BOSCH 1070-914617現(xiàn)貨
本公司專業(yè)銷售大型進(jìn)口各種品牌DCS系統(tǒng)模塊備件:主營(yíng)產(chǎn)品:DCS集散式控制系統(tǒng)、PLC可編程控制。
主要業(yè)務(wù): ABB DCS卡件Ovation系統(tǒng)模塊Foxboro系統(tǒng)卡件Triconex系統(tǒng)模塊
Rexroth力士樂(lè)全系列產(chǎn)品Modicon停產(chǎn)模塊 等各類工控產(chǎn)品施耐德140系列CPU,PLC
西門子6DD,6FX,6SC,6FC,6S5系列AB1746,1756,1747,1785系列PLC
GE 通用電氣 發(fā)那科
隨著西門子變頻器的大力推廣后以及用戶對(duì)西門子變頻器的口碑傳播后,使得西門子變頻器在市場(chǎng)上受到群眾的大力追捧,不過(guò)用戶都會(huì)根據(jù)自己的實(shí)際工藝要求和運(yùn)用場(chǎng)合選擇不同類型的西門子變頻器,那么在選擇西門子變頻器時(shí),選擇者應(yīng)該注意些什么問(wèn)題呢?選擇西門子變頻器應(yīng)該從哪些方面進(jìn)行選擇呢?本文將給大家一一講解。
對(duì)于這個(gè)問(wèn)題,我們需要從不用的角度進(jìn)行分析和選擇。1、從變頻器負(fù)載特性上面進(jìn)行選擇
一般從負(fù)載特性進(jìn)行選擇的,都是類似于吹風(fēng)機(jī)等一下電氣,那么對(duì)這類型的,建議選擇西門子變頻器的mmv/mdv、mm420/mm440。
2、實(shí)際電動(dòng)機(jī)電流值作為變頻器選擇的依據(jù)
應(yīng)充分考慮變頻器的輸出含有豐富的高次諧波,會(huì)使電動(dòng)機(jī)的功率因數(shù)和效率變差。因此,用變頻器給電動(dòng)機(jī)供電與用工頻電網(wǎng)供電相比較,電動(dòng)機(jī)的電流會(huì)增加10%而溫升會(huì)增加20%左右。所以在選擇電動(dòng)機(jī)和變頻器時(shí)應(yīng)考慮到這種情況,適當(dāng)留有余量,以防止溫升過(guò)高,影響電動(dòng)機(jī)的使用壽命。
3、考慮西門子變頻器的緊湊型
推薦SINAMICS G120C緊湊型變頻器,在許多方面為同類變頻器的設(shè)計(jì)樹立了典范。包括它緊湊的尺寸,便捷的快速調(diào)試,簡(jiǎn)單的面板操作,方便友好的維護(hù)以及豐富的集成功能都將成為新的標(biāo)準(zhǔn)。
我們?cè)趤?lái)看看對(duì)于選擇西門子變頻器我們應(yīng)該注意那些事項(xiàng)呢?
1、變頻器若要長(zhǎng)電纜運(yùn)行時(shí),此時(shí)應(yīng)該采取措施抑制長(zhǎng)電纜對(duì)地耦合電容的影響,避免變頻器出力不夠。所以變頻器應(yīng)放大一、兩擋選擇或在變頻器的輸出端安裝輸出電抗器。
2、當(dāng)變頻器用于控制并聯(lián)的幾臺(tái)電動(dòng)機(jī)時(shí),一定要考慮變頻器到電動(dòng)機(jī)的電纜的長(zhǎng)度總和在變頻器的容許范圍內(nèi)。如果超過(guò)規(guī)定值,要放大兩擋來(lái)選擇變
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BOSCH 1070-914617
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