2090-CFBM7DF-CEAF03

福州聚福興自動化有限公司為您提供2090-cfbm7df-ceaf03。

引言
　　在國產高壓變頻器的設計中，為了高壓變頻器內部控制的靈活性以及在現場應用的可擴展性，通常在高壓變頻器中內置plc。自從20世紀70年代臺plc誕生以來，plc的應用越來越廣泛、功能越來越完善，除了具有---的邏輯控制功能外還具其他擴展功能:a/d和d/a轉換、pid閉環回路控制、高速記數、通信聯網、中斷控制及特殊功能函數運算等功能，并可以通過機進行顯示、、記錄、人機對話，使其控制水平---。
　　本文以廣州智光電機有限公司為攀鋼集團成都鋼鐵有限公司污水處理廠設---產的國產高壓變頻器zinvert-h800/b10為例，介紹了三菱plc在高壓變頻器控制中的運用。
2、廣州智光電機高壓變頻器簡介
　　廣州智光電機有限公司推出的新一代---zinvert系列智能高壓變頻調速為直接高－高型變頻調速，通過直接調節接入高壓電機定子繞組的電源和電壓來實現電動機轉速的調節從而達到節能的目的。它是集大功率電力電子控制技術、微電子技術、高速光纖通信技術、自動化控制技術和高電壓技術等多學科為一體的-產品。該產品采用主流------雙dsp控制和-集成電路設計，通過的數字移相技術和波形控制技術實現了高壓電機的靈活調節和能耗控制。
3、plc在國產高壓變頻器中的設計使用
3.1 plc主要邏輯控制
　　1用戶要求高壓變頻器在出現故障停機時能快速自動切換到工頻旁路運行，筆者給高壓變頻器專門配置了可以實現自動旁路功能的旁路柜，如圖1所示，k1～k4為手動操作刀閘，j1～j3為高壓真空器。在變頻器發生故障時，旁路柜可以在幾秒內完成從變頻到工頻的轉換;而變頻器在工頻運行時，通過1個按鈕就可以實現變頻器從工頻到變頻的轉換。這樣的控制要求了變頻器整機控制邏輯的復雜性。

2090-cfbm7df-ceaf03

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