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含义:变频器

  变频器(Variable-frequency Drive,VFD)是应用变频技术与微电子技术,通过改变电机工作电源频率方式来控制交流电动机的电力控制设备。变频器主要由整流(交流变直流)、滤波、逆变(直流变交流)、制动单元、驱动单元、检测单元微处理单元等组成。变频器靠内部IGBT的开断来调整输出电源的电压和频率,根据电机的实际需要来提供其所需要的电源电压,进而达到节能、调速的目的,另外,变频器还有很多的保护功能,如过流、过压、过载保护等等。随着工业自动化程度的不断提高,变频器也得到了非常广泛的应用。
变频器通常分为4部分:整流单元、高容量电容、逆变器和控制器。
整流单元:将工作频率固定的交流电转换为直流电。
高容量电容:存储转换后的电能。
逆变器:由大功率开关晶体管阵列组成电子开关,将直流电转化成不同频率、宽度、幅度的方波。
控制器:按设定的程序工作,控制输出方波的幅度与脉宽,使叠加为近似正弦波的交流电,驱动交流电动机。
  

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If you need this domain(website), please contact us to purchase it by our contact information.You may refuse to buy domain names, but competitors may not. We will reply soon after receiving your consultation. All replies are valid for 3 days.


△ 网站没有好域名,即使全力推广,也难以让人记住,造成对广告的长期依赖。好域名一看就记住,节省大笔广告费,还能带来大量的流量!

Website does not have a good domain name, even if fully promoted, it is difficult to remember, resulting in long-term dependence on advertising. A good domain name, remember at a glance, can save a lot of advertising costs, but also bring a lot of traffic!


△ 如果说网站是通向世界的门,那么域名就是这个通向世界之门的门牌号。

If a website is viewed as profile to the Internet world, then a domain is simply face of the website.


△如果把互联网比作房地产,那么域名就是口岸和地段。

If Internet is compared as real estate, Then a domain can be compared as a port or location.


△好域名是一种稀缺资源,不仅能带来人气和流量,更能带来商机和财源。

Good domains are always resource of rarity, They brings to you more visitors and traffic, And consequently more business opportunities and revenue.


△域名是一种不可再生资源。如果已经在你手上,就意味着别人不能拥有。

Domains are non-renewable resource. If it already in your hands, it means that others can not have it.


△ 最适合您的域名一般不多,也许仅此一个;错过一时,遗憾一生。

The most suitable domain for you is not enough, Maybe the only one.;Miss it in a moment, regret all life.


△ 注意到本域名,证明了您卓越的眼光,也证明了此域名的价值。

Your notice of this domain name reflects your business sense, As well as value of the domain name.


△行业、品牌、商号域名不在自己手中,意味着失去了互联网上的关键入口。

If the domain of Trade、Brand or trade name is not in your own hands, That means lossing the key entry on the Internet.


△一旦域名落入竞争者之手,就等于要遭受持续的打击。域名正在出售,不要被竞争对手买走,而损失客户。

Once the domain falls into the competitor,  It is tantamount to a sustained blow.Domain is being sold, not to be bought by competitors, and loss of customers.


△顶级域名,自然天成!互联网+时代 你应当拥有一个像样的域名,创建一个顶级网站,跟上互联网+时代的步伐。

Top-level domain, Naturalness! Internet+ times, you should have a excellent domain name, create a top-level site, Stay ahead with Internet+ times step.


△趋势的发展,一直走在时代的前端,要把握住风口,做那只会飞的猪!

The trend of development has been walking in the forefront of the times,we must grasp the outlet,As the fly pig!


△项目未做不必担忧,精品在手,域名能够保值增值。

Do not worry about the project did not to do, boutique in hand, the domain name can preserve and increase value.


△早一天拥有,早一天心安;早一天使用,早一天受益!

As early as the day to own it, as long as a day you to be Calm;As early as the day to use it, as long as a day you to benefit.


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