INTELEC '84 - International Telecommunications Energy Conference最新文献_第2页

Batteries in Power Supplies for the New Telecommunication Services 新型电信服务电源中的电池

INTELEC '84 - International Telecommunications Energy Conference Pub Date : 1984-11-01 DOI: 10.1109/INTLEC.1984.4794091

H. Kiehne, H. Krakowski

{"title":"Batteries in Power Supplies for the New Telecommunication Services","authors":"H. Kiehne, H. Krakowski","doi":"10.1109/INTLEC.1984.4794091","DOIUrl":"https://doi.org/10.1109/INTLEC.1984.4794091","url":null,"abstract":"A General survey on battery power supply today and tomorrow within the telecommunication services of the F.R. of Germany. The growing number of new services and modern equipment will be supplied with energy using the existing AC and DC power distribution systems. The principle of permanent power supply demands stored energy either in the fuel tanks of IC (Internal Combustion) Generator sets or in batteries. The network will be extended by optical fibre cables not capable of transporting energy. Computorized equipment requires increasingly continous power supply for memory back up. The three main categories which need stored energy in batteries are: - the central services (as exchanges. repeator stations, a.s.o.) - the subscriber premises (e.g. with optical fibre cables) - the memory backup (in various equipment) For the first category the station battery - central or decentral - will be the solution also in the future. For the decentral power equipment medium and small sizes of rechargeble batteries in maintenance free desing are preferred. Only smaller sizes of rechargeble batteries in maintenancefree design are prefered for the second category. For the third category: energy supply of memory back up's, the design alternative is between primary cells (Lithium) and secondary cells (NiCd button cells). For all types of batteries there is a high demand on reliability during service life and on maintenancefree operation. This requires changes in design of the existing battery types and or newly developed batteries.","PeriodicalId":132848,"journal":{"name":"INTELEC '84 - International Telecommunications Energy Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130674795","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: 4

Design Alternatives for a 500 Ampere 20 Kilohertz Transistor Switch 500安培20千赫兹晶体管开关的设计方案

INTELEC '84 - International Telecommunications Energy Conference Pub Date : 1984-11-01 DOI: 10.1109/INTLEC.1984.4794127

M. Morozowich, R. L. Bonkowski

{"title":"Design Alternatives for a 500 Ampere 20 Kilohertz Transistor Switch","authors":"M. Morozowich, R. L. Bonkowski","doi":"10.1109/INTLEC.1984.4794127","DOIUrl":"https://doi.org/10.1109/INTLEC.1984.4794127","url":null,"abstract":"Low frequency hybrid Darlington modules are commercially available up to 300 amperes and have been proposed at the 500 ampere level. Modules operating at higher frequencies would be appealing in applications such as uninterruptible power supplies (UPS), DC-DC converters, and switching regulators. Analysis of the power losses involved in operation at high current and ultrasonic frequencies shows that substantial switching and conduction losses must be dissipated by a 500 ampere switch. A hypothetical 500 ampere hybrid module operating at 20 kHz is projected and values are estimated for its switching losses and thermal characteristics. Analysis of this hypothetical single side cooled module shows that the heatsink required for operation in a practical industrial ambient is not realizable with available heatsink technology. A practical approach is presented to realize a 500 ampere, 450 volt, 20 kHz switch using a minimum number of paralleled transistors on separate heatsinks. Sample calculations of power losses and thermal performance are presented. Guidelines are presented for selection of transistors to ensure sharing of collector current. Current sharing results are presented for an actual switch, designed according to the guidelines.","PeriodicalId":132848,"journal":{"name":"INTELEC '84 - International Telecommunications Energy Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130488440","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

Communications Equipment Accommodation in Remote Areas 偏远地区的通讯设备住宿

INTELEC '84 - International Telecommunications Energy Conference Pub Date : 1984-11-01 DOI: 10.1109/INTLEC.1984.4794176

A. Wishart

引用次数: 2

System Design for Stand-By Power Supply 待机电源系统设计

INTELEC '84 - International Telecommunications Energy Conference Pub Date : 1984-11-01 DOI: 10.1109/INTLEC.1984.4794121

N. Asano

引用次数: 0

Integrated Power Management Scheme for Telecommunications Systems 电信系统综合电源管理方案

INTELEC '84 - International Telecommunications Energy Conference Pub Date : 1984-11-01 DOI: 10.1109/INTLEC.1984.4794155

