1756-CFM

1756-CFM

晶閘管調(diào)壓主電路、控制電源、同步信號采樣電路、移相信號形成電路、觸發(fā)(功放)電路等可稱之調(diào)速器的基本電路，這是任何直流調(diào)速器都的幾個(gè)環(huán)節(jié);輸出電壓檢測、輸出電流檢測電路，有時(shí)還包括輸入電壓(缺相)檢測、晶閘管模塊溫度檢測電路，可統(tǒng)稱為晶閘管的保護(hù)電路，此為輔助電路之一;各種輸入、輸出信號——控制信號處理電路，是提升了設(shè)備的可操作控制功能，完成對直流電機(jī)的起停、調(diào)速、反饋信號處理、調(diào)速器工作狀態(tài)的指示等，此為輔助電路之二。高、低檔機(jī)型的區(qū)別和差異，更多地從輔助電路的設(shè)計(jì)上可看得出來。

其中，主電路結(jié)構(gòu)無論何種機(jī)型，都是相同的;同步信號采樣電路與觸發(fā)電路，都是大同小異的。移相、保護(hù)信號形成電路和控制信號形成電路，則具機(jī)型不同，而呈現(xiàn)較大的差異，如對控制信號、保護(hù)信號和移相信號的處理，有的機(jī)型由簡易模擬電路(晶體管分立元件)來完成，有的采用模擬、數(shù)字的硬件電路來完成，機(jī)型則采用8位或16位單片機(jī)，對所有信號進(jìn)行智能化處理，使輸出的觸發(fā)觸沖信號里“揉和了多重優(yōu)化的控制信息”，其控制特性便與普通機(jī)不可同日而語了。

控制信號處理電路，有的只能完成開環(huán)調(diào)壓控制，有的也僅能完成簡易的閉環(huán)速度調(diào)節(jié)，處于比例(P)調(diào)節(jié)的層面上，有的機(jī)型則用復(fù)雜電路(或軟件手段)來完成PID控制功能，大大提升了系統(tǒng)的動態(tài)控制特性。

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