AS-MEEP-001
AS-MEEP-001AS-MEEP-001
ABB軟啟動(dòng)器啟動(dòng)抖動(dòng)故障維修案例?軟啟動(dòng)器是一種利用可控硅進(jìn)行電壓調(diào)節(jié)工業(yè)自動(dòng)話設(shè)備。在中國(guó),所有工業(yè)和民用電力都是50HZ,380V或220V的交流電源,在進(jìn)行做功時(shí),頻率固定不變。而在電動(dòng)機(jī)應(yīng)用領(lǐng)域,存在電動(dòng)機(jī)帶大慣量負(fù)載啟動(dòng)的情況,此時(shí)如果不進(jìn)行必要的技術(shù)處理,就會(huì)造成設(shè)備啟動(dòng)困難、啟動(dòng)失敗甚至設(shè)備損壞。為了降低啟動(dòng)電流,并使電機(jī)帶負(fù)載逐漸加速,工程師們發(fā)明了可控硅軟啟動(dòng)技術(shù),從而徹底解決由于啟動(dòng)電流過大導(dǎo)致的各種故障。
可控硅軟啟動(dòng)器的基本原理正是利用可控硅的特性進(jìn)行工作的,可控硅導(dǎo)通的條件是,可控硅正端電壓高于負(fù)端電壓的同時(shí),觸發(fā)信號(hào)出現(xiàn),此時(shí)可控硅保持導(dǎo)通,直到出現(xiàn)過零點(diǎn)。而我國(guó)電網(wǎng)電壓為三相頻率為50HZ的正弦波信號(hào),我們采用一定的技術(shù)手段使可控硅在特定時(shí)間(即觸發(fā)角進(jìn)行觸發(fā)),即可達(dá)到調(diào)節(jié)輸出電壓的目的。由于電機(jī)的續(xù)流作用,在電動(dòng)機(jī)上的電壓波形雖然是不完整的正弦波形,但是電流波形卻依然是正弦波,所以此時(shí)電動(dòng)機(jī)運(yùn)行是沒有問題的。~~~~~~~~~~~~~~~~~~~~~~~~~~~~
公司 名稱:廈門泰尼電氣有限公司
固定 電話:0592-6809819
聯(lián) 系 人:張亮
傳 真:0592-6890859【請(qǐng)備注“張亮”收】
商 務(wù) Q Q: 2314094943
手 機(jī):18030028083
Q Q 郵 箱:2314094943@qq.com
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公司地址:廈門市海滄區(qū)海滄街道濱湖一里7號(hào)2008室
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在電動(dòng)機(jī)啟動(dòng)過程中,采用控制可控硅觸發(fā)角的方式進(jìn)行輸出電壓的控制,從而實(shí)現(xiàn)電動(dòng)機(jī)帶負(fù)載柔性啟動(dòng),從而避免對(duì)電網(wǎng)電壓的強(qiáng)烈干擾,提高功率因素,同時(shí)降低設(shè)備故障率。當(dāng)軟啟動(dòng)過程完成后,可控硅進(jìn)行全導(dǎo)通,此時(shí)可控硅輸出電壓已經(jīng)接近于正弦波了,設(shè)備進(jìn)入正常運(yùn)行階段。設(shè)備停機(jī)時(shí),同樣通過控制可控硅的觸發(fā)角使用輸出電壓逐漸減小,從而避免了機(jī)械的強(qiáng)烈震蕩。
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