供电质量和绿色电源

本文阐述了信息社会对高质量供电的需求及其解决方案,同时还就绿色电源产业的形成和绿色电源产品的要求作了简要说明。     

绿色电源设计

ON Semiconductor公司伊尔设计新苑查询号：182GreenLine（绿色线路）、Blue An gel(兰天使)、Energy Star(能量明星)──当今家电行业的关键词是“节能”。全球科技界认为：家庭和办公室中各种装置待机损耗的能量是环境污染的主要来源。像TV接收机、监视器、打印机和VCR这些系统处在待机模式时，问题是“它们能消耗多少能量”？这些家电的能量消耗有两种截然不同的模式：“运行模式”和“等待”或称“待机模式”。在保持同样系统性能的前提下，可以通过降低能量需求来实现运行模式下的节能。电源效率直接影响总系统能量的节省。待机…     

基于LabVIEW的中频电源电能质量分析测试系统设计

为了实现对中频电源系统检测的需求,提出了一种基于LabVIEW的电能质量分析测试系统设计方案,并完成系统的软硬件设计。该系统的硬件部分主要用来采集中频电源系统的电流、电压信号处理为计算机能够识别的弱电信号,软件部分采用LabVIEW进行编程,能够完成对电流、电压信号的计算分析。实际应用表明,该系统具有操作简便、测试准确的特点,达到了对中频电源系统各电量参数进行检测和分析的设计要求。     

金嗓子绿色电源PS-1210和PS-510

对于电源静化器本刊一直比较关注，它是怎么构成的？对提升音质有多大贡献？这也是广大影音爱好者关心的问题。本刊曾对相关产品作过报道，但未能在技术上讲清楚。看了本文之后，相信你会对电源静化器有进一步的了解了。[编者按]     

汇聚电源设计技术 探讨绿色节能趋势——绿色电源与电源管理技术研讨会暨电源技术及产品奖颁奖活动隆重举行

由《电子产品世界》杂志社举办的第十届绿色电源与电源管理技术研讨会5月30日在深圳华强广场酒店举办,会议以探讨绿色电源趋势为主,紧扣降低损耗,提高效率的电源行业发展主题,汇聚了多家行业内主要半导体厂商及测试企业,与到会的专家、广大电源工程师一起共同分享了电源设计的最新技术,探讨如何应对绿色节能趋势的新挑战。     

基于分布式电源接入的电网电能质量分析与控制举措评估

本文首先介绍了电能质量问题的提出和意义,分析了分布式电源对电网电能质量的影响评估,提出了电能质量控制及改善措施,并结合相关实践经验,探讨了在智能微电网框架下电能质量的研究方向,望有助于相关工作的实践。     

分布式电源并网对电能质量的影响分析

当前我国大力发展新能源的背景下,分布式电源并网受到了广泛重视.我国分布式电源并网主要包括光伏发电与风力发电两种类型,此类型发电方式有效推动了环保工程的发展.但是在此过程中人们发现分布式电源并网方式在很大程度上会受到自然条件的限制,导致输出功率具有波动性与随机性,进而对电能质量带来影响,因此探析了分布式电源并网对电能质量...     

用于适配器、LCD电源和台式计算机电源的奇妙绿色芯片

在线座谈(Online Seminar)是中电网于2000年推出的创新服务,通过“视频演示 专家解说 在线问答”三位一体相结合的形式,充分发挥网络平台的便捷性,实现了先进半导体技术提供商与系统设计工程师的实时互动交流,其形式和内容都广受电子行业工程师的好评。本刊每期将挑选一些精华内容整理成文,以飨读者。欲了解更多、更详细的内容,敬请登录http:／／seminar．eccn．com。     

基于电能质量监测的分布式电源优化设计方案

为了实现分布式电源的高效、可靠和安全运行,文中介绍了一种基于电能质量监测的分布式电源自监测逆变器设计。这种自监测逆变器通过对分布式电源工作模式的监测以及输出电能的测量实现对闭环控制器反馈信号的优化,从而实现分布式电源在暂态和稳态上均能够跟随微电网控制中心的控制信号,并输出符合电网规范的电能。实验结果表明,该自监测逆变器能够应用于不同类型的分布式电源,使其在并网模式和孤岛模式下均能够稳定输出电能。     

对我国通信电源设备质量水平的检测和评价

烽火为山西联通本地网扩容烽火通信最近在山西市场又创佳绩,中标山西联通本地网扩容工程,承建运城、临汾、晋中等地市的联通扩容工程,提供2.5GSDH设备十余端和622M、155MSDH百余端。另讯,烽火在山西市场还承建了山西移动骨干网32×2.5G波分工程,共覆盖山西省全省十多个地市,烽火通信为此提供DWDM、GF2488-01B、155/622等设备数百端,占山西移动工程全部投资的80%,该工程分为骨干网、城域网、本地网三部分。     

Power struggle [power supplies for portable equipment]

Gadgets bristling with hardware and applications in smaller packages are forcing designers to consider new power sources. The leading candidate is a form of fuel cell based on methanol as fuel. A methanol based fuel cell produced by Toshiba to power a notebook computer is described in this article.     

