我国高压变频器行业以30％的速度发展

目前,我国高压变频器行业以30%的速度发展,但由于行业的基数小,市场还没有形成规模,2006年高压变频器行业一年的销售量并不大。但随着近两年我国低压变频器市场逐渐进入稳定阶段,变频器生产企业的市场竞争开始转移向高压变频器     

2009年变频器在冶金行业的应用现状与前景

<正>一变频器在冶金行业的应用现状尽管2009年下半年开始整体经济形势好转,但冶金行业由于产能过剩等因素,导致整体回暖的速度较慢,变频器市场在冶金行业应用市场规模,特别是高压变频器市场规模略有萎缩,低压变频器市场规模基本恢复到金融危机前的水平。低压变频器在冶金行业的应用低压变频器在冶金行业的应用主要是应用于炼钢、连铸、连轧,在炼铁生产线     

春华秋实——英威腾INVT-CHH系列高压变频器研发成功

作为国内变频器行业的知名品牌，深圳市英成腾电气股份有限公司，一直密切关注国内外高压变频嚣的技术发展及高压变频器市场的需求动态，经过半年多的时间，英威腾即研发出了博采众长，集高压变频技术大成的INVT-CHH系列高压变频器。并 于2007年末，一举通过国家电气传动产品     

高压变频器行业新变局

熟悉我国高压变频器行业的人,对2006年、2007年的市场井喷和激烈竞争印象深刻,随着市场的成熟和国家扶持力度的加大,业内人士都认为2008年高压变频器市场将会进入稳定增长的黄金时期.     

变频器行业将维持高速增长

2010年,变频器行业增长速度达到27.27%,主要是中低压变频器去年供不应求,增速达到30%,第一次出现比高压变频器增速高的状况,高压变频器增速为22.7%。高压变频器竞争加剧,价格继续呈下降趋势。经过测算,未来变频器行业将继续维持20%左右的速度高速增长。     

合康：突破大功率变频的几大关键技术

电气时代：随着高压变频器技术和市场的不断成熟,高压变频器已进入高速发展阶段,请您简要介绍我国高压变频器的技术发展现状。     

利德华福:专业服务 满足客户能效需求 访北京利德华福电气技术有限公司CEO徐骏先生

作为国内高压变频器行业的领航企业,利德华福自1998年成立以来,十几年如一日地保持着稳健快速的发展,历经市场竞争、技术革新以及全球宏观经济环境变革的种种考验,成为中国高压变频器市场当之无愧的     

节能需求催生黑马国内高压变频面临五处境

随着节能需求上升为国家发展战略,变频器厂商在市场展开激烈角逐.近些年中国近似空白的高压变频器节能市场开始变得活跃.然而,高压变频器市场早早被有实力的外国品牌觊觎,国产企业难有片刻喘息之机.中国高压变频器市场即将山雨欲来!     

扶持政策出台高压变频上游利好

据悉,在高压变频器中,约有一半的成本来自绝缘栅双极晶体管(IGBT)等电力电子元器件.相比中低压变频器,这类产品的价格与质量对高压变频器而言要重要得多.因此高压变频器厂商对电力电子元器件行业的关注从来没有放松过.2010年,他们发现国家对于电力电子元器件的重视程度也越来越高.     

节能需示催生黑马 国内高压变频面临五处境

随着节能需求上升为国家发展战略，变频器厂商在市场展开激烈角逐。近些年中国近似空白的高压变频器节能市场开始变得活跃。然而，高压变频器市场早早被有实力的外国品牌觊觎，国产企业难有片刻喘息之机。中国高压变频器市场即将山雨欲来!     

Good as new

This work describes the process involved in evaluating whether or not to reuse the generator's original compound excitation system and, if replaced, the type of excitation system that should be installed: compound or potential bus-fed type. It was determined that installing a used steam turbine generator at the plant would be a viable way to reduce manufacturing costs. This work discusses the issues encountered during the evaluation process, the expectations desired, the decisions made, and the outcome achieved as a result of the final decision to replace the existing compound excitation system with a potential bus-fed excitation system.     

Engineers as revolutionaries

It is argued that a technology-driven revolution characterized by an exponentially changing reality is underway. Three categories of problems that result from these changes and cause social stress are discussed. They are: unanticipated consequences; inertial innovation, which is the continuous delivery of ever more sophisticated, higher cost technologies (e.g. defense and medical technology); and problems of deficient commercial innovation, which result from the growing economic importance of international trade to the US and the role of manufactured goods in that trade. In this context engineers are viewed as a revolutionary cadre, and their ability to offer effective answers to these problems is explored     

Software as math

Discrete mathematics and abstract algebra courses are frequently required for computer science and engineering undergraduates. One could say these subjects define the mathematical basis for computing. Unfortunately, interest in the topics discussed in these courses frequently ends with the final exam. This paper presents a reason to continue looking and exploring     

电子产品可靠性设计与制造及试验

随着电子产品在各个领域被广泛运用,如何保证电子产品可靠性成为所有电子产品设计者、制造者关心的话题.提出了如何从多方面提高电子产品系统可靠性的经验和意见,包括产品设计可靠性,元器件可靠性和安装、调试可靠性等.最后介绍了电子产品的可靠性试验.     

GaAs as a semiconductor

The characteristics of semiconductors that make them useful for devices, and the basic principles of the devices are explained. The effect of doping is given particular attention. The properties of GaAs that make it a desirable device material are examined. These are its high electron mobilities, which are essential to high-speed device applications, and its radiation resistance, which makes it a prime material for space and military applications     

Lagging in least-cost planning—Not as far along as we thought

A recent survey of least-cost planning among the states reveals a different and less optimistic view than a prior industry effort. Consequences of the difference are important.     

首季家电市场旺季不旺

~~首季家电市场旺季不旺@严先溥