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<meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center 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href="http://www.cdcfah.com/cp/third-diyadianqifj_qidongqikb/">起動(dòng)器</a>?淄博科恩軟啟動(dòng)器代理商淄博科恩電氣自動(dòng)化技術(shù)供應(yīng)</p><div id="8cewdur" class="leftbox clearfix"><h1>淄博科恩軟啟動(dòng)器代理商淄博科恩電氣自動(dòng)化技術(shù)供應(yīng)</h1><div id="udac2ub" class="proBig"><div id="3t8ifhy" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/keendianqi/637235132860214844/3104817.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="mldfmoq" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/keendianqi/637235132860214844/3104817.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="yxuroah" 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>淄博科恩軟啟動(dòng)器代理商,科恩軟啟動(dòng)器</p><p><span>***更新：</span>2020-08-19 11:01:04</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="8gasp7p" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">淄博科恩電氣自動(dòng)化技術(shù)有限公司</a></p><p><span>聯(lián)系人：</span>李寧</p><p><span>郵箱: </span>shandongken198@163.com</p><p><span>電話: </span>13371560696</p><p><span>傳真: </span>0533_2855952</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0533-2855952</p><p><span>地址: </span>昌國(guó)西路111號(hào)魯中五金機(jī)電城東區(qū)F-15號(hào)</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="ospmtnz" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="8ikmjqc" class="box"><p><p> 采用矢量控制方式的通用變頻器不僅可在調(diào)速范圍內(nèi)與直流電動(dòng)機(jī)相匹配，而且可以控制異步電動(dòng)機(jī)產(chǎn)生的轉(zhuǎn)矩，淄博科恩軟啟動(dòng)器代理商。轉(zhuǎn)矩控制根據(jù)不同的數(shù)學(xué)算法其功能結(jié)構(gòu)也不相同，如圖所示是一種典型的采用矢量方式實(shí)現(xiàn)的轉(zhuǎn)矩控制功能框圖。先是根據(jù)轉(zhuǎn)矩設(shè)定值計(jì)算出轉(zhuǎn)差頻率，并與變頻器獲得的反饋速度(一般用編碼器PG)或是直接推算的電動(dòng)機(jī)速度相加，在速度限制下輸出同步頻率。很顯然，在轉(zhuǎn)矩控制方式下，速度調(diào)節(jié)器ASR并不起直接作用，也無(wú)法控制速度。轉(zhuǎn)矩控制時(shí)，變頻器的輸出頻率自動(dòng)負(fù)載速度的變化，但輸出頻率的變化受設(shè)定的加速和減速時(shí)間影響，如需要加快的速度，需要將加速和減速時(shí)間設(shè)得短一些。