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Proceedings of Intelec 94最新文献

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Development of UPS using new type of circuits 采用新型电路的UPS的开发
Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396585
K. Hirachi, M. Sakane, S. Niwa, T. Matsui
{"title":"Development of UPS using new type of circuits","authors":"K. Hirachi, M. Sakane, S. Niwa, T. Matsui","doi":"10.1109/INTLEC.1994.396585","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396585","url":null,"abstract":"Using a half-bridge converter and a half-bridge inverter respectively in the AC/DC conversion section and the DC/AC conversion section of an uninterruptible power supply (UPS) makes it possible to omit the isolating transformer and render the UPS both more efficient and smaller. But as using such a circuit necessitates storage batteries of very high voltage, it is in particular not suitable as a type of circuit for small-capacity UPSs of the 1 to 3 kVA class. We therefore conceived two techniques in order to lower necessary storage battery voltage: one that uses a bidirectional chopper, and one that uses an auxiliary, inverter. We incorporated these techniques into a 3 kVA UPS and a 1 kVA UPS respectively, allowing us to develop small, high-performance UPSs.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115530611","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: 32
A novel ZVS multi-resonant converter with rectifiers' deadtime control operated in 20 MHz range 一种新型的带整流器死区控制的ZVS多谐振变换器，工作在20mhz范围内
Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396602
T. Hosotani, K. Harada, Y. Ishihara, T. Todaka
{"title":"A novel ZVS multi-resonant converter with rectifiers' deadtime control operated in 20 MHz range","authors":"T. Hosotani, K. Harada, Y. Ishihara, T. Todaka","doi":"10.1109/INTLEC.1994.396602","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396602","url":null,"abstract":"A novel zero-voltage-switched multi-resonant power converter is presented. The rectifier deadtime control proposed in this paper enables this power converter to achieve zero-voltage-switching in any load range and to operate from full load to no load within a high and narrow frequency range. Experimental results of two power converters designed for 2 MHz and 20 MHz operation and analysis are presented.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115807883","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: 5
A review of single phase power factor correction circuits for telecommunication applications 电信用单相功率因数校正电路综述
Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396613
P. Jain, J. Valerio
{"title":"A review of single phase power factor correction circuits for telecommunication applications","authors":"P. Jain, J. Valerio","doi":"10.1109/INTLEC.1994.396613","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396613","url":null,"abstract":"This paper presents a comparative performance of resonant, soft-switched and hard-switched single phase power factor corrected rectifier circuits for telecommunication power supply applications. Three practical rectifiers employing a boost pre-regulator and a resonant, soft-switched and hard-switched DC/DC power converter topologies respectively are built in the laboratory for the same set of requirements. It is shown that the resonant rectifier has higher efficiency than other two rectifiers. All the three rectifiers with forced air cooling are found to have the same size.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126982599","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
A recommendation for centralized powering of local network elements 建议对本地网元进行集中供电
Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396603
N. Dalarsson
{"title":"A recommendation for centralized powering of local network elements","authors":"N. Dalarsson","doi":"10.1109/INTLEC.1994.396603","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396603","url":null,"abstract":"The challenge for the telecommunications power engineer is to devise a cost-effective and reliable means of providing power for telephone sets (POTS) over an evolving local network in a manner that allows a smooth transition to the network envisioned. This paper discusses the networks, reviews proposed powering arrangements, and recommends that centralized powering of network elements, with hybrid arrangements for wideband services, be used wherever possible.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127270597","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: 7
On the low-frequency noise of DC-to-DC converters with random-switching control 带随机开关控制的dc - dc变换器的低频噪声研究
Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396630
T. Tanaka, T. Ninomiya, H. Yoshida
{"title":"On the low-frequency noise of DC-to-DC converters with random-switching control","authors":"T. Tanaka, T. Ninomiya, H. Yoshida","doi":"10.1109/INTLEC.1994.396630","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396630","url":null,"abstract":"The low-frequency output noise that is caused by introducing random-switching control into the DC-to-DC power converter is discussed quantitatively. A modified power converter model involving the unintended effect of random switching is derived from the consideration of noise-generation mechanisms. After a theoretical analysis based on the model, it is clarified that the magnitude of output noise is in proportion to the variance of switching interval. Experimental results from a buck-type power converter are compared with those obtained theoretically, so that the validity of the theoretical results is confirmed.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123547256","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
The central office power plant of the future 未来的中央办公室发电厂
Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396608
H. Kopniwsky
