BEIJER QSI QTERM-K65

BEIJER QSI QTERM-K65

BEIJER QSI QTERM-K65

確保連續(xù)安全運(yùn)行，設(shè)有外部報(bào)警及報(bào)警復(fù)位功能；其它輸出端子用作工作狀態(tài)指示、故障報(bào)警及控制接觸器的通斷等。當(dāng)PLC的輸出端子Y017有輸出時(shí)，變頻器輸出正轉(zhuǎn)指令信號(hào)，電機(jī)拖動(dòng)絞車上行；當(dāng)Y021有輸出時(shí)，絞車減速上行；當(dāng)Y017無輸出時(shí)，絞車減速停車。
　　當(dāng)PLC的輸出端子Y020有輸出時(shí)，變頻器輸出反轉(zhuǎn)指令信號(hào)，電機(jī)帶動(dòng)絞車下行；由于位勢(shì)負(fù)載的作用，為防止絞車下行速度太快，當(dāng)下行速度超過給定速度值時(shí)，變頻器產(chǎn)生制動(dòng)力矩，使絞車在給定速度下穩(wěn)速下行，以確保到達(dá)停車點(diǎn)時(shí)準(zhǔn)確停車，避免由于運(yùn)矸車下行時(shí)慣性太大發(fā)生運(yùn)矸車撞擋板的現(xiàn)象。當(dāng)Y017和Y024同時(shí)有輸出時(shí)，絞車點(diǎn)動(dòng)上行；當(dāng)Y020和Y024同時(shí)有輸出時(shí)，絞車點(diǎn)動(dòng)下行。絞車的啟制動(dòng)加減速度、穩(wěn)速運(yùn)行速度，均可由變頻器的參數(shù)來設(shè)定，改動(dòng)和調(diào)整都非常方便。
　　利用變頻器的多段速度設(shè)定功能、直流制動(dòng)和轉(zhuǎn)矩補(bǔ)償功能，可滿足系統(tǒng)啟制動(dòng)及調(diào)速要求，避免了原系統(tǒng)采用主副電機(jī)相配合實(shí)現(xiàn)調(diào)速和啟制動(dòng)時(shí)所產(chǎn)生的機(jī)械磨損及噪音。為確保絞車安全運(yùn)行，系統(tǒng)設(shè)有自動(dòng)和手動(dòng)兩種運(yùn)行方式。手動(dòng)時(shí)為點(diǎn)動(dòng)斷續(xù)工作方式，自動(dòng)時(shí)運(yùn)行過程由PLC控制，通過變頻器內(nèi)部參數(shù)設(shè)置以直接轉(zhuǎn)矩控制方式運(yùn)行，只需由運(yùn)煤工或卸煤工按動(dòng)運(yùn)行按鈕。
信號(hào)隔離器發(fā)展至今，已有40多年的歷史，它幾乎是伴隨著早期工業(yè)自動(dòng)化的出現(xiàn)而出現(xiàn)，模擬量信號(hào)采集為工業(yè)過程精細(xì)化測(cè)量和控制帶來很大幫助，廣泛應(yīng)用于冶金、電力、水泥、船舶、機(jī)械制造等行業(yè)。
　　時(shí)至今日，從技術(shù)特點(diǎn)、使用特點(diǎn)及電路設(shè)計(jì)上，單片式隔離器發(fā)展已日臻成熟，無論是功能、可靠性還是客戶使用的方便性上，都有了極大的提高。智能化、集成化和便捷化是其發(fā)展的主要趨勢(shì)。
BEIJER QSI QTERM-K65
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