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href="http://www.cdcfah.com/cp/third-diyadianqifj_qidongqikb/">起動器</a>?淄博科恩軟啟動器廠家淄博科恩電氣自動化技術供應</p><div id="8vhztax" class="leftbox clearfix"><h1>淄博科恩軟啟動器廠家淄博科恩電氣自動化技術供應</h1><div id="wg3vhzw" class="proBig"><div id="8zby3m7" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/4/12/14/636906757443826248_keendianqi_9094734.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="vt7yfro" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/4/12/14/636906757443826248_keendianqi_9094734.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="dcelvsk" class="content"><p><span>需求數量：</span>0</p><p><span>價格要求：</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>產品關鍵詞：</span>淄博科恩軟啟動器廠家,科恩軟啟動器</p><p><span>***更新：</span>2020-08-24 16:01:31</p><p><span id="click" >瀏覽次數：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="lank8xw" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">淄博科恩電氣自動化技術有限公司</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>網址: </span></p><p><span>手機: </span>0533-2855952</p><p><span>地址: </span>昌國西路111號魯中五金機電城東區(qū)F-15號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="dsuwlhj" class="page-proshow02"><p class="title">詳細說明</p><div id="xhebi2o" class="box"><p><p> 它的主要構成是串接于電源與被控電機之間的三相反并聯(lián)閘管及其電子控制電路。運用不同的方法，控制三相反并聯(lián)閘管的導通角，使被控電機的輸入電壓按不同的要求而變化，就可實現(xiàn)不同的功能。變頻器（Variable-frequencyDrive，VFD）是應用變頻技術與微電子技術，通過改變電機工作電源頻率方式來控制交流電動機的電力控制設備。變頻器主要由整流（交流變直流）、濾波、逆變（直流變交流）、制動單元、驅動單元、檢測單元微處理單元等組成。變頻器靠內部IGBT的開斷來調整輸出電源的電壓和頻率，根據電機的實際需要來提供其所需要的電源電壓，進而達到節(jié)能、調速的目的，另外，變頻器還有很多的保護功能，如過流、過壓、過載保護等等。隨著工業(yè)自動化程度的不斷提高，變頻器也得到了非常的應用。軟啟動器和變頻器是兩種完全不同用途的產品。變頻器是用于需要調速的地方，其輸出不但改變電壓而且同時改變頻率；軟啟動器實際上是個調壓器，用于電機起動時，輸出只改變電壓并沒有改變頻率。變頻器具備所有軟起動器功能，但它的價格比軟啟動器貴得多，淄博科恩軟啟動器廠家，結構也復雜得多。軟啟動器只是改變電源電壓，相當于降壓起動器，淄博科恩軟啟動器廠家。變頻器要比軟啟動器復雜得多，淄博科恩軟啟動器廠家，價格也貴得多。變頻器也有軟啟動功能。淄博科恩軟啟動器廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淄博科恩軟啟動器廠家,科恩軟啟動器" src="http://tyunfile.71360.com/UpLoadFile/2019/4/12/14/636906757443826248_keendianqi_9094734.jpg"></div><p> 過載保護功能。一般電機的過載保護是通過熱元件來實現(xiàn)的，熱元件在電動機的啟動瞬間過電流而產生誤<span style="font-size:12px;">動作。為避免誤動，用戶常加大熱元件的設定電流，因而使得過載保護的靈敏度不夠，使過載保護形同虛設。</span><span style="font-size:12px;">而軟啟動器內置的過載保護功能是根據啟動負荷的輕重（即啟動時間的長短）來選擇不同的脫扣特性曲線，以</span><span style="font-size:12px;">避免突然啟動過程中誤跳。由于它的過載保護是可編程的，從而為用戶提供了更大的靈活性。選用帶內置過載</span><span style="font-size:12px;">保護功能的軟啟動器還可以省去熱繼電器，使控制柜內布線簡單。</span> 淄博科恩軟啟動器廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淄博科恩軟啟動器廠家,科恩軟啟動器" src="https://tyunfile.71360.com/UploadFile/keendianqi/637235132860214844/3104817.jpg"></div><p> 晶閘管導通條件為：加正向電壓且門極有觸發(fā)電流;其派生器件有：快速晶閘管，雙向晶閘管，逆導晶閘管，光控晶閘管等。