{"title":"The central office power plant of the future","authors":"H. Kopniwsky","doi":"10.1109/INTLEC.1994.396608","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396608","url":null,"abstract":"The author describes an integrated system approach which would create a comprehensive power system that would have the flexibility to serve the power needs of the future central office, with systems to support multimedia and various operational support systems. All requirements for surge immunity, even higher than normal, could be met in a manner where a complete pre-engineered, pre-packaged, pre-constructed system would exist. This would remove the traditional E, F and I tasks from the process thus contributing to predictability, easy of installation, ease of expansion, higher reliability and lower service costs, less debate about how to construct each local site, better customer relations, and a higher quality system that would be verified before leaving the factory.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120990616","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
Analysis and design of EMI filter for multi-output switching mode power supply 多输出开关电源电磁干扰滤波器的分析与设计
Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396629
Zong-Yu He, Fu-Yuan Shih, Yie-Tone Chen, Yan-Pei Wu
{"title":"Analysis and design of EMI filter for multi-output switching mode power supply","authors":"Zong-Yu He, Fu-Yuan Shih, Yie-Tone Chen, Yan-Pei Wu","doi":"10.1109/INTLEC.1994.396629","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396629","url":null,"abstract":"In this paper, a generalized method has been used to discuss the influence of the EMI filter on the stability and the performance of multi-output switching mode power supplies. Criteria for the design of single stage EMI filters are proposed. These criteria satisfy the requirement of specification for EMI and guarantee the system to be stable at the same time. Furthermore, whether there exists a post regulator or a preregulator in the system, or a single output system, the generalized formula of performance derived in this paper always performs well.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115033515","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: 2
New method for measuring the electrical resistivity of a thin layer of earth 测量一薄层大地电阻率的新方法
Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396640
A. Monarque, L. Gastonguay, J. Gagnan, G.Y. Champagne
{"title":"New method for measuring the electrical resistivity of a thin layer of earth","authors":"A. Monarque, L. Gastonguay, J. Gagnan, G.Y. Champagne","doi":"10.1109/INTLEC.1994.396640","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396640","url":null,"abstract":"In order to maintain an adequate safety level in a substation, resistivity of the surface layer must be estimated in situ and during a sufficiently long period of time to take into account the various effects of the climatic conditions. The purpose of the surface layer is to keep the exposure to touch and step voltages to a safe value for a person standing inside or near a substation yard. Conventional techniques are not suitable to achieve resistivity measurements especially for a thin layer of soil. In view of this, a new two-point technique has been proposed which allows semi-continuous measurement of the resistivity of a specific volume of soil. Results have been shown to demonstrate the effect of climatic conditions over the resistivity of a thin surface layer.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115078172","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 novel, low-cost implementation of "democratic" load-current sharing of paralleled converter modules 一种新颖、低成本的并联变换器模块“民主”负载电流共享实现
Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396634
M. Jovanovic, D. E. Crow, Fang-Yi Lieu
{"title":"A novel, low-cost implementation of \"democratic\" load-current sharing of paralleled converter modules","authors":"M. Jovanovic, D. E. Crow, Fang-Yi Lieu","doi":"10.1109/INTLEC.1994.396634","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396634","url":null,"abstract":"A simple, low-cost, and robust \"democratic\" (autonomous) current-sharing circuit is proposed and analyzed. The circuit maintains good current sharing among the modules by properly adjusting the voltage references of the modules based on the differences between the average current of the paralleled modules and the currents of the individual modules. Design guidelines for achieving a desired current-sharing performance are given and verified on a number of DC/DC power converter modules operating in parallel.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132646382","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: 96
Advanced, very reliable power receiving system for telecommunications power plants 先进、可靠的电力接收系统，适用于电信电厂
Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396614
S. Torigoe, K. Nakamura, E. Iino, A. Aotani
{"title":"Advanced, very reliable power receiving system for telecommunications power plants","authors":"S. Torigoe, K. Nakamura, E. Iino, A. Aotani","doi":"10.1109/INTLEC.1994.396614","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396614","url":null,"abstract":"The effective use of microprocessors in power plant systems can provide many benefits, including smaller component size and lighter equipment weight, easier maintainability enhanced economy. Because power receiving systems are ordinarily quite large and complicated, consisting of numerous subsystems, regular maintenance work usually takes a long time. NTT has thus developed an advanced, highly reliable power receiving system which effectively employs microprocessors to reduce maintenance work. This system mainly consists of the following equipment: (1) power receiving panel (PRP); (2) high voltage transfer branch panel (TBP); (3) transformer panel (TRP); (4) low voltage branch panel (LBP); and (5) power system supervision and control equipment (PS SVC). The PRP, TBP, TRP and LBP have achieved downsizing and easier maintainability using microprocessors and a PS SVC was designed to be less than unavailability target value using microprocessors. This paper describes the background of microprocessor application to NTT telecommunication power plant, outlines of this new power receiving system, its operation and maintenance, and how control equipment reliability is designed.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"649 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132125642","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
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