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INTELEC - 1979 International Telecommunications Energy Conference最新文献

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Effect of Semiconductor Devices on the Power Dissipation of Telephone Communications Systems 半导体器件对电话通信系统功耗的影响
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793607
S. Kitsopoulos
{"title":"Effect of Semiconductor Devices on the Power Dissipation of Telephone Communications Systems","authors":"S. Kitsopoulos","doi":"10.1109/INTLEC.1979.4793607","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793607","url":null,"abstract":"Sixty percent of telephone communication equipment power is consumed by the line circuits, 20% by the power supplies and 20% by the common control circuits. In general, line-circuit dissipation is decreasing as more Large Scale Integration (LSI) is introduced, due to special power saving circuits. Powering down under microprocessor control, derating of power devices and use of VMOS will reduce power supply losses. The common control has benefited the most from the LSI explosion. Due to increased cost of energy, low-power technologies (CMOS) are now more cost effective than more conventional ones (NMOS).","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125012477","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
Low Voltage Testing 低压试验
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793604
S. Debardelaben
{"title":"Low Voltage Testing","authors":"S. Debardelaben","doi":"10.1109/INTLEC.1979.4793604","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793604","url":null,"abstract":"The author has been working on improved methods of conducting low voltage testing of electronic telephone switching equipment. The problems with existing techniques are discussed, together with a description of voltage reduction equipment being developed to eliminate these problems.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"205 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130775861","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
Current Transformer Application for Power Switching Transistor Drive 电流互感器在功率开关晶体管驱动中的应用
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793609
B. T. Szpakowski
{"title":"Current Transformer Application for Power Switching Transistor Drive","authors":"B. T. Szpakowski","doi":"10.1109/INTLEC.1979.4793609","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793609","url":null,"abstract":"Current transformers present inherent advantages for driving power switching transistors over alternative driving methods. This paper presents advantages and design problems of current transformer drives in two applications: a) free running push-pull inverter b) switched mode regulator Each application is discussed with respect to: Driver circuit application Design problem analysis of 20 kHz current transformer Performance analysis Northern Telecom uses inverters and P.W.M. converters with current transformer drives designed by the author. They show excellent reliability, performance, and efficiency exceeding 90%.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115935751","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 Saturable Reactor Controlled Ringing Choke Converter 一种可饱和电抗器控制的环形扼流圈变换器
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793642
M. Kohno, E. Miyachika
{"title":"A Saturable Reactor Controlled Ringing Choke Converter","authors":"M. Kohno, E. Miyachika","doi":"10.1109/INTLEC.1979.4793642","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793642","url":null,"abstract":"A ringing choke converter using a single core saturable reactor in the control circuit is described. Besides the few components, simplicity and small size usually found in self-oscillating converters, this converter features a saturable reactor protective functions for overcurrent through the main transistor switch and for magnetic saturation of the power transformer, and good isolation of output from input.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115923686","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
Surge Protection Techniques in Low-Voltage AC Power Systems 低压交流电源系统中的浪涌保护技术
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793608
F. Martzloff
{"title":"Surge Protection Techniques in Low-Voltage AC Power Systems","authors":"F. Martzloff","doi":"10.1109/INTLEC.1979.4793608","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793608","url":null,"abstract":"Designers involved in the ac power side of telecommunications equipment have been justifiably concerned with surge protection because field experience is rich in case histories of failures attributable to transient overvoltages. Insufficient knowledge of the exact nature of these overvoltages, however, has made their task difficult in the past. After several years of data collection by a number of organizations, a more definitive understanding of the surge environment is emerging. The next few years' publications from the IEEE, the IEC, NEMA, and other interested groups will document that understanding. This paper presents an overview of the results of data collection and environment descriptions from the point of view of telecommunications power supply problems, as well as a review of applicable techniques and devices.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116306367","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
Telephone Buildings Energy Conservation 电话楼宇节能
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793648
R. E. Elicker, V. E. Holt
