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href="/">首頁(yè)</a> > <a href="/html/list-20-1.html">新聞中心</a> > <a href="/html/list-21-1.html">新聞資訊</a></div> <div class="bottl2w" id="bodycontent"> <div style="width:950px;height:30px;" class="news_content_title"> <h3 style="color:#333;margin:0pt 0pt 0pt 0pt;"> <strong>基于PLC的高壓互感器線(xiàn)圈繞線(xiàn)機的原理</strong> </h3><hr width="95%" size="1" noshade> </div> <div style="width:950px; text-align:left; line-height:180%;" class="news_content_body"> <p class="MsoNormal"> <span style="line-height:1.5;"> </span><span style="line-height:1.5;">高壓互感器是電力系統中發(fā)電廠(chǎng)、變電站等不可缺少的一種高壓電器，可實(shí)現高精度的高</span><span style="line-height:1.5;">-</span><span style="line-height:1.5;">低壓轉換以便于對電網(wǎng)電壓的檢測和電能計量。精密高電壓互感器的電磁繞組為重要功能部件，對于通常高達數萬(wàn)匝高電壓互感器線(xiàn)圈繞組，在其繞制過(guò)程中如何控制匝間、層間絕緣、減少分布電容影響，達到轉換測量精度要求，可靠、高精度的</span><b style="line-height:1.5;"><a href="http://www.e-seiyaku.com/" target="_blank">全自動(dòng)繞線(xiàn)機</a></b><span style="line-height:1.5;">是保證互感器產(chǎn)品質(zhì)量的關(guān)鍵因素。高電壓互感器及電磁繞組如圖</span><span style="line-height:1.5;">1</span><span style="line-height:1.5;">、圖</span><span style="line-height:1.5;">2</span><span style="line-height:1.5;">所示。</span> </p> <p class="MsoNormal" style="text-align:center;"> <span><img width="492" height="306" src="/upload/image/20200224/20200224095578617861.png" title="高電壓互感器及電磁繞組" align="" alt="高電壓互感器及電磁繞組" /></span> </p> <p class="MsoNormal"> <span> </span> </p> <p class="MsoNormal"> <span>1</span>高電壓互感器線(xiàn)圈新型繞線(xiàn)機總體設計 </p> <p class="MsoNormal"> 高電壓互感器電壓高達等級幾十萬(wàn)伏，其電磁繞組線(xiàn)圈匝數多達幾萬(wàn)匝，通常采用自動(dòng)化機器繞制。目前，國內使用的傳統<b>自動(dòng)繞線(xiàn)機</b>，一般由機座、繞線(xiàn)電動(dòng)機、主傳動(dòng)機構、排線(xiàn)電動(dòng)機及排線(xiàn)傳動(dòng)機構等部分組成。繞線(xiàn)機主傳動(dòng)機構采用變頻電動(dòng)機拖動(dòng)，通過(guò)變頻器面板旋鈕調節繞組輪轂轉速，其從動(dòng)排線(xiàn)機構采用微型直流電動(dòng)機拖動(dòng)，也通過(guò)旋鈕完成調速。主、從兩部分運轉速度的協(xié)調，需要人工根據不同繞組規格進(jìn)行計算調整，操作繁復且難以保證繞線(xiàn)質(zhì)量和效率，時(shí)有斷線(xiàn)、疊線(xiàn)、跳線(xiàn)等故障，需人工操作調整的工作量大。由此，針對傳統繞線(xiàn)機的不足之處，從電控、機械兩方面做改進(jìn)設計。 </p> <p class="MsoNormal"> 其一，繞線(xiàn)機電氣控制系統改進(jìn)設計。選用<span>PLC</span>控制器、步進(jìn)驅動(dòng)器和步進(jìn)電動(dòng)機進(jìn)行設計，配置觸模屏，改善自動(dòng)繞線(xiàn)機可視化操作用戶(hù)界面，通過(guò)設置不同工藝參數，調用相應控制程序，可完成對不同規格線(xiàn)圈繞組的自動(dòng)化繞制，并能提高繞制過(guò)程自動(dòng)化控制程度，減小人為因數影響，保證繞制質(zhì)量、效率和穩定性。 </p> <p class="MsoNormal" style="text-align:center;"> <span><img width="624" height="363" src="/upload/image/20200224/20200224095511101110.png" title="繞線(xiàn)機總體框架結構" align="" alt="繞線(xiàn)機總體框架結構" /></span> </p> <p class="MsoNormal"> 其二，繞線(xiàn)機機械結構改進(jìn)設計。重新設計工作臺基座、鐵芯裝夾平臺機構部件、繞組輪轂壓緊調整機構，主傳動(dòng)機構部件、自動(dòng)排線(xiàn)機構部件、繞線(xiàn)張力控制及導線(xiàn)機構等部件。選用標準型伺服張力器以方便穩定調節導線(xiàn)張力，實(shