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href="http://www.cdcfah.com/cp/first-_dgdq/">電工電氣</a>?<a href="http://www.cdcfah.com/cp/second-dgdq_diandongjive/">電動(dòng)機(jī)</a>?<a href="http://www.cdcfah.com/cp/third-diandongjive_jsbyddjrv/">機(jī)械設(shè)備用電動(dòng)機(jī)</a>?青海大型高壓電機(jī)廠家排名山東聯(lián)創(chuàng)電機(jī)供應(yīng)</p><div id="e1s16ma" class="leftbox clearfix"><h1>青海大型高壓電機(jī)廠家排名山東聯(lián)創(chuàng)電機(jī)供應(yīng)</h1><div id="qe1hgje" class="proBig"><div id="vtprqp9" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/21/9/637099267969465654_lcdianji_2053770.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="banxw1l" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/21/9/637099267969465654_lcdianji_2053770.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="pc112wj" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>山東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>青海大型高壓電機(jī)廠家排名</p><p><span>***更新：</span>2020-06-22 19:21:09</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="cx6qs61" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">山東聯(lián)創(chuàng)電機(jī)有限公司</a></p><p><span>聯(lián)系人：</span>李道松</p><p><span>郵箱: </span>505920191@qq.com</p><p><span>電話: </span>13906437131</p><p><span>傳真: </span>0533_7781170</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0533-7788099</p><p><span>地址: </span>山東省淄博市臨淄區(qū)朱臺(tái)鎮(zhèn)魏家村</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="e6srflr" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="nwsnt9x" class="box"><p><p> 有些電動(dòng)機(jī)繞組的引線只有三根，不能檢測(cè)繞組間絕緣，重繞電動(dòng)機(jī)的絕緣電阻一般不應(yīng)低于5兆歐。在線: 在電動(dòng)機(jī)運(yùn)行時(shí)，可測(cè)量其三相工作電壓和電流，看是否均衡。電壓應(yīng)基本相等，各相電流與平均值的誤差不應(yīng)超過10%，如用鉗形表測(cè)得的各相電流差值太大，則可能有匝間短路，青海大型高壓電機(jī)廠家排名。有時(shí)需要脫開負(fù)載測(cè)量空載電流大小，一般2極約2800rpm，1/3 Ie（額定電流）；4極約1600rpm，40%左右 Ie；6極約900rpm，青海大型高壓電機(jī)廠家排名，55% Ie。它會(huì)因極數(shù)與容量的不同而不同。另外電動(dòng)機(jī)的Y、△形接法不能搞錯(cuò)，若錯(cuò)將Y形接成△形，工作電流會(huì)增大；反之，則減小。同時(shí)，如電動(dòng)機(jī)的繞組接線錯(cuò)誤，或繞組匝數(shù)減少，舊電動(dòng)機(jī)的定轉(zhuǎn)子間氣隙過大(正常0，青海大型高壓電機(jī)廠家排名.2-1.0mm)都會(huì)使空載電流加大，這些要點(diǎn)可以幫助我們判斷日常運(yùn)行電動(dòng)機(jī)狀況的好壞。 </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海大型高壓電機(jī)廠家排名" src="http://tyunfile.71360.com/UpLoadFile/2019/11/21/9/637099267969465654_lcdianji_2053770.jpg"></div><p> 同步電機(jī)，和感應(yīng)電機(jī)（即異步電機(jī)）一樣是一種常用的交流電機(jī)。同步電機(jī)是電力系統(tǒng)的心臟，它是一種集旋轉(zhuǎn)與靜止、電磁變化與機(jī)械運(yùn)動(dòng)于一體，實(shí)現(xiàn)電能與機(jī)械能變換的元件，其動(dòng)態(tài)性能十分復(fù)雜，而且其動(dòng)態(tài)性能又對(duì)全電力系統(tǒng)的動(dòng)態(tài)性能有極大影響。特點(diǎn)是：穩(wěn)態(tài)運(yùn)行時(shí)，轉(zhuǎn)子的轉(zhuǎn)速和電網(wǎng)頻率之間有不變的關(guān)系n=ns=60f/p，其中f為電網(wǎng)頻率，p為電機(jī)的極對(duì)數(shù)，ns稱為同步轉(zhuǎn)速。若電網(wǎng)的頻率不變，則穩(wěn)態(tài)時(shí)同步電機(jī)的轉(zhuǎn)速恒為常數(shù)而與負(fù)載的大小無關(guān)。同步電機(jī)分為同步發(fā)電機(jī)和同步電動(dòng)機(jī)。現(xiàn)代發(fā)電廠中的交流機(jī)以同步發(fā)電機(jī)為主。 </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海大型高壓電機(jī)廠家排名" src="http://tyunfile.71360.com/UpLoadFile/2019/11/21/9/637099267873748132_lcdianji_9430804.jpg"></div><p> 三相異步電動(dòng)機(jī)的缺相運(yùn)行是指三相供電電源缺少一相或三相繞組有一相從電源斷開而造成的一種電動(dòng)機(jī)運(yùn)行狀態(tài)，三相異步電動(dòng)機(jī)的繞組燒毀大多數(shù)是由于缺相運(yùn)行造成的。下面，我介紹一個(gè)簡(jiǎn)便方法針對(duì)缺相故障進(jìn)行保護(hù)。一、對(duì)于星形接法電動(dòng)機(jī)，由于三相交流電的失量和為零，其中性點(diǎn)對(duì)地電壓理論上為零，但實(shí)際上三相電壓不會(huì)平衡，總要相差幾伏電壓。當(dāng)電機(jī)缺相運(yùn)行時(shí)，由于定子三相電壓不平衡，中性點(diǎn)對(duì)地的零序電壓升高，當(dāng)電機(jī)滿負(fù)荷運(yùn)行時(shí)，此零序電壓可達(dá)達(dá)25～45伏。此時(shí)，可通過串接于電機(jī)中性線上的零序電壓繼電器來對(duì)電機(jī)進(jìn)行保護(hù)，如圖1所示。電機(jī)正常運(yùn)行時(shí)，中性點(diǎn)對(duì)地電壓較低，Kv不動(dòng)作。，中性蘭對(duì)地電壓升高，使Kv動(dòng)作，它的常閉觸點(diǎn)斷開而切斷KM線圈電源，隨即主電路斷電。二、對(duì)于定子繞組三角形接法的電機(jī)，可將星形接法的三只電容器(容量2～4uF為好)接于三角形繞組上，引出人為中性點(diǎn)，如圖2所示。由于實(shí)際電路中，中性點(diǎn)對(duì)地總有幾伏電壓，因此可以把電壓繼電器整定到12～24伏。此外也可使用市場(chǎng)上的小型中間繼電器(12或24伏)來代替電壓繼電器。這樣更方便些。 </p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/353589.html</p></div></div></div></div></div><div id="xojlv44" class="page-right twoColRt"><div id="nid9hcf" class="box01 margin10 clearfix"><h3><a 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