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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