6ES75225HH000AB0
6ES75225HH000AB0
6ES75225HH000AB0
6ES75225HH000AB0
6ES75225HH000AB0
電梯減速按照距離直接停車(chē)平層，即要求各層站的減速距離完全一致。減速到平層時(shí)無(wú)爬行過(guò)程，由運(yùn)行速度直接向零速減速。為保證停車(chē)時(shí)的舒適感，應(yīng)確認(rèn)電梯到達(dá)零速時(shí)(此信號(hào)由變頻器給出)才給出合抱閘命令，再經(jīng)一級(jí)延時(shí)，給出停止勵(lì)磁指令。若停車(chē)后電梯沒(méi)有平層，應(yīng)進(jìn)行再平層控制。
3、再平層控制
若電梯停車(chē)后沒(méi)有準(zhǔn)確平層，或平層后因鋼絲繩形變使轎廂移位，應(yīng)進(jìn)行再平層。再平層應(yīng)在較低的速度下進(jìn)行(通常為運(yùn)行速度的1%)，且應(yīng)在電梯門(mén)打開(kāi)，電梯處在平層區(qū)內(nèi)的情況下進(jìn)行。SOHO-SM型變頻器有很好的低頻轉(zhuǎn)矩扭力，我們測(cè)得電梯在110%額定載重下仍能可靠地進(jìn)行再平層。
由于控制系統(tǒng)采用了脈沖編碼定位控制技術(shù)，故井道內(nèi)省略了減速感應(yīng)器，只在轎頂留下了一套平層感應(yīng)裝置，并具有再平層功能。
實(shí)踐證明，改造后的電梯運(yùn)行舒適感好，啟動(dòng)、減速、平層的舒適感不因轎廂負(fù)載的變化而變化，取得了令人滿(mǎn)意的效果。
改造中應(yīng)注意的幾個(gè)問(wèn)題
電梯技術(shù)改造并沒(méi)有固定模式，一切應(yīng)根據(jù)現(xiàn)場(chǎng)實(shí)際情況來(lái)定。但我們?cè)趯⑴f式交流雙速梯和調(diào)壓調(diào)速梯改造成變頻調(diào)速電梯過(guò)程中覺(jué)得以下幾個(gè)常遇到的問(wèn)題應(yīng)特別引起注意，以確保改造后電梯的安全使用。
1、貨梯改全自動(dòng)集選控制方式時(shí)，應(yīng)補(bǔ)裝安全觸板或光電保護(hù)裝置，無(wú)測(cè)重裝置的應(yīng)設(shè)法補(bǔ)裝。
2、保持原額定載重量，額定速度不變，保持鋼絲繩原曳引比方式不變。
3、應(yīng)用線(xiàn)路或軟件保證轎頂行慢車(chē)時(shí)，轎內(nèi)和機(jī)房不能走車(chē)，以確保轎頂操作人員的安全。
4、層門(mén)無(wú)自動(dòng)關(guān)閉裝置的應(yīng)在每層層門(mén)上增設(shè)可靠的層門(mén)自動(dòng)關(guān)閉裝置。
5、層門(mén)門(mén)扇是由繩、鏈聯(lián)接時(shí)，被動(dòng)門(mén)扇應(yīng)補(bǔ)設(shè)電氣安全裝置。
6、檢查測(cè)試限速器、安全鉗及其聯(lián)動(dòng)情況，不合格的限速器必須更換。
7、制動(dòng)器應(yīng)作全面分解，閘帶上不允許有油垢，電磁鐵可動(dòng)鐵芯與銅套間要干凈，并用石墨粉潤(rùn)滑。
四、SOHO-SM系列變頻器在水泥機(jī)械中的應(yīng)用
變頻調(diào)速技術(shù)在我國(guó)水泥行業(yè)的應(yīng)用日趨廣泛。在生產(chǎn)工藝需要調(diào)速的許多環(huán)節(jié)，如回轉(zhuǎn)窯、單冷機(jī)、喂料機(jī)、配料系統(tǒng)、風(fēng)機(jī)、水泵等，以交流變頻調(diào)速取代調(diào)壓調(diào)速、滑差調(diào)速以及直流調(diào)速已成為一種必然趨勢(shì)。
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