KULICKE & SOFFA 01483-4204-000-08近幾年來，變頻節(jié)能技術(shù)兗州礦區(qū)的地面和井下提升、通風(fēng)、采煤、運(yùn)輸、選煤等各種礦山設(shè)備控制系統(tǒng)得到了廣泛的應(yīng)用，對國內(nèi)同行具有很好的參考價值。
一、KULICKE & SOFFA 01483-4204-000-08在提升系統(tǒng)應(yīng)用
1、礦用提升機(jī)變頻調(diào)速控制的特殊功能
兗州礦業(yè)（集團(tuán)）公司南屯煤礦通過對礦用提升機(jī)變頻調(diào)速控制的研究，使其特殊功能得到正常應(yīng)用，取得了良好的效。
①直流制動的作用。當(dāng)重車需在井筒中間停車時，變頻器由高速平滑地降到低速，隨之施加一個直流制動信號使提升機(jī)停止，機(jī)械制動起作用后方可去掉直流制動信號，使重車靠機(jī)械抱閘的作用停在中間。啟動時先對電機(jī)施加一個直流制動信號，當(dāng)檢測到機(jī)械抱閘打開方可去掉直流制動信號，加上啟動電壓，提升機(jī)轉(zhuǎn)動。機(jī)械抱閘抱緊狀態(tài)一直在變頻器檢測下，一旦機(jī)械抱閘打開馬上給電機(jī)施加直流制動信號，確保避免重車“溜勾”現(xiàn)象。
②S形速度曲線。為減少運(yùn)行的機(jī)械沖擊，在變頻器啟動與停止過程中最好做到加速度是連續(xù)的，即S形加、減速曲線。當(dāng)井下及井口停車傾角很小時，要求提升機(jī)運(yùn)行速度很低，否則會出現(xiàn)“松繩”現(xiàn)象。另外，井筒罐道要求變頻器能以不同頻率工作。根據(jù)現(xiàn)場情況，變頻器可設(shè)置5個頻率段主令控制器的不同位置對應(yīng)不同的直流控制電壓，即對應(yīng)不同的運(yùn)行頻率。
③KULICKE & SOFFA 01483-4204-000-08自動限速保護(hù)。當(dāng)運(yùn)行接近終點時給出一個減速信號，接到此減速信號后，如主令控制器已操作減速，則變頻器按主令控制器的操作改變運(yùn)行速度；若收到減速信號后主令控制器沒有正常操作，則自動啟動機(jī)內(nèi)的自動減速程序，將變頻器工作頻率按預(yù)定要求逐步改變?yōu)榈退龠\(yùn)行。這對于預(yù)防“過卷”是十分必要的。此外，當(dāng)提升機(jī)帶有測速發(fā)電機(jī)給出超速信號時，變頻器也能自動減速。
④連鎖開機(jī)功能。提升機(jī)開機(jī)須按給出命令操作。當(dāng)給出“上行”或者“下行”命令的時候，如人員操作與命令不符，連鎖功能就對此操作不響應(yīng)，變頻器不啟動。連鎖功能是保證安全運(yùn)行的重要措施。
⑤對再生能量的處理。變頻器的主回路采用雙向逆變方案。
2、KULICKE & SOFFA 01483-4204-000-08井下絞車電控系統(tǒng)變頻技術(shù)應(yīng)用
兗州礦業(yè)（集團(tuán)）公司興隆莊煤礦在十采區(qū)JBT-2×1.8絞車電控系統(tǒng)成功采用變頻技術(shù)。其設(shè)計滿足《煤礦安全規(guī)程》、GB3836.1-4-2000《防爆規(guī)程》、GB50070-1994《礦山電力設(shè)計規(guī)范》、《煤礦提升絞車安全檢驗規(guī)范》、JB4263-2000 《交流傳動礦井提升機(jī)電控設(shè)備技術(shù)條件》、JB8516-1997《礦用提升機(jī)和礦用提升絞車安全要求》、MT/T834-1999《煤礦用提升信號裝置通用技術(shù)條件》等要求，使絞車運(yùn)行系統(tǒng)得以優(yōu)化。
電控系統(tǒng)和保護(hù)系統(tǒng)采用變頻調(diào)速技術(shù)，輸入電源660V、50Hz，電壓允許波動范圍－15%～＋10%，允許頻率波動范圍±2.5%，輸出功率200kW，輸出頻率0～50Hz連續(xù)可調(diào)。過載能力強(qiáng)，在負(fù)載變化為－120%～＋120%額定負(fù)載時能滿足四象限運(yùn)行要求；低頻運(yùn)轉(zhuǎn)時，有自動轉(zhuǎn)矩提升功能，能保證100%額定轉(zhuǎn)矩；有過壓、欠壓、過流、斷相和功率元件過熱等保護(hù)。
控制箱采用快開門方式，電氣控制采用雙PLC全數(shù)字控制系統(tǒng)，兩套PLC與硬件電路互相冗余完成絞車提升控制與數(shù)字監(jiān)控，同時在PLC故障時能分別完成臨時應(yīng)急提升?？刂葡到y(tǒng)配備正常操作而設(shè)置的各種保護(hù)，其中的防止過卷裝置、過速裝置、限速裝置和減速功能保護(hù)設(shè)置為相互獨(dú)立的雙線形式。系統(tǒng)還具有各種保護(hù)試驗功能。聲光信號與控制回路具有閉鎖功能，未發(fā)信號不能開車，發(fā)出信號的時間次數(shù)記憶不少于30天。深度指示采用數(shù)字顯示，能準(zhǔn)確清楚顯示出礦車在巷道中運(yùn)行位置。深度指示一旦失效能迅速斷電停車。絞車控制具有手動、自動、檢修運(yùn)行及遠(yuǎn)程控制等操作方式。檢修時能手動操作，運(yùn)行速度0.3～0.5m/s，操作方便可靠。變頻器采用模塊式結(jié)構(gòu)，出現(xiàn)故障時能方便查找故障點并及時進(jìn)行更換，維修簡單。操作臺除有正常的各種操作開關(guān)與按鈕外，還有深度、速度、電壓、電流、油壓和溫度等指示，比較直觀。
二、KULICKE & SOFFA 01483-4204-000-08礦井主扇風(fēng)機(jī)實現(xiàn)自動化調(diào)頻控制
