6SE6430-2UD41-3FA0
注意電機(jī)(就像 VFD)也可以承受反射波和電壓尖峰的損害。這就是為什么今天的許多自動(dòng)化裝置都在使用變頻器電機(jī)的原因。這些電機(jī)的定子繞組采用絕緣材料和其它元件,提高了整體熱容量,并在大多數(shù)情況下具有電壓尖峰恢復(fù)能力。額定參數(shù)按照浪涌電壓的大小和持續(xù)時(shí)間來(lái)區(qū)分——額定值較高適用于涉及上升時(shí)間較長(zhǎng)(較不突然)的設(shè)計(jì)。當(dāng)然,沒(méi)有按照變頻器規(guī)格制造的電機(jī)也可以采用 VFD 進(jìn)行驅(qū)動(dòng)。然而,這些不太可靠的電機(jī)的應(yīng)用一般應(yīng)限于具有中等難度參數(shù)的自動(dòng)化設(shè)備。由 VFD 驅(qū)動(dòng)的任何此類(lèi)電機(jī)可能還需要一個(gè)短的電纜線(xiàn)路,以及包含線(xiàn)路電抗器和其他保護(hù)組件。
救援電纜:專(zhuān)門(mén)為 VFD 設(shè)計(jì)的電纜
除了威脅到 VFD,具有足夠高電壓的同相復(fù)合波會(huì)損壞不當(dāng)使用的通用電纜。更具體地說(shuō),與 VFD 運(yùn)行相關(guān)的高壓尖峰會(huì)對(duì)電纜的絕緣層產(chǎn)生壓力、熱量,甚至刺穿。為了防止這個(gè)問(wèn)題,專(zhuān)門(mén)為 VFD 設(shè)計(jì)的電纜需要具有以下特性:
重載(小 AGG)導(dǎo)體的額定能力可承受所有預(yù)期峰值電壓
足夠厚的接口和專(zhuān)門(mén)設(shè)計(jì)的交聯(lián)聚乙烯或(在某些情況下不太受歡迎)聚氯乙烯的絕緣層
護(hù)套和其他元素,以對(duì) VFD 產(chǎn)生的尖峰和噪聲進(jìn)行分散和接地
Alpha Wire 用于 VFD 的電纜包括了交聯(lián)聚乙烯絕緣層,具有抗電磁電暈?zāi)芰?、?span style="margin: 0px; padding: 0px;text-decoration:underline;">電容(甚至在電纜較長(zhǎng)時(shí))和良好的低溫性能。
6SE6430-2UD41-3FA0
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