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Application of ASCR in 40-KHz Sine-Wave Converter ASCR在40khz正弦波变换器中的应用
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793610
Z. Chang
{"title":"Application of ASCR in 40-KHz Sine-Wave Converter","authors":"Z. Chang","doi":"10.1109/INTLEC.1979.4793610","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793610","url":null,"abstract":"Efficient bulk power conversion from a 140-volt battery source to 48 volts dc can be accomplished by using ASCR's (Asymmetrical Silicon Controlled Rectifiers) in a 70-kHz series resonant circuit that operates at a repetition rate of 40 kHz. This paper describes a dc-to-dc converter that can deliver 2.5 kilowatts output power with an efficiency greater than 80 percent using a pair of S7310M's connected in the push-push configuration. The magnetic portion of the circuit consists of an input charging choke and an output transformer whose windings are connected such that the induced voltages are additive to provide a high charging voltage to the capacitors in the LC resonant circuits. In addition, this new circuit will prevent the ASCR's from latching on when the extreme output condition of either open or short circuit is present.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"28 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":"122313825","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
An Integrated 60 & 400 Hz UPS for Communications Computers 用于通信计算机的集成60和400 Hz UPS
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793616
Meyer Y. Hoffer
{"title":"An Integrated 60 & 400 Hz UPS for Communications Computers","authors":"Meyer Y. Hoffer","doi":"10.1109/INTLEC.1979.4793616","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793616","url":null,"abstract":"A high efficiency and economical arrangement for providing power to computers with 400 Hz CPU requirements is introduced. The system utilizes a conventional 60 Hz static switching bypass type 60 Hz UPS connected to a common battery with a switching type redundant 400 Hz solid state UPS thus eliminating the double conversion losses and lower efficiency of an added rotary frequency converter. A method is provided for continuity of operation with failure of any major circuit components and means are provided for isolation and maintenance of any component without interrupting the load. The characteristics and circuit techniques of the inverters, rectifiers, and associated static switches are described and photographs of a 150 KVA 60 Hz and 75 KVA 400 Hz integrated systems are presented.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"130 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":"128134579","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
Battery Options for Standby Power 待机电源的电池选项
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793598
B. Halliwell
{"title":"Battery Options for Standby Power","authors":"B. Halliwell","doi":"10.1109/INTLEC.1979.4793598","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793598","url":null,"abstract":"Future trends within the industry are considered, and recent developments in batteries are reviewed, including improved lead acid designs, sodium sulphur and advanced primary batteries. By the very nature of the reliability and long service life requirements, technological change and the introduction of new battery types is a slow process. Apart from certain emergency power systems that require particularly high discharge rates or are exposed to extremes of temperature, the market is almost wholly satisfied by lead-acid batteries of varying design. In reviewing their use, the regional preference for various battery designs is very apparent, with Britain favouring Plante cells for almost all applications, the United States preferring flat plate or more recently the Bell cell, and parts of Europe opting for tubular designs. The important characteristics of these batteries such as the electrical capability in terms of weight, volume and cost, together with the expected service life are compared.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"79 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":"128154632","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
Remote Power Supply for Twin-Tube Coaxial Cable Transmissions System SPC 2700 用于双管同轴电缆传输系统SPC 2700的远程电源
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793646
J. Durand
{"title":"Remote Power Supply for Twin-Tube Coaxial Cable Transmissions System SPC 2700","authors":"J. Durand","doi":"10.1109/INTLEC.1979.4793646","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793646","url":null,"abstract":"CIT-ALCATEL Series SPC 2700 is a twin tube coaxial cable telecommunications system that can support 2700 two-way vf channels or equivalent signals e.g. broadcast TV, up to 12 Mhz wide plus a digital bit stream up to 8448 kbit/S, over a range up to 2500 km (1500mi) between main stations. The repeaters are powered in a series loop with one remote power supply at each end of a power span. This paper describes the remote power feed and the new 300 mA / 1400 V DC-DC converter.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"29 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":"123573571","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
New Design Parameters for Computer Power Distribution 计算机配电的新设计参数
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793619
B. Roberts
{"title":"New Design Parameters for Computer Power Distribution","authors":"B. Roberts","doi":"10.1109/INTLEC.1979.4793619","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793619","url":null,"abstract":"Changing technology in the design of new computer power supplies has prompted a reexamination of how electrical power is distributed in a computer center. Proper electrical isolation between computer loads is becoming more important in total center design. This paper is a discussion of the electrical characteristics of a total computer power distribution system. Current harmonics generated by newer power supplies cannot be properly handled by traditional power distribution design techniques. Proper transformer selection. wire sizing and grounding is presented to show how to achieve optimum system isolation. Comparative results of common mode noise attenuation for different type transformers are presented. The concept of system isolation is presented showing how different levels of electrical isolation can be required to achieve optimum computer system performance.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"19 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":"131101844","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
Specification and Requirements for Uninterruptible Power Systems 不间断电力系统规范和要求
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793615
M. James
