20BD125A0AYNANC0
20BD125A0AYNANC0
20BD125A0AYNANC0
《聯系人；歐先生》
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丹佛斯VLT系列變頻器以其良好的品質和服務贏得了廣大用戶的認可. 隨著VLT5000 FLUX 系列磁通矢量型變頻器的推出, 使其在高速造紙領域逐漸占有一席之地. 其主要特點有: 具有1000:1的調速比; 速度精度小于0.1%; 速度響應小于3ms; 滿負荷轉矩響應小于2ms; 根據電機溫度動態(tài)調整電機參數; 提供多種現場總線; 可編程的工藝控制器可提供包括PID運算在內的算數及邏輯運算, 可廣泛應用在負荷分配, 張力控制, 收放卷控制等工藝控制領域; 內置直流電抗器使其對電網諧波大大減小; 內置RFI濾波器避免了變頻器對其他設備的干擾. 滿足RS422規(guī)范的編碼器接口, 電纜長度可達150米, 由于具有實時監(jiān)測功能可靠性大為提高.
針對負荷分配問題, 我們給出如下解決方案:
變頻器由共用直流母線供電, 丹佛斯可提供整流/回饋裝置或由用戶提供. 各分部速度可由現場總線提供, 也可由變頻器本身形成速度鏈. 變頻器采用速度閉環(huán)控制. 從變頻器的速度參考值由主變頻器給定. 同時主變頻器提供給從變頻器轉矩信號. 從變頻器根據其轉矩與主變頻器的差別, 動態(tài)修正從變頻器的轉速, 從而保證兩個變頻器出力一致. 所有運算通過可自由編程的工藝控制卡實現.
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