J. Coppinger, M. Hutchings, A. Cohen

引用次数: 6

The Convergence of Central Office and Customer Located Power Equipment 中心局与客户定位电力设备的融合

INTELEC '84 - International Telecommunications Energy Conference Pub Date : 1984-11-01 DOI: 10.1109/INTLEC.1984.4794087

I. G. White, R. New

引用次数: 1

Canadian Standards Association Certification Requirements for Telephone Equipment Power Supplies 加拿大标准协会电话设备电源认证要求

INTELEC '84 - International Telecommunications Energy Conference Pub Date : 1984-11-01 DOI: 10.1109/INTLEC.1984.4794124

N. Mancini

{"title":"Canadian Standards Association Certification Requirements for Telephone Equipment Power Supplies","authors":"N. Mancini","doi":"10.1109/INTLEC.1984.4794124","DOIUrl":"https://doi.org/10.1109/INTLEC.1984.4794124","url":null,"abstract":"For electrical equipment to be legally installed in Canada it is generally required that the equipment be Certified by the Canadian Standards Association, which is a non-profit organization devoted to product safety. The following describes some of the certification programmes offered by the Canadian Standards Association, Standards that apply to telephone equipment power supplies, and the construction and test requirements that are contained in those standards. The Canadian Standards Association, (CSA) is a voluntary, non-profit organization dedicated to writing standards and providing certification services. As far as CSA is concerned the use of its Standards is voluntary, in that CSA has no power to enforce adherence to its Standards, It is only when a regulatory body adopts these Standards that they become mandatory. In Canada under the \"British North America Act\" each Province is empowered to pass legislation relating to personal safety. Since electricity, by its nature may be hazardous, it follows that the sale and installation of electrical equipment is under Provincial jurisdiction. To discharge this mandate each Province has adopted CSA Standards by specific reference in Provincial statues. Consequently, it is mandatory that electrical products be Certified by CSA. Products not so certified may be legally installed through a procedure called \"Special Inspection\", the requirements of which vary from province to province. Special Inspection is limited to only a small number of a given product or when there are insufficient Standards.","PeriodicalId":132848,"journal":{"name":"INTELEC '84 - International Telecommunications Energy Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134448756","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

A Novel Couple - But Faithful and Dependable 一对新奇的夫妇——但忠诚可靠

INTELEC '84 - International Telecommunications Energy Conference Pub Date : 1984-11-01 DOI: 10.1109/INTLEC.1984.4794163

M. Grossoni, W. Albiero

引用次数: 0

Microprocessor Controlled Battery Charger 微处理器控制电池充电器

INTELEC '84 - International Telecommunications Energy Conference Pub Date : 1984-11-01 DOI: 10.1109/INTLEC.1984.4794102

James L. Mitchell

{"title":"Microprocessor Controlled Battery Charger","authors":"James L. Mitchell","doi":"10.1109/INTLEC.1984.4794102","DOIUrl":"https://doi.org/10.1109/INTLEC.1984.4794102","url":null,"abstract":"The Microprocessor Controlled Battery Charger enables the user to have more flexibility in control and use of the chargers in the telephone central office. Using the on-board computers in the charger enables the user to have total control of the charger either locally via a key pad or remotely via the telephone. Because operating parameters of the charger can be changed through the key pad, no internal access to change potentiometer settings is needed. This not only makes the task of changing parameters easier, but also adds safety, in that, personnel are not exposed to hazardous voltages. Since a security code is needed to access the routines for changing the parameters, only authorized personnel can make these changes. The advantages of the Microprocessor Controlled Battery Chargers over the conventional charger are many: ¿ Precisely monitor and control charger functions. ¿ Permits on-line updating of operating parameters with no shut down. ¿ Performs diagnostic routines. ¿ Digital display of all operating functions. ¿ Simplifies installation and maintenance. ¿ Improved serviceability. ¿ Increased safety. The Microprocessor Controlled Charger also enchances its use with a \"smart\" plant controller system, since parameters can be changed and monitored including the float and equalize voltage settings without interrupting the operation of the unit.","PeriodicalId":132848,"journal":{"name":"INTELEC '84 - International Telecommunications Energy Conference","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115851378","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

Photovoltaic Electrical Power System for Military Communication Equipment 军用通信设备光伏电力系统

INTELEC '84 - International Telecommunications Energy Conference Pub Date : 1984-11-01 DOI: 10.1109/INTLEC.1984.4794135

S. Cerami, J. Gunn

引用次数: 0