A06B-2048-B605#0042
1 直接起動(dòng)作業(yè)辦法
通常7千瓦以下的小功率電動(dòng)機(jī)起動(dòng)電流對(duì)設(shè)備作業(yè)的影響不大。所以常常選用三相空氣開(kāi)關(guān)或漏電維護(hù)器或經(jīng)過(guò)磁力起動(dòng)器,直接起動(dòng)和作業(yè)電動(dòng)機(jī)。
2 Y/△起動(dòng)作業(yè)辦法
此辦法適用于△型接線作業(yè)的電動(dòng)機(jī),運(yùn)用溝通觸摸器的接線組合,起動(dòng)時(shí)電動(dòng)機(jī)選用Y型接法下降起動(dòng)電流,跋涉起動(dòng)轉(zhuǎn)矩,起動(dòng)后主動(dòng)選用△型接法進(jìn)入正常作業(yè)狀況。
3 起動(dòng)作業(yè)辦法
起動(dòng)時(shí)運(yùn)用自耦變壓器的有些繞組與電動(dòng)機(jī)串聯(lián),下降電動(dòng)機(jī)的起動(dòng)電壓,然后下降電動(dòng)機(jī)的起動(dòng)電流。起動(dòng)后主動(dòng)切除自耦變壓器,進(jìn)入正常作業(yè)狀況。
4 制起動(dòng)作業(yè)辦法
此辦法是如今新式的一種節(jié)能環(huán)保安全的起動(dòng)作業(yè)辦法,起動(dòng)時(shí)輸出電壓跟著主張頻率的不斷添加而添加,在滿意負(fù)載起動(dòng)轉(zhuǎn)矩的懇求下,操控起動(dòng)電流的平穩(wěn)上升,起動(dòng)后依據(jù)負(fù)載的改動(dòng)懇求,主動(dòng)調(diào)整調(diào)頻器的輸出轉(zhuǎn)矩,使電動(dòng)機(jī)可以安全平穩(wěn)的作業(yè)。由于電動(dòng)機(jī)的負(fù)載轉(zhuǎn)矩低于電動(dòng)機(jī)的額外轉(zhuǎn)矩,不然不能正常作業(yè),所以電動(dòng)機(jī)正常作業(yè)往后不需求滿負(fù)荷作業(yè),此刻調(diào)頻器會(huì)主動(dòng)下降作業(yè)電壓,然后可以節(jié)省許多的電能。其他,在電動(dòng)機(jī)發(fā)作缺陷時(shí),調(diào)頻器會(huì)主動(dòng)堵截輸出電壓,避免缺陷的進(jìn)一步拓展,大大的跋涉了設(shè)備的安全功用。
A06B-2048-B605#0042
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