IC697ALG445
IC697ALG445
IC697ALG445
以上為變頻器設(shè)置的基本參數(shù)，其中電動(dòng)機(jī)參數(shù)欄FA-01至FA-05必須按照電機(jī)銘牌上的標(biāo)示進(jìn)行輸入，當(dāng)輸入完電機(jī)參數(shù)后，要把F0-01設(shè)置為0；F0-02設(shè)置為0；然后把FA-00設(shè)置為11，為電機(jī)靜止自整定狀態(tài)，然后對(duì)電機(jī)進(jìn)行檢測(cè)，變頻器對(duì)電機(jī)檢測(cè)完畢后將F0-01和F0-02的設(shè)置改為7和1，變頻器就將控制轉(zhuǎn)變?yōu)橥獠啃盘?hào)啟動(dòng)和控制。
工頻系統(tǒng)的操作：
當(dāng)變頻系統(tǒng)出現(xiàn)故障時(shí)，可將該系統(tǒng)還原到原來(lái)的工頻系統(tǒng)工作，切換到工頻系統(tǒng)后要做的工作有以下幾方面：斷掉系統(tǒng)總電源后，將繞線式電機(jī)的轉(zhuǎn)子接線還原，連接工頻輸出端。然后再將絞車控制臺(tái)下方的凸輪控制器觸點(diǎn)彈簧全部安裝還原，這時(shí)工頻系統(tǒng)就恢復(fù)到未改變頻裝置之前一樣，提升機(jī)操作工可繼續(xù)按照原來(lái)工頻系統(tǒng)操作習(xí)慣進(jìn)行控制。
四、節(jié)能計(jì)算
目前國(guó)內(nèi)各類礦山等提升機(jī)大都采用交流繞線式異步電動(dòng)機(jī)轉(zhuǎn)子串電阻方式調(diào)速方案，使用交流接觸器改變轉(zhuǎn)子電阻來(lái)進(jìn)行速度段的切換。對(duì)于繞線式電機(jī)，無(wú)論在起動(dòng)?制動(dòng)還是調(diào)速中，采用轉(zhuǎn)子串電阻方式均會(huì)帶來(lái)電能損耗。這種損耗隨著轉(zhuǎn)速的降低，轉(zhuǎn)差率S的增大而增大。繞線式電機(jī)的功率關(guān)系為：
式中：
上式中：若S=0.5時(shí)，電磁功率就有一半的功耗消耗在轉(zhuǎn)子的電阻上，調(diào)速系統(tǒng)效率非常低，只有50%左右。本例中，據(jù)測(cè)算提升機(jī)有30%的時(shí)間運(yùn)行在低速段，節(jié)能率在24.5%左右，經(jīng)濟(jì)效益十分顯著。
并且，原系統(tǒng)經(jīng)常故障，主要是交流接觸器觸頭頻繁閉合和斷開，容易造成觸點(diǎn)及線圈的燒毀，經(jīng)常維護(hù)電氣部分的接觸器、電機(jī)的碳刷與機(jī)械部分的剎車裝置等。變頻調(diào)速改造后，基本上無(wú)故障，大大地減少停工損失，產(chǎn)生的效益也不可小視。
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