微控制器在开关电源中的应用

微控制器作为一种减少元件数量、提高性能的手段,正在高密度开关电源设计中得到应用。     

Intelligent cooperation management of multi-radio access technology towards the green cellular networks for the twenty-twenty information society

An unprecedented increase in subscribers and demand for high-speed data are considered a critical step towards the new era of mobile wireless networks, i.e., Fifth Generation (5G), where the legacy mobile communication system will still be operational for a long time in the future. This has subsequently increased the overall energy consumption, operational costs and carbon footprint of cellular networks, due to increase the number of base stations (BSs), which consume the most energy. Switching BSs off/on in accordance with the traffic pattern variations is considered an effective method for improving energy efficiency. However, the main concerns from the network operators are the requirements to switched on/off the BSs, coverage issues and secured the radio service for the affected area. Hence, the main focus of this study is to develop an intelligent cooperation management (switch BSs on/off) within a multi-radio access technology (RAT) environment between a future generation 5G into the existing LTE and UMTS cellular network towards green cellular networks, while guaranteeing maximum cells coverage area during a switch off session. Particle swarm optimisation has been adopted in this study to maximize the cell coverage area under the constraints of the transmission power of the BS \((P_{tx})\), the total antenna gain (G), the bandwidth (BW), the signal-to-interference-plus-noise ratio (SINR), and shadow fading \((\sigma )\). Moreover, the modulation and coding scheme, the data rate, and the energy efficiency are considered. The results have shown that by applying the proposed a dynamic multi-RAT BSs switching off\(\backslash \)on strategy according to the traffic load variations, the daily energy savings of up to 42.3% can be achieved, with guaranteed maximum cells coverage area.     

He-Ne激光器电源中的过流保护

本文介绍分别由集成电路LM723、LM3524构成的He-Ne激光器电源中的过流保护方法。也介绍一种快速电流检测芯片SG1549的应用。     

和谐社会与信息安全

2005年新春伊始,“和谐社会”这一极具亲和力的温馨词汇迅速“升温”。专家学者纷纷撰文、新闻媒体频频出现……种种迹象显示,“构建社会主义和谐社会”不仅会成为今年贯穿全年的“关键词”,也将引领着中国社会的未来走向。     

中华人民共和国电子行业标准：电子电源术语及定义（六）

为了便于我国电源技术工作者编写技术文件或阅读科技图书刊物，这里刊出下述标准供学习参用。如需引用，请查阅标准原件。     

Packaging and integration technologies for future high-frequency power supplies

This paper reviews data from the International Technology Roadmap for Semiconductors to establish where dc-dc converters are headed in the first decade of the new millennium. It focuses on the high performance computing (high current, fast response, high power density) and portable/handheld (low profile) sectors. Magnetics and power device packaging technologies needed to allow power supplies to move to operating frequencies in the 1-10 MHz region are discussed. It introduces the concept of magnetic components fully embedded (windings and core) in PCB and silicon offering low profile and low losses at high frequency. It also reviews developments in wirebond-free power packaging such as flip-chip assembly that offer low profile, reduced parasitics and increased thermal performance. Finally, consideration is given to the changes in the power electronics industry that may need to be addressed to enable these new technologies to play a strategic role.     

Magnetoresistors for regulation of power supplies and magnetic fields

The use of magnetoresistors, which are being developed in this laboratory for practical uses, such as regulation of power supplies and magnetic fields, is discussed.     

基于断言的验证扩展到片上调试

这种灵活的电源具有4种工业模式和4种医学电源模式，设计者可以将它们串连起来实现150V直流电压，或并联起来实现240A的电流。     

COMSOC's chief information officer-technology serving the society

Previous President's Pages have touched on the wide range of activities conducted by the Communications Society. Many of these activities have evolved over many years, with beginnings even before personal computers and the Internet had become ubiquitous. With the advent of new information technologies, ComSoc realized it had an opportunity to significantly enhance existing services and introduce new services to its members. Achieving this would be no small task, and to provide proper focus on this challenge, the Board of Governors created the volunteer position of Chief Information Officer. This month's column is on the key role the Chief Information Officer (CIO) and the Information Technology (IT) department at ComSoc headquarters play in leveraging Information and Communications Technology (ICT) to keep up with the demands of our members for ever more valuable products and services? or "how to apply Web 2.0 to ComSoc 2.0." ComSoc's