它是一種大功率開關型半導體器件，在電路中用文字符號為“V”、“VT表示。晶閘管在工作過程中，它的陽極(A)和陰極(K)與電源和負載連接，組成晶閘管的主電路，晶閘管的門極G和陰極K與控制晶閘管的裝置連接，組成晶閘管的控制電路。高壓晶閘管軟啟動器為半控型電力電子器件，它的工作條件如下：1.晶閘管承受反向陽極電壓時，不管門極承受何種電壓，晶閘管都處于反向阻斷狀態(tài)。2.晶閘管承受正向陽極電壓時，*在門極承受正向電壓的情況下晶閘管才導通。這時晶閘管處于正向導通狀態(tài)，這就是晶閘管的閘流特性，即可控特性。3.晶閘管在導通情況下，只要有一定的正向陽極電壓，不論門極電壓如何，晶閘管保持導通，即晶閘管導通后，門極失去作用。門極只起觸發(fā)作用。4.晶閘管在導通情況下，當主回路電壓(或電流)減小到接近于零時，晶閘管關斷。 </p><p> 從長期來看：變頻軟起將會成為軟起動器（西馳分級變頻軟起動器）的主流。各種形式的降壓軟起動將與星三角起動等技術一起歸并為傳統(tǒng)的起動技術。隨著變頻器價格的逐漸下降，可靠性的進一步提高，也隨著技術人員水平的提高，**為軟起動而選用變頻器將不再會被人們認為是一種。變頻軟起動勝出的根本原因是：它可以在限流（起動電流不超過電機額定電流值）的同時獲得大的起動轉矩，可以實現(xiàn)包括軟停止在內的各種起動功能。對于**為軟起動而制作的變頻器而言，應在起動完成后使變頻器脫電，使電動機直掛電網。這樣做的目的是節(jié)能，消除無謂的損耗。這種操作應該在安全的不引起電流沖擊的條件下完成，或者叫做軟切換。軟切換的可能步驟是“先脫（電）后掛（網）”或“先掛后脫”，軟切換應該在基本上不增加硬件（例如軟切換電抗器）的條件下主要靠軟件完成。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淄博科恩軟啟動器廠家,科恩軟啟動器" src="https://tyunfile.71360.com/UploadFile/keendianqi/637235132860009766/2511509.jpg"></div><p style="text-indent:25px">在電動機啟動時，降低加到電動機定子繞組的電壓可以減小電動機的啟動電流。一般降壓啟動是指電動機在啟動過程中加在電動機定子繞組的電壓變化是瞬間突變的，主要有“Y—△”降壓啟動和自藕變壓器降壓啟動等;而軟啟動是使用調壓裝置在規(guī)定的啟動時間內，自動地將啟動電壓連續(xù)、平滑地上升，直到達到額定電壓。若采用一般降壓啟動，則啟動過程是跳躍的、不平滑的，所以又叫作硬啟動，對生產工藝要求穩(wěn)啟動的場合不宜采用。而軟啟動從初始電壓開始電壓連續(xù)平穩(wěn)地增大，在啟動過程中電動機的轉矩是平滑的而不是跳躍的，啟動過程是平穩(wěn)的，所以叫軟啟動。軟啟動器工作原理是當電機啟動時，由電子電路控制晶閘管的導通角使電機的端電壓以設定的速度逐漸升高，一直升到全電壓，使電機實現(xiàn)無沖擊啟動到控制電動機軟啟動的過程。當電動機啟動完成并達到額定電壓時，使三相旁路接觸器閉合，電動機直接投入電網運行。如果是輕載，則在正常運行時，也保持所需的較低端電壓，使電機的功率因數升高，效率增大。在電機停機時，也通過控制晶閘管的導通角，使電機端電壓慢慢降低至0，從而實現(xiàn)軟停機。淄博科恩軟啟動器廠家</p><p style="text-indent:25px">淄博科恩軟啟動器廠家</p><p> 交流感應電動機在直接啟動時存在著兩點缺點，首先它的啟動電流可高達額定電流的5－7倍，這要求電網寬裕量比較大，而且降低電器控制設備的使用壽命，增加維護成本；其次，啟動轉矩可達正常轉矩的兩倍，這會對負載產生沖擊，增加傳動部件的磨損和額外維護?；谝陨显?，產生交流感應電動機降壓啟動設備。傳統(tǒng)的降壓啟動方法有Y/△啟動和自耦變壓器降壓啟動兩種，每種都有各自的缺點。電動機用Y/△啟動設備啟動時，在切換瞬間會出現(xiàn)很高的電流尖峰，產生破壞性的動態(tài)轉矩，其引起的機械振動對電動機轉子、軸連接器、中間齒輪以及負載等都非常有害；自耦變壓器降壓啟動設備體積龐大、成本高，而且還存在與負載匹配的電動機轉矩很難控制等缺點。由于傳統(tǒng)的降壓啟動設備存在諸多缺點，這才出現(xiàn)了電子式數字軟啟動裝置。淄博科恩軟啟動器廠家</p><p style="text-indent:25px">淄博科恩電氣自動化技術有限公司創(chuàng)立于2014-04-08，總部位于山東省淄博市，是一家機械產品、電子產品、五金電器、低壓電器、變頻器及配件、儀器儀表、電線電纜、電腦及配件、自動化成套系統(tǒng)、化工產品的銷售。(依法須經批準的項目，經相關部門批準后方可開展經營活動)的公司?？贫鞴罡袠I(yè)多年，始終以客戶的需求為向導，為客戶提供***的科恩變頻器,防爆柜,山東變頻器代理,電機智能軟啟動器。公司始終以本分踏實的精神和必勝的信念，影響并帶動同事和團隊取得成功。科恩供應始終關注電工電氣行業(yè)。海納百川，有容乃大，國內外同行的智慧都是促使我們前行的力量。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1025057.html</p></div></div></div></div></div><div id="od2y7kh" class="page-right twoColRt"><div id="tiaxptf" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="cm27gyf" 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配件哪家強信息推薦自業(yè)物資供應" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應</p></a></div><div id="mwyvxeg" class="recomPic likePro"><a 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