轉(zhuǎn)矩分正向轉(zhuǎn)矩和反向轉(zhuǎn)矩，其設(shè)定可以通過(guò)模擬量端子的電平來(lái)決定，該轉(zhuǎn)矩方向與運(yùn)行指令的方向（即正轉(zhuǎn)和反轉(zhuǎn)）無(wú)關(guān)。當(dāng)模擬量信號(hào)為0～10V時(shí)，為正轉(zhuǎn)矩，淄博科恩軟啟動(dòng)器代理商，即電動(dòng)機(jī)正轉(zhuǎn)方向的轉(zhuǎn)矩指令（從電動(dòng)機(jī)的輸出軸看是逆時(shí)針轉(zhuǎn)）；當(dāng)模擬量信號(hào)為-10～0V時(shí)，淄博科恩軟啟動(dòng)器代理商，為負(fù)轉(zhuǎn)矩，即電動(dòng)機(jī)反轉(zhuǎn)方向的轉(zhuǎn)矩指令（從電動(dòng)機(jī)的輸出軸看是順時(shí)針轉(zhuǎn)）。淄博科恩軟啟動(dòng)器代理商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淄博科恩軟啟動(dòng)器代理商,科恩軟啟動(dòng)器" src="https://tyunfile.71360.com/UploadFile/keendianqi/637235132860214844/3104817.jpg"></div><p style="text-indent:25px">為什么現(xiàn)在的電機(jī)比以前更容易燒毀？由于絕緣技術(shù)的不斷發(fā)展，在電機(jī)的設(shè)計(jì)上既要求增加出力，又要求減小體積，使新型電機(jī)的熱容量越來(lái)越小，過(guò)負(fù)荷能力越來(lái)越弱；再由于生產(chǎn)自動(dòng)化程度的提高，要求電機(jī)經(jīng)常運(yùn)行在頻繁的起動(dòng)、制動(dòng)、正反轉(zhuǎn)以及變負(fù)荷等多種方式，對(duì)電機(jī)保護(hù)裝置提出了更高的要求。另外，電機(jī)的應(yīng)用面更廣，常工作于環(huán)境極為惡劣的場(chǎng)合，如潮濕、高溫、多塵、腐蝕等場(chǎng)合。所有這些，造成了現(xiàn)在的電機(jī)比過(guò)去更容易損壞，尤其是過(guò)載、短路、缺相、掃膛等故障出現(xiàn)頻率比較高。淄博科恩軟啟動(dòng)器銷售廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淄博科恩軟啟動(dòng)器代理商,科恩軟啟動(dòng)器" src="http://tyunfile.71360.com/UpLoadFile/2019/4/13/14/636907616797936241_keendianqi_9000823.jpg"></div><p> 軟啟動(dòng)器的優(yōu)越性能有哪些(1)軟啟動(dòng)器在起動(dòng)過(guò)程中，能控制電機(jī)電壓按線性增加，以使電機(jī)電流也線性增加，因此不會(huì)對(duì)電網(wǎng)造成沖擊，不會(huì)對(duì)配電回路造成更大的電壓降，延長(zhǎng)了電氣設(shè)備的使用壽命。并且電機(jī)起動(dòng)電流，起動(dòng)轉(zhuǎn)矩可調(diào)節(jié)，滿足了生產(chǎn)工藝的要求。(2)軟啟動(dòng)器在起動(dòng)過(guò)程當(dāng)中不受電網(wǎng)電壓波動(dòng)的影響。當(dāng)電網(wǎng)電壓出現(xiàn)波動(dòng)時(shí)，由于軟起動(dòng)器的晶閘管控制電路中引入了電流反饋，使得在整個(gè)起動(dòng)過(guò)程當(dāng)中，通過(guò)控制晶閘管的觸發(fā)角和導(dǎo)通角來(lái)保持起動(dòng)電流的恒定，使電動(dòng)機(jī)平穩(wěn)起動(dòng)，不受配電回路電壓波動(dòng)的影響。(3)應(yīng)用的范圍非常廣。通過(guò)調(diào)節(jié)軟啟動(dòng)器的電壓、電流和時(shí)間參數(shù)，可以滿足不同的起動(dòng)電流、轉(zhuǎn)矩和時(shí)間以及各種停止的要求，時(shí)間電動(dòng)機(jī)的軟起動(dòng)和軟停止。(4)對(duì)于重復(fù)短時(shí)工作制的設(shè)備，電機(jī)長(zhǎng)時(shí)間運(yùn)行在空載和低負(fù)載狀態(tài)下，短時(shí)運(yùn)行于重負(fù)載狀態(tài)下。軟啟動(dòng)器在滿足其他要求的同時(shí)，還有節(jié)能控制環(huán)節(jié)，提高空載和低負(fù)荷時(shí)的功率因素，以達(dá)到節(jié)能目的。