兗州礦業(yè)（集團(tuán)）公司楊村煤礦和山東省煤炭科學(xué)研究所將可編程序控制器成功應(yīng)用于該礦南、北風(fēng)井主扇風(fēng)機(jī)自動化變頻系統(tǒng)，與國內(nèi)使用單片機(jī)、工控機(jī)進(jìn)行改造的類似項目相比，無論是可靠性還是參數(shù)變更靈活性都具有不可比擬的優(yōu)越性。
1、此項成果的主要功能如下
①系統(tǒng)自動化控制。PLC接到運(yùn)行指令時，判斷運(yùn)行機(jī)號和運(yùn)行方式。若為低頻方式則驅(qū)動低頻接觸器吸合，延時0.4s發(fā)出變頻器運(yùn)行令，電機(jī)啟動至設(shè)定頻率風(fēng)門絞車開啟扇風(fēng)機(jī)進(jìn)風(fēng)門，前導(dǎo)器執(zhí)行機(jī)構(gòu)打開扇風(fēng)機(jī)前導(dǎo)器，使扇風(fēng)機(jī)進(jìn)入工作狀態(tài)。若為工頻方式則控制風(fēng)機(jī)降壓啟動，當(dāng)啟動電流降至設(shè)定值時停掉降壓啟動接觸器，吸合運(yùn)行主接觸器，風(fēng)機(jī)轉(zhuǎn)入全速運(yùn)行狀態(tài)，30s后風(fēng)門及前導(dǎo)器自動打開。
②風(fēng)量閉環(huán)控制。風(fēng)機(jī)低頻運(yùn)行時，風(fēng)量由給定信號控制。該信號與風(fēng)量傳感器反饋信號同時進(jìn)入PLC的A/D模塊，經(jīng)CPU比較調(diào)節(jié)后，輸出信號由D/A模塊送至變頻器頻率設(shè)定接口，調(diào)節(jié)變頻器輸出頻率，從而改變風(fēng)機(jī)轉(zhuǎn)速。
③風(fēng)機(jī)低頻故障轉(zhuǎn)換。PLC在風(fēng)機(jī)低頻運(yùn)行中自動檢測變頻器運(yùn)行情況，變頻器出現(xiàn)高中時自動切除低頻系統(tǒng)使風(fēng)機(jī)轉(zhuǎn)入工頻運(yùn)行。
④電機(jī)過流保護(hù)。電機(jī)變送器將主回路電路電流信號轉(zhuǎn)換后送入CPU內(nèi)部功能存貯器，CPU在每個掃描周期將該數(shù)據(jù)與內(nèi)部電流設(shè)定值比較，超過設(shè)定值即進(jìn)行保護(hù)。
⑤KULICKE & SOFFA 01483-4204-000-08風(fēng)門行程精確控制。PLC開閉風(fēng)機(jī)風(fēng)門時，安裝在風(fēng)門絞車主軸上的軸編碼器將風(fēng)門行程轉(zhuǎn)換為數(shù)據(jù)信號送至高速記數(shù)模塊，待其譯為BCD碼后存入內(nèi)部存儲器，CPU在每個掃描周期將BCD數(shù)據(jù)與行程設(shè)定值比較，超出設(shè)定值即停車。
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WESTINGHOUSE S-1303512-A NSPP S1303512A
WESTINGHOUSE EH3050 NSPP EH3050
Details about ATLAS COPCO .75BRNSS010 NSFP 75BRNSS010
Mitsubishi QJ1BT11
Details about MOORE PRODUCTS 40-200 NSFP 40200
Details about MARTIN H50B13 NSPP H50B13
Customs services and international tracking provided
Details about GO SWITCH 11-11118-00 USPP 111111800
Details about POWER ONE HAA15-505 USPP HAA15505
Details about Panduit Pneumatic Cable Tie & Cut gun PPTS Tension gun
Details about FURNAS ELECTRIC CO 3TB4-010-0AN2 USPP 3TB40100AN2
Details about ITE SIEMENS W100046 NSFP W100046
WESTINGHOUSE GFN324N USPP GFN324N
Details about TOSHIBA MG100J2YS45 USPP MG100J2YS45
Customs services and international tracking provided
Details about FURNAS ELECTRIC CO 45CG20AHB NSFP 45CG20AHB
WESTINGHOUSE 1265C95G03 USPP 1265C95G03
Details about TEXAS INSTRUMENTS PLC 500-5047A FNFP 5005047A
RELIANCE ELECTRIC 0-50007-R USPP 050007R
Details about SIEMENS TM-E15S24-01 USPP TME15S2401
Details about GENERAL CONTROLS ELECTRONICS PS48VDC/3.75/GCE NSPP PS48VDC375GCE
Details about Motorola Micor Repeater control and low power TX ex police radio network
SICK OPTIC ELECTRONIC WS/WE6-P132 NSFP WSWE6P132
Details about WIKA 212.34-4.5-100-1/2-LM NSPP 212344510012LM
Details about TOSHIBA EX10*UBB1 6 SLOT RACK
International Power IHE24-7.2 Power Supply New
