-04-11 DOI: 10.1109/MELCON.1989.50140
T. Itoh
{"title":"Recent development in optically generated slow wave phenomena","authors":"T. Itoh","doi":"10.1109/MELCON.1989.50140","DOIUrl":"https://doi.org/10.1109/MELCON.1989.50140","url":null,"abstract":"The author reviews guided wave phenomena in a transmission line on a heterostructure semiconductor in which slow wave propagation is generated by optical illumination. The device consists of a heterostructure in which a GaAs layer is sandwiched by GaAlAs layers. A typical planar transmission line such as a coplanar waveguide is formed on the top surface. Experimental results are given. The measurement was done at illumination intensities of 3.2 mW/cm/sup 2/, 32.0 mW/cm/sup 2/, and 63.7 mW/cm/sup 2/. A maximum relative phase shift of 60 degrees at 9.5 GHz was observed for an illumination of 3.2 mW/cm/sup 2/. The present work is directed toward the development of an optically controlled phase shifter in a form compatible with monolithic microwave integrated circuit techniques.<<ETX>>","PeriodicalId":380214,"journal":{"name":"Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering',","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124690700","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
Fast PN sequence correlation by using FWT 基于FWT的快速PN序列相关
Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering', Pub Date : 1989-04-11 DOI: 10.1109/MELCON.1989.50094
S.Z. Budisin
{"title":"Fast PN sequence correlation by using FWT","authors":"S.Z. Budisin","doi":"10.1109/MELCON.1989.50094","DOIUrl":"https://doi.org/10.1109/MELCON.1989.50094","url":null,"abstract":"A simple relation between Walsh functions and PN (pseudonoise) sequences is derived. It is shown that by using a suitable permutation a set of discrete Walsh functions-sequences can be transformed into the set of different phase shifts of a single PN sequence. A matched filter-correlator based on the fast Walsh transform (FWT) which exploits this property is proposed. This correlator can be efficiently applied to continuous wave radar signal compression and direct-sequence spread-spectrum code acquisition. This method is shown to be much more efficient than the method based on the FFT (fast Fourier transform), which includes two FFTs and an array multiplication. As opposed to the FFT-based algorithm, the proposed method has no multiplications and the total number of operations is approximately five times smaller. As the number of operations per input samples is small, the proposed algorithm is adequate for LSI implementation even for high bit rates and for long sequences.<<ETX>>","PeriodicalId":380214,"journal":{"name":"Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering',","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124907731","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: 14
A general purpose VLSI median filter and its applications for image processing 通用VLSI中值滤波器及其在图像处理中的应用
Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering', Pub Date : 1989-04-11 DOI: 10.1109/MELCON.1989.50057
M. Karaman, L. Onural, A. Atalar
{"title":"A general purpose VLSI median filter and its applications for image processing","authors":"M. Karaman, L. Onural, A. Atalar","doi":"10.1109/MELCON.1989.50057","DOIUrl":"https://doi.org/10.1109/MELCON.1989.50057","url":null,"abstract":"A general purpose median filter configuration consisting of two single chip median filters is proposed. One of the chips is designed for applications requiring variable word-length and variable window size, whereas the other is for real-time applications. The architectures of the chips are based on odd/even transposition sorting. The chips are implemented in 3- mu m M/sup 2/CMOS using full-custom VLSI design techniques. The chips together with a reasonable external hardware can be used for the realizations of many median filtering techniques. The VLSI design procedure of the chips and their applications to different median filtering techniques for image processing are presented.<<ETX>>","PeriodicalId":380214,"journal":{"name":"Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering',","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125145793","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
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