(5)一臺(tái)軟啟動(dòng)器可以起動(dòng)多臺(tái)電動(dòng)機(jī)。尤其是對(duì)于外接法只要加上一定的輔助電路，就能實(shí)現(xiàn)用一臺(tái)軟啟動(dòng)器帶動(dòng)多臺(tái)電動(dòng)機(jī)，這樣就的減少了成本?？傊钊氲牧私馍a(chǎn)工藝過(guò)程，了解對(duì)起動(dòng)和停止的要求。 </p><p style="text-indent:25px">就損傷特殊連接的轉(zhuǎn)子馬達(dá)或線路中的變壓器。這種方法的缺點(diǎn)是增加了馬達(dá)費(fèi)用、昂貴的開(kāi)關(guān)裝置、降壓部件、必須的機(jī)械裝置維護(hù)、扭矩階躍變化和起動(dòng)時(shí)產(chǎn)生的加速度。通過(guò)改進(jìn)可控硅整流谷(SCR)而研創(chuàng)的一種減小電壓的起動(dòng)器，它適用于控制油井大功率值。其基本線路使用六個(gè)連接的可控硅整流器作為三個(gè)全控交流開(kāi)關(guān)。每個(gè)電源相和馬達(dá)之間安置一個(gè)開(kāi)關(guān).它是在一個(gè)全橋控制之中限制電流。當(dāng)按圖連接時(shí)，在每個(gè)半循環(huán)期間電路能用改變每個(gè)可控硅整流器接通點(diǎn)來(lái)控制負(fù)載的交流功率，使用正確的時(shí)間信號(hào)把它加到可控硅整流器的整流柵進(jìn)行整流。在每個(gè)半循環(huán)中逐漸變化相后角，能平穩(wěn)增加馬達(dá)的功率通量。當(dāng)按“起動(dòng)”按鈕時(shí)，電流迅速上升到預(yù)置的滿載安培數(shù)值，通常是40%.該數(shù)值剛剛處于馬達(dá)負(fù)載裝置起動(dòng)扭矩之下。從這一點(diǎn)，電流將緩慢地開(kāi)始上升到某些預(yù)置的滿載安培數(shù)值，該數(shù)值保證馬達(dá)在正確的電壓值運(yùn)轉(zhuǎn).時(shí)間間隔可從1s調(diào)到30s.在軟起動(dòng)時(shí)間，電壓和馬達(dá)速度也是緩慢地變化。當(dāng)馬達(dá)電流下降時(shí)，就表示馬達(dá)運(yùn)轉(zhuǎn)正常，此時(shí)起動(dòng)器系統(tǒng)對(duì)電路沒(méi)有較大的形響.若在“軟”起動(dòng)循環(huán)完成之后，馬達(dá)電流超過(guò)預(yù)置數(shù)值115%滿軟安培數(shù)達(dá)4s。該控制器將使用一個(gè)電流減速階躍關(guān)閉設(shè)備。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淄博科恩軟啟動(dòng)器代理商,科恩軟啟動(dòng)器" src="http://tyunfile.71360.com/UpLoadFile/2019/4/13/14/636907616798092101_keendianqi_3627139.jpg"></div><p> 變頻器和軟啟動(dòng)器是兩種完全不同用途的產(chǎn)品。變頻器主要是用于需要電動(dòng)機(jī)調(diào)速的地方，因此也被稱為變頻調(diào)速器，其輸出不但改變電壓而且同時(shí)改變頻率。變頻器具備所有軟啟動(dòng)器和其他啟動(dòng)控制裝置的功能，且啟動(dòng)特性上較之其他電動(dòng)機(jī)啟動(dòng)裝置有比較大的優(yōu)勢(shì).因此完全可以用作電動(dòng)機(jī)的軟啟動(dòng)控制。但之所以目前在電動(dòng)機(jī)的啟動(dòng)控制領(lǐng)城軟啟動(dòng)器仍占據(jù)主要位置.是由于變頻器固有的一些劣勢(shì)，且短期內(nèi)很難克服.只有克服了這些劣勢(shì)之后.變頻器才有可能取代軟啟動(dòng)器。變頻器的特點(diǎn)：(1)啟動(dòng)轉(zhuǎn)矩大，功率因數(shù)高。因?yàn)殡妱?dòng)機(jī)的功率因數(shù)與工作頻率有關(guān)，在電動(dòng)機(jī)低速運(yùn)行時(shí)工頻電源下的功率因數(shù)遠(yuǎn)低于低頻電源下的功率因數(shù)。變頻器可以控制電動(dòng)機(jī)從低頻起步.且在整個(gè)啟動(dòng)過(guò)程中在接近額定電流的條件下始終保持比較高的功率因數(shù)和接近額定轉(zhuǎn)矩的輸出轉(zhuǎn)矩。