Proceedings of Intelec 94最新文献_第5页

The emergence of multimedia telecommunications and its impact on power architectures 多媒体电信的出现及其对电力体系结构的影响

Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396676

N. Osifchin, J.J. Horzepa

{"title":"The emergence of multimedia telecommunications and its impact on power architectures","authors":"N. Osifchin, J.J. Horzepa","doi":"10.1109/INTLEC.1994.396676","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396676","url":null,"abstract":"The emergence of multimedia communications and its impact on powering architectures are reviewed in three time frames: prior to divestiture of AT&T in 1984; ten years after divestiture; and the next ten years. Competition, spurred by the divestiture together with advances in technology, accelerated the introduction of digital electronics, fiber and wireless to create broadband multimedia communications networks. These networks are increasingly able to provide a panoply of voice, data and image services on demand to any place and any time. To support these networks, power technologists have designed distributed architectures and smaller, lighter, more flexible, higher efficient and lower cost rectifiers, DC/DC converters, DC/AC inverters, and batteries compatible with the new environment. At the same time, network nodes are moving closer to the users, power processing is steadily moving closer to the electronics; into system frames in COs and closer to the users in distributed network elements. The success of distributed network architectures is tightly coupled to the availability of interoperability standards and power management systems that can be integrated into end-to-end multimedia network management systems.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"97 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":"132903575","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

A high efficiency 150 W DC/DC converter 150 瓦高效 DC/DC 转换器

Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396662

Y. Furukawa, K. Morita, T. Yoshikawa

{"title":"A high efficiency 150 W DC/DC converter","authors":"Y. Furukawa, K. Morita, T. Yoshikawa","doi":"10.1109/INTLEC.1994.396662","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396662","url":null,"abstract":"The authors have devised a series resonant circuit, for telecommunication power supplies, in which the charge stored in the parasitic capacitor of the switching device is discharged by the magnetizing current of the transformer in order to reduce loss. In this paper the authors study the details of this new soft switched multi-resonant zero-current-switching converter and report on the modal analysis and the experimental results. They have succeeded in obtaining a high efficiency of 96% in the conversion circuit in an experimental circuit with an input of 15O Voc and an output of 5O Voc at 3A. The features of this circuit are as follows: (i) this is a multi-resonant converter with three resonant operations; (ii) the voltage of the resonant capacitor is charged by the magnetizing inductor of the transformer and the constant voltage regulation is performed by charging the peak value of the resonant current greatly; the lower the switching frequency, the larger the power obtained; (iii) the switching frequency varies little in the whole range from zero to full load; (iv) the voltage in the primary winding of the transformer shall be a half or more of the input voltage; and (v) at turn-on both zero-voltage-switching (ZVS) and zero-current-switching (ZCS) are achieved, and at turn-off only ZVS is achieved.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"34 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":"126961533","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

Current-source parallel-resonant DC/AC inverter with transformer 带变压器的电流源并联谐振DC/AC逆变器

Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396664

M. Kazimierczuk, R. Cravens

引用次数: 61

The positive grid in stationary lead-acid batteries 固定式铅酸电池的正极栅

Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396672

M. E. Fiorino

引用次数: 1

The use of ratiometric measurements to determine battery status 使用比率测量来确定电池状态

Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396623

G. Pedersen

引用次数: 3

An expert management system for VRLA batteries in remote telecommunications centers 远程通信中心VRLA蓄电池专家管理系统

Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396622

J. Poulin, R. Heron, D. Mailloux

引用次数: 7

Analysis and design of single-switch fixed frequency quasi-square-wave zero-current switching converters 单开关定频准方波零电流开关变换器的分析与设计

Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396666

J. Wang, A. Bhat

引用次数: 1

Testing of high gravity flooded batteries for high rate utility applications 高倍率公用事业用高重力浸水电池试验

Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396587

K. A. Murugesamoorthi, R. Landwehrle

引用次数: 0

A deterioration estimating system for 200-Ah sealed lead-acid batteries 一种200ah密封铅酸蓄电池劣化评估系统

Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396646

Y. Kohya, T. Takeda, K. Takano, M. Kohno, K. Yotsumoto, T. Ogata

{"title":"A deterioration estimating system for 200-Ah sealed lead-acid batteries","authors":"Y. Kohya, T. Takeda, K. Takano, M. Kohno, K. Yotsumoto, T. Ogata","doi":"10.1109/INTLEC.1994.396646","DOIUrl":"https://doi.org/10.1109/INTLEC.1994.396646","url":null,"abstract":"The introduction of sealed lead-acid batteries, which do not need refills of water, greatly reduces the amount of maintenance required. However, it is difficult to estimate the battery's deterioration because they are sealed. A useful battery test system for estimating the battery deterioration was developed in NTT and NTT Power and Building Facilities Inc. It can measure the battery's capacity in less than 1 ms without affecting telecommunications equipment or power equipment, is accurate to within 10%, and is compact, light, and easy to handle. In this system, the battery's internal resistance which is calculated from the transient voltage change at the battery's terminal, and current which flows through the circuit, is used to determine the extent of deterioration in the battery. The pulse width of the transient voltage was set to some hundreds microseconds from the mutual relationship between the voltage drop and the battery's capacity. A regression expression was developed using batteries with artificially accelerated deterioration, and a total of 250 sets of 200-Ah sealed lead acid batteries now in use were applied for field experiments. Errors of less than 10% were achieved for every brand of battery. We also verified that neither telecommunications equipment nor power equipment was affected by this measurement.<<ETX>>","PeriodicalId":123164,"journal":{"name":"Proceedings of Intelec 94","volume":"7 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":"122817849","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: 13

Development of a new utility-connected photovoltaic inverter LINE BACK 新型并网光伏逆变器LINE BACK的研制

Proceedings of Intelec 94 Pub Date : 1994-10-30 DOI: 10.1109/INTLEC.1994.396578

M. Yamaguchi, K. Kawarabayashi, T. Takuma, Y. Ueda, Y. Yamano

引用次数: 24