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IC697ALG440
IC697ALG440 價格:800  元(人民幣) 產(chǎn)地:美國
最少起訂量:1 發(fā)貨地:福建廈門
上架時間:2018-08-21 09:55:22 瀏覽量:168
廈門光沃自動化設(shè)備有限公司  
經(jīng)營模式:經(jīng)銷商 公司類型:其他有限責任公司
所屬行業(yè):PLC控制系統(tǒng) 主要客戶:全國市場
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IC697ALG440

IC697ALG440

IC697ALG440


變頻器選用希望森蘭科技股份有限公司生產(chǎn)的SB70G280高性能系列矢量控制變頻器,變頻器主要特點是:集成高精度轉(zhuǎn)子磁場定向矢量控制算法,具有250%瞬時轉(zhuǎn)矩控制能力,實現(xiàn)轉(zhuǎn)矩的快速響應(yīng)和準確控制,能以很高的精度進行寬范圍的調(diào)速運行;獨創(chuàng)的多模式PLC運行功能,特別適合工業(yè)制造設(shè)備等應(yīng)用;實用的多段速功能:提供編碼、直接、疊加和個數(shù)選擇方式;強大的PID功能等;具備強大的編程功能,用戶可自定義內(nèi)部I/O模塊;轉(zhuǎn)差補償,AVR自動穩(wěn)壓功能。模擬量輸入可設(shè)置為±10V,當模擬量輸入信號由正變到負時,電機運轉(zhuǎn)方向也隨之改變,反之亦然。在自整角機上設(shè)置相應(yīng)的參數(shù),使操縱桿從中心零位開始往前輸出正信號,往后輸出負信號,這會給使用上帶來方便。

提升機變頻調(diào)速方案方框圖如圖2所示:

圖2:礦井提升機變頻調(diào)速方案

三、方案實施

斜井提升負載特性是摩擦性位能負載,屬恒轉(zhuǎn)矩特性負載。提升機帶五個斗,裝滿物料沿斜面起動上行時,電機的轉(zhuǎn)矩要克服負載阻轉(zhuǎn)力矩和摩擦力,逐漸加速到全速運行,快到井口時,要逐漸減速。為提高效率,上行加速段和減速段的時間要盡量短,上行加速的時間可適當加大矢量控制變頻器的容量來保證,由于負載重慣性大,當要求減速時間短時,上行的減速過程中有再生能量產(chǎn)生,會使變頻器直流側(cè)電壓升高而“過壓”,為此,需要用能耗制動單元加制動電阻或回饋單元處理再生能量;在下放過程中,提升機帶的已經(jīng)是空斗了,但在快速下放的過程仍有再生能量產(chǎn)生,也需要處理再生能量。

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