(2)輕載或空載條件下.或啟動(dòng)期間采取減載卸載等措施時(shí).變頻器容量可以比電動(dòng)機(jī)容量小。當(dāng)然，啟動(dòng)完成后變頻器需要退出運(yùn)行。(3)啟動(dòng)電流小。變頻器一電動(dòng)機(jī)拖動(dòng)系統(tǒng)允許的啟動(dòng)時(shí)間可以很長(zhǎng)。因?yàn)樵谶@期間，電動(dòng)機(jī)電流可以不超過(guò)電動(dòng)機(jī)額定電流，因此，不論是變頻器、電動(dòng)機(jī)還是其他元器件均沒(méi)有超常地發(fā)熱。 </p> <p> <br /> 淄博科恩軟啟動(dòng)器代理商</p><p style="text-indent:25px">淄博科恩軟啟動(dòng)器代理商</p><p> 它的主要構(gòu)成是串接于電源與被控電機(jī)之間的三相反并聯(lián)閘管及其電子控制電路。運(yùn)用不同的方法，控制三相反并聯(lián)閘管的導(dǎo)通角，使被控電機(jī)的輸入電壓按不同的要求而變化，就可實(shí)現(xiàn)不同的功能。變頻器（Variable-frequencyDrive，VFD）是應(yīng)用變頻技術(shù)與微電子技術(shù)，通過(guò)改變電機(jī)工作電源頻率方式來(lái)控制交流電動(dòng)機(jī)的電力控制設(shè)備。變頻器主要由整流（交流變直流）、濾波、逆變（直流變交流）、制動(dòng)單元、驅(qū)動(dòng)單元、檢測(cè)單元微處理單元等組成。變頻器靠?jī)?nèi)部IGBT的開(kāi)斷來(lái)調(diào)整輸出電源的電壓和頻率，根據(jù)電機(jī)的實(shí)際需要來(lái)提供其所需要的電源電壓，進(jìn)而達(dá)到節(jié)能、調(diào)速的目的，另外，變頻器還有很多的保護(hù)功能，如過(guò)流、過(guò)壓、過(guò)載保護(hù)等等。隨著工業(yè)自動(dòng)化程度的不斷提高，變頻器也得到了非常的應(yīng)用。軟啟動(dòng)器和變頻器是兩種完全不同用途的產(chǎn)品。變頻器是用于需要調(diào)速的地方，其輸出不但改變電壓而且同時(shí)改變頻率；軟啟動(dòng)器實(shí)際上是個(gè)調(diào)壓器，用于電機(jī)起動(dòng)時(shí)，輸出只改變電壓并沒(méi)有改變頻率。變頻器具備所有軟起動(dòng)器功能，但它的價(jià)格比軟啟動(dòng)器貴得多，結(jié)構(gòu)也復(fù)雜得多。軟啟動(dòng)器只是改變電源電壓，相當(dāng)于降壓起動(dòng)器。變頻器要比軟啟動(dòng)器復(fù)雜得多，價(jià)格也貴得多。變頻器也有軟啟動(dòng)功能。淄博科恩軟啟動(dòng)器代理商</p><p style="text-indent:25px">淄博科恩電氣自動(dòng)化技術(shù)有限公司屬于電工電氣的高新企業(yè)，技術(shù)力量雄厚。科恩供應(yīng)是一家有限責(zé)任公司企業(yè)，一直貫徹“以人為本，服務(wù)于社會(huì)”的經(jīng)營(yíng)理念;“質(zhì)量高速，誠(chéng)守信譽(yù)，持續(xù)發(fā)展”的質(zhì)量方針。公司始終堅(jiān)持客戶需求***的原則，致力于提供高質(zhì)量的[ "科恩變頻器", "防爆柜", "山東變頻器代理", "電機(jī)智能軟啟動(dòng)器" ]。科恩供應(yīng)順應(yīng)時(shí)代發(fā)展和市場(chǎng)需求，通過(guò)**技術(shù)，力圖保證高規(guī)格高質(zhì)量的[ "科恩變頻器", "防爆柜", "山東變頻器代理", "電機(jī)智能軟啟動(dòng)器" ]。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/966111.html</p></div></div></div></div></div><div id="rg7hjl2" class="page-right twoColRt"><div id="edaxubd" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="cwtq3m3" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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