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本篇文章给大家谈谈什么是功率因数,以及什么是功率因数?如何提高功率因数对应的知识点,希望对各位有所帮助,不要忘了收藏本站!

内容导航:
  • 功率因数是什么意思
  • 什么叫功率因数
  • 功率因数是什么意思
  • 什么是功率因数
  • 功率因数是什么意思
  • 什么是功率因数?

Q1:功率因数是什么意思


功率因数是用电设备的有功功率与视在功率的比值,表示用电设备(供电设备、配电设备,等等,均看作广义用电设备)的用电效率。


功率因数的特性:


1、功率因数越大,表示用电效率越高。


2、在任何情况下功率因数都不可能大于1。


3、当交流电路中电压与电流同相位时,有功功率等于视在功率,此时功率因数最大,等于1。


扩展资料


提高功率因数的方法很多,但总的来说可以归结为两大类:


1、提高自然功率因数的方法


(1)正确选用异步电动机的型号与容量。


(2)根据负荷选用相匹配的变压器。电力变压器一次侧功率因数不但与负荷的功率因数有关,而且与负荷率有关。


(3)合理安排和调整工艺流程。合理安排和调整工艺流程, 改善电机设备的运行状态, 限制电焊机和机床电动机的空载运行1 例如可采用空载自动延时断电装置流程等。


(4)异步电动机同步化运行。


2、提高功率因数的补偿方法


采用补偿法来提高功率因数,必须增加新设备、增加有色与黑色金属的需用量。


参考资料:百度百科-功率因数


今日天气详情" target="_blank" onClick="allCount('首页_点击_实况天气_实况天气')"> 9 °

本篇文章给大家谈谈什么是功率因数,以及什么是功率因数?如何提高功率因数对应的知识点,希望对各位有所帮助,不要忘了收藏本站!

内容导航:
  • 功率因数是什么意思
  • 什么叫功率因数
  • 功率因数是什么意思
  • 什么是功率因数
  • 功率因数是什么意思
  • 什么是功率因数?

Q1:功率因数是什么意思


功率因数是用电设备的有功功率与视在功率的比值,表示用电设备(供电设备、配电设备,等等,均看作广义用电设备)的用电效率。


功率因数的特性:


1、功率因数越大,表示用电效率越高。


2、在任何情况下功率因数都不可能大于1。


3、当交流电路中电压与电流同相位时,有功功率等于视在功率,此时功率因数最大,等于1。


扩展资料


提高功率因数的方法很多,但总的来说可以归结为两大类:


1、提高自然功率因数的方法


(1)正确选用异步电动机的型号与容量。


(2)根据负荷选用相匹配的变压器。电力变压器一次侧功率因数不但与负荷的功率因数有关,而且与负荷率有关。


(3)合理安排和调整工艺流程。合理安排和调整工艺流程, 改善电机设备的运行状态, 限制电焊机和机床电动机的空载运行1 例如可采用空载自动延时断电装置流程等。


(4)异步电动机同步化运行。


2、提高功率因数的补偿方法


采用补偿法来提高功率因数,必须增加新设备、增加有色与黑色金属的需用量。


参考资料:百度百科-功率因数


今日天气详情" target="_blank">阴
空气质量18优
未来2小时内无雨~

二十四香谱烧香的含义

    谱烧"Only if all sides bear their due responsibilities, can the peninsula nuclear issue be truly resolved and peace and stability restored to the region

    含义BEIJING -- China hopes that concerned parities can understand and respect the emotions of the people and support normal exchanges between the Democratic People's Republic of Korea (DPRK) and the Republic of Korea (ROK), Foreign Ministry spokesperson Lu Kang said Monday谱烧"All the UN Security Council resolutions that imposed sanctions on the DPRK, including the newly adopted Resolution 2375, have stated clearly that they are not intended to have a negative effect on the livelihoods and humanitarian needs of the people there," Lu said at a daily press briefing

    二十四香谱烧香的含义

    含义"I think this is not only good for China, but will also be a positive influence to the whole international system," he said谱烧For example, Singapore can become a launchpad for Chinese companies to march into international markets, and they can make the best of Singapore's trade and service facilities as a financial center and transport hub含义Singapore's cooperation with China concerning the Belt and Road Initiative, Lee said, is focused on infrastructure inter-connectivity, financial projects and third-country programs such as personnel training, which Singapore believes can combine advantages of both sides谱烧The two sides are expected to exchange views on bilateral ties and issues of common concern, the Chinese Foreign Ministry announced Friday含义In the interview, Lee said the Initiative-related cooperation in sectors such as infrastructure investments, trade and tourism can help further "integrate China into regional and international economic systems while greatly boosting the prosperity and development in other countries

    谱烧The Belt and Road Initiative, put forward by Chinese President Xi Jinping in 2013, is aimed at building the Silk Road Economic Belt and the 21st Century Maritime Silk Road through concerted efforts of all related countries to benefit all participants by promoting unimpeded trade, financial integration, infrastructure inter-connectivity and closer people-to-people exchanges含义The Singaporean leader will pay an official visit to China on Sept 19-21 at the invitation of Chinese Premier Li Keqiang谱烧Before coming to China as an adult, she worked at Soon Chun Hyang University as a teacher