{"title":"Specification and Requirements for Uninterruptible Power Systems","authors":"M. James","doi":"10.1109/INTLEC.1979.4793615","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793615","url":null,"abstract":"The specification for large UPS systems is becoming more standard, and this presentation is an attempt to highlight some of the less obvious points. The subjects chosen for discussion are input requirements of voltage, isolation and harmonics, together with considerations of the battery and the output filter. Areas for potential savings in energy and cost are investigated.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"204 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":"114212879","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
Time-Sharing High-Frequency High-Power Thyristor Switching DC-DC Converters with Energy-Storage and-Transfer Reactor Links 具有储能和传输电抗器链路的分时高频大功率晶闸管开关DC-DC变换器
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793645
M. Nakaoka, N. M. Vietson, T. Maruhashi
{"title":"Time-Sharing High-Frequency High-Power Thyristor Switching DC-DC Converters with Energy-Storage and-Transfer Reactor Links","authors":"M. Nakaoka, N. M. Vietson, T. Maruhashi","doi":"10.1109/INTLEC.1979.4793645","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793645","url":null,"abstract":"This paper is mainly concerned with the latest strong technological developments on high-power fast-response switching dc-dc converters controlled by time-sharing/sequencial high-frequency thyristor resonant chopper comprising energy-storage and-transfer reactor assemblies, which can operate over an ultrasonic chopping frequency region in the extent of 20 KHz or more than 20 KHz or so. The possible time-sharing circuit configurations of some thyristorized step-up and-down switching converters relating to new magnetic-power semiconductor combination systems and their unique features are firstly described from a practical point of view and discussed on the basis of power transistor type switching dc-dc convertor. The general procedures of circuit analysis using analytical method and performance evaluations to clarify the operating characteristics and to offer some desirable design data are presented generally. The steady-state open-loop control strategy are elucidated on the basis of the theoretical and experimental results. Furthermore, a new thristorized high-power high-frequency energy-storage step-up switching dc-dc converter using successful time-sharing control technique and load voltage commutation procedures are originally examined and minutely discussed herein.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"56 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":"126709434","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 Battery Plant Designed to Save Energy 为节约能源而设计的电池厂
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793653
J. McAndrews
{"title":"A Battery Plant Designed to Save Energy","authors":"J. McAndrews","doi":"10.1109/INTLEC.1979.4793653","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793653","url":null,"abstract":"This paper will describe a power system configuration that provides improved energy efficiency for telephone power plants. This is accomplished by supplying the plant load with a voltage lower than typically used. The approach will be explained using a standard configuration for a +24 volt (12 cells per string) battery plant. The following points will be emphasized: - Circuitry necessary to maintain the batteries at a regulated 26 volts while supplying a regulated 24 volts to the load; - Control circuitry necessary to detect the need for battery support and initiate the necessary switching; - Switching circuitry necessary to bring the batteries to the load when needed; - Some typical fault modes of operation to show that the system has been designed to be \"fail-safe\".","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"640 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":"131794013","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
Meeting the Storage Energy Needs of the 1980's 满足20世纪80年代的储能需求
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793634
John Schosser
{"title":"Meeting the Storage Energy Needs of the 1980's","authors":"John Schosser","doi":"10.1109/INTLEC.1979.4793634","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793634","url":null,"abstract":"A large capacity, float charged stationary lead acid cell designed to provide maximum electrical performance per square foot of floor space for a given height, superior sealing, minimum maintenance and optimum safety that meets the battery energy requirements for the next decade. Unique design features include a transparent jar that is self-extinguishing, a permanent thermal fusion jar-cover seal, a post seal that effectively stops acid creepage, the option of either lead antimony or lead calcium grids and the ability to handle both short and long duration service or a combination thereof. The introduction of the new cell had to be integrated with the start-up of a new manufacturing plant. This meant that design requirements had to be defined to the extent that production machinery could be ordered 24 months in advance of prototype production. The cell also had to be compatible with three different markets -- utility switchgear, uninterruptible power system and telecommunications -- and be flexible enough to meet future individual requirements of particular customers within each market segment. (For example, those of the Bell System and those of the hundreds of independent telephone companies worldwide.)","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"93 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":"132655744","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
Switch Mode Converter using High-Frequency Magnetic Amplifier 使用高频磁放大器的开关模式变换器
INTELEC - 1979 International Telecommunications Energy Conference Pub Date : 1979-11-01 DOI: 10.1109/INTLEC.1979.4793644
R. Hiramatsu, K. Harada, T. Ninomiya
{"title":"Switch Mode Converter using High-Frequency Magnetic Amplifier","authors":"R. Hiramatsu, K. Harada, T. Ninomiya","doi":"10.1109/INTLEC.1979.4793644","DOIUrl":"https://doi.org/10.1109/INTLEC.1979.4793644","url":null,"abstract":"Multi-output dc-to-dc converters controlled by magnetic amplifiers are presented. In these power converters, the magnetic amplifiers with frequencies of 80 to 400kHz are used instead of the conventional switching transistors. The magnetic amplifier and an additional saturable core suppress the surge occurrence, and consequently these power converters can operate with the relatively low power dissipation and in the high reliability.","PeriodicalId":177302,"journal":{"name":"INTELEC - 1979 International Telecommunications Energy Conference","volume":"19 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":"116168493","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: 12
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