{"title":"Telephone Buildings Energy Conservation","authors":"R. E. Elicker, V. E. Holt","doi":"10.1109/INTLEC.1979.4793648","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793648","url":null,"abstract":"The most cost and energy effective building energy saving measure tried has been Wide Band Temperature Control and Operation with no refrigeration provided when room ambient temperatures are below 80F (27C), and with no heating provided above 65F (18C), on a year around basis. Between these limits, the building is operated in a dynamic or transient mode. In many locales this can eliminate the energy use associated with simultaneous heating and cooling in different building zones, heating in the morning and cooling in the afternoon, short cycling of chillers and fans or furnaces, heating on cool summer days, and operation of refrigeration in mid-winter. Also, humidification and dehumidification loads are reduced. A smaller size environmental control system can be used to handle the reduced loads provided by these wider limits. Initial field trials have shown environmental control system annual energy savings of 30% of the previous year's usage even with override of these wider temperature limits during occupied periods.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116065295","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
The Application of Small Wind Energy Conversion Systems to the Telecommunications Industry 小型风能转换系统在电信行业的应用
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793673
G. Ferrell, William R. Thorn, Mario Agnello, Don Smith
{"title":"The Application of Small Wind Energy Conversion Systems to the Telecommunications Industry","authors":"G. Ferrell, William R. Thorn, Mario Agnello, Don Smith","doi":"10.1109/INTLEC.1979.4793673","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793673","url":null,"abstract":"Wind energy is receiving a great deal of focused attention concerning its technical feasibility, its competitive cost for electric power generation and other applications and its minimal environmental impact. Wind energy technology, both commercially available and cost competitive, has been used extensively to provide electric power in remote areas where access to a central grid is too difficult and costly. For example, to power remote telephone repeaters, Australia has used wind energy as a standard practice since the 1930s. In the United States, several private companies have expressed an interest in using wind energy for powering remote telecommunications stations. With regards to high reliability, particularly the reliability required for the telecommunications industry, the recent testing of wind-electric systems under harsh atmospheric conditions, has proven and documented a high level of required performance. Small wind systems are now capable of remote, unattended, and near maintenance free operation, performance characteristics which are well suited to applications in the telecommunications industry.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116242685","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
Power Supply Chassis using Structural Foam 使用泡沫结构的电源机箱
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793612
E. F. Witt, W. F. Sirocky, W. Wong
{"title":"Power Supply Chassis using Structural Foam","authors":"E. F. Witt, W. F. Sirocky, W. Wong","doi":"10.1109/INTLEC.1979.4793612","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793612","url":null,"abstract":"Structural foam plastic chassis for the power supplies in the Bell System's DIMENSION® PBX sáves over $900,000 each year. This radical design approach saves approximately $60 per power supply because the chassis parts cost less to manufacture, are accurate thus eliminating many assembly problems, integrate details that were previously separate parts, and require no additional finishing for appearance or corrosion protection. The chassis is designed so that the assembly of electrical parts is fast and convenient. This paper addresses the design details of this power supply and others more recently developed which incorporate advanced assembly and component mounting techniques.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127418742","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
Development of Converters in NTT NTT变换器的发展
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793597
Y. Sekino
{"title":"Development of Converters in NTT","authors":"Y. Sekino","doi":"10.1109/INTLEC.1979.4793597","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793597","url":null,"abstract":"This paper discribes power converters used and in the research phase in NTT. Nowadays, almost all converters are semiconductor converters. Since they are efficient, small and reliable, they are used in many telecommunication systems. Recent progress in the telecommunication systems enhances the requirement for further converter development. Studies on converters have been continued to minimize size, obtain high reliability, save energy and reduce cost. Small DC-DC converter, high frequency ferroresonant DC-DC converter and compact PWM inverter, which have been studied, are introduced.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"245 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122298458","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
Characteristics of Gates Cylindrical, Sealed Lead-Acid Cells for Float Applications 浮子用栅极圆柱形密封铅酸电池的特性
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793636
William J. Barcus
{"title":"Characteristics of Gates Cylindrical, Sealed Lead-Acid Cells for Float Applications","authors":"William J. Barcus","doi":"10.1109/INTLEC.1979.4793636","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793636","url":null,"abstract":"Sealed, spirally wound construction utilizing pure lead plates offers significant advantages in lead-acid cell life, safety and discharge characteristics. A starved electrolyte condition and 100% efficient oxygen recombination effectively eliminates water loss for long, maintenance-free float life. Totally absorbed electrolyte and minimal gas venting offer total positional flexibility and improved safety. In close proximity, thin plates of large geometric surface area provide excellent voltage regulation and high discharge current capabilities over a wide temperature range.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129711975","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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