IC697ALG445
IC697ALG445
IC697ALG445
以上為變頻器設置的基本參數(shù)，其中電動機參數(shù)欄FA-01至FA-05必須按照電機銘牌上的標示進行輸入，當輸入完電機參數(shù)后，要把F0-01設置為0；F0-02設置為0；然后把FA-00設置為11，為電機靜止自整定狀態(tài)，然后對電機進行檢測，變頻器對電機檢測完畢后將F0-01和F0-02的設置改為7和1，變頻器就將控制轉(zhuǎn)變?yōu)橥獠啃盘枂雍涂刂啤?
工頻系統(tǒng)的操作：
當變頻系統(tǒng)出現(xiàn)故障時，可將該系統(tǒng)還原到原來的工頻系統(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，將繞線式電機的轉(zhuǎn)子接線還原，連接工頻輸出端。然后再將絞車控制臺下方的凸輪控制器觸點彈簧全部安裝還原，這時工頻系統(tǒng)就恢復到未改變頻裝置之前一樣，提升機操作工可繼續(xù)按照原來工頻系統(tǒng)操作習慣進行控制。
四、節(jié)能計算
目前國內(nèi)各類礦山等提升機大都采用交流繞線式異步電動機轉(zhuǎn)子串電阻方式調(diào)速方案，使用交流接觸器改變轉(zhuǎn)子電阻來進行速度段的切換。對于繞線式電機，無論在起動?制動還是調(diào)速中，采用轉(zhuǎn)子串電阻方式均會帶來電能損耗。這種損耗隨著轉(zhuǎn)速的降低，轉(zhuǎn)差率S的增大而增大。繞線式電機的功率關系為：
式中：
上式中：若S=0.5時，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)測算提升機有30%的時間運行在低速段，節(jié)能率在24.5%左右，經(jīng)濟效益十分顯著。
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，容易造成觸點及線圈的燒毀，經(jīng)常維護電氣部分的接觸器、電機的碳刷與機械部分的剎車裝置等。變頻調(diào)速改造后，基本上無故障，大大地減少停工損失，產(chǎn)生的效益也不可小視。
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