bently 3500/40M Proximitor 位移監(jiān)測器
bently 3500/40M Proximitor 位移監(jiān)測器
bently 3500/40M Proximitor 位移監(jiān)測器
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阿米控自動化備件解決方案
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各種大型進口DCS系統(tǒng)備品，備件。
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我們有我們自己的內(nèi)部庫存和大量的供應商為分銷商為您帶來的解決方案滿足您的需求!
阿米控自動化有一個堅定的承諾為您提供高質(zhì)量，高價值，和服務和各地的客戶！
我們有大量庫存的高品質(zhì)，停產(chǎn)的控制系統(tǒng)部件。我們還分發(fā)了許多新的硬件和軟件產(chǎn)品，廣泛的測試和出售的零部件都配備了1年的保修期。
2.發(fā)展趨勢
變頻器技術的發(fā)展趨勢經(jīng)歷大約三十年的研發(fā)與應用實踐，隨著新型電力電子器件和高性能微處理器的應用以及控制技術的發(fā)展，變頻器的性能價格比越來越高，體積越來越小，而廠家仍然在不斷地提高可靠性實現(xiàn)變頻器的進一步小型輕量化、高性能化和多功能化以及無公害化而做著新的努力。變頻器性能的優(yōu)劣，一要看其輸出交流電壓的諧波對電機的影響，二要看對電網(wǎng)的諧波污染和輸入功率因數(shù)，三要看本身的能量損耗（即效率），這此以交—直—交變頻器為例，從技術上看在以下幾個方面會進一步得到發(fā)展：
1．主電路功率開關元件的自關斷化、模塊化、集成化、智能化，開關頻率不斷提高，開關損耗進一步降低。
2．變頻器主電路的拓撲結構方面：變頻器的網(wǎng)側(cè)變流器對低壓小容量的常采用6脈沖變流器，而對中壓大容量的采用多重化12脈沖以上的變流器。負載側(cè)變流器對低壓小容量的常采用兩電平的橋式逆變器，而對中壓大容量的采用多電平逆變器。
3．脈寬調(diào)制變壓變頻器的控制方法：正弦波脈寬調(diào)制（SPWM）控制。消除指定次數(shù)諧波的PWM控制。電流跟蹤控制。電壓空間矢量控制（磁鏈跟蹤控制）。
4．交流電動機變頻調(diào)整控制方法的進展：由標量控制（V／f控制和轉(zhuǎn)差頻率控制）向高動態(tài)性能的矢量控制和直接轉(zhuǎn)矩控制發(fā)展。開發(fā)無速度傳感器的矢量控制和直接轉(zhuǎn)矩控制系統(tǒng)。
進入21世紀，電力電子的基片已從Si（硅）變換為SiC（碳化硅），使電力電子新器件進入到高電壓大容量化、高頻化、組件模塊化、微小型化、智能化和低成本化的時代，多種適宜變頻調(diào)速的新型電氣設備正在開發(fā)研制之中。IT技術的迅猛發(fā)展，以及控制理論的不斷創(chuàng)新，這些與變頻器相關的技術將影響其發(fā)展的趨勢。
交流變頻調(diào)速技術是強弱電混合、機電一體的綜合性技術，既要處理巨大電能的轉(zhuǎn)換（整流、逆變），又要處理信息的收集、變換和傳輸，因此它的共性技術必定分成功率和控制兩大部分。前者要解決與高壓大電流有關的技術問題和新型電力電子器件的應用技術問題，后者要解決（基于現(xiàn)代控制理論的控制策略和智能控制策略）的硬、軟件開發(fā)問題（在目前狀況下主要全數(shù)字控制技術）。
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