    含义"On the visit to Hefei, I found it was not very developed but thought it would have great potential谱烧To better promote the educational exchanges, Cho and her husband founded the Handa Cultural Exchange Co in Hefei in 2006, with Cho as president含义She herself knew little of the province or its capital at that time, so she decided to have a look before taking her family there谱烧"In the five years since the 18th CPC National Congress in 2012, China has invested more than ever before in poverty relief, and President Xi Jinping has vowed to eliminate poverty by 2020," Cho noted

    She is now helping the development area build a China-South Korea Industry Park, and she has already brought in three South Korean companies to invest in the city's high-tech zoneOfficials should all start from basic positions and get promotions gradually

    二十四香谱烧香的含义

    He has been trying his best to achieve what he has vowed to doI became the first South Korean person to receive the Chinese Central Government's Friendship Award in 2002 and the first from my country to get permanent residency in China in 2006We didn't expect that we would come to love the country as much as we do," said Cho, who speaks fluent MandarinSome of China's practices are also worth learning, such as how it trains its officials

    " What do you feel has been China's biggest achievement over the past five years? What's the most notable change you've observed? China has achieved much in many aspects over the last five yearsOver the last 21 years, South Korean teacher Cho Sung-hye has contributed much to the friendship between the people of her country and ChinaA remarkable South Korean teacher took up residence in Hefei, Anhui province, at the urging of her young son and never looked back"Nowadays all the primary schools in my country have made Chinese-language courses available to students," said Cho, who was believed by some local media to have given the strongest push to the achievement

    It was the first primary school in the country to do so"At the peak, I had 21 relatives living here, and there are still 12 of them now," Cho said

    二十四香谱烧香的含义

    For the last five years, the air has been clearing upWhat do you think China will be like in five years' time? How do you view China's longer-term future? Chinese people's incomes have increased significantly in recent years and they will become richer in the next five years

    " Cho and her husband have also donated hundreds of thousands of yuan to help prevent the children of poverty-stricken rural families in Anhui from dropping out of schoolCho said the number of the poverty-stricken students is declining, and they can now get more financial support from the government, rather than relying on occasional social donationsDo you believe that some of China's experiences or practices could be used to solve pressing global problems? If so, what are they? China has a very mature and comprehensive system to foster leadershipWhat are your expectations for the upcoming 19th National Congress of the Communist Party of China? What are the key issues you care about most? I think China loves peace more than some of the developed countriesIn recent years, I have received numerous awards from the Chinese governmentAnd she has brought even more students from South Korea to China

    By comparing these figures, Pew seems to suggest that China and the US are engaging in a popularity contest in the PhilippinesMeanwhile, two-thirds say having a strong economic relationship with China is more important for ties between the two nations, while only 28 percent say being tough with China on territorial disputes is more vital

    Fully 86 percent have a favorable view of Duterte himself; 78 percent support his handling of the illegal-drugs issue; and 62 percent say that the Philippines government is making progress in its anti-drug campaignThat was certainly not the policy under Obama when he launched the US pivot-to-Asia policy, trying to gang up US allies on China

    And on global economic status, about half of Filipinos (49 percent) say that the US is still the leading economic power, but that is down from 66 percent who said so in 2015But Filipinos also share positive views of China and its leader, President Xi Jinping

    Since becoming Philippines president in June 2016, Rodrigo Duterte has refused to be used by the US to advance its strategyHowever, the Pew survey finds that Duterte and his policies are widely popular at home despite concerns expressed by some governments, in particular the US, over Duterte's clashes with drug cartels and alleged human rights violationsIn 2014, the Philippines was still led by Aquino IIIThis represents a dramatic shift since that question was last asked in 2015

    It clearly suggests that one's gain is another's lossThe Philippines under Duterte has tried to develop an independent foreign policy rather than being a US puppet most of the time

    The US government, lawmakers and pundits have generally expressed negative views of Duterte since he took office last JuneAnd overall, the perception gap between the US and China in the Philippines is narrowing

    According to the survey, 78 percent in the Philippines have a positive view of the US as of this spring, down from 92 percent who expressed positive sentiments in 2015But the Philippines, and indeed all the countries in the region, should be encouraged to have good relations with both China and the US, a real win-win situation for not just the three countries involved, but for the region and the world

    At the same time, 78 percent believe the current economic situation is good, and 57 percent are satisfied with the direction of the country, a 21 percentage-point increase from 2014, the last time this question was asked in the PhilippinesSome even believe that he would not able to serve the full six-year termA zero-sum mentality about China-US relations is reflected not only in the thinking of some US politicians, but also in a new survey conducted by the Pew Research CenterThe report finds that people in the Philippines still like the US and have confidence in its leader, President Donald Trump

    The survey released on Sept 21 bore a title saying people in the Philippines still favor the United States over China, but that the gap is narrowingA quarter now name China as the world's leading economy, up from 14 percent the last time the Philippines was surveyed

    Such an independent policy is dealing a heavy blow to those who still view the relationship between the three countries as zero-sumAnd despite the Philippines being the most pro-Trump nation in Pew's spring 37-country survey, confidence in Trump now is lower than it was in then-President Barack Obama in 2015

    The US was believed to be fully behind the scenes when the Philippines, under President Benigno Aquino III, filed the arbitration suit in 2013 against China in a tribunal in The Hague, a case in which China had refused to participateHis tough rhetoric on the US and softened rhetoric on China, especially compared with his predecessor Aquino III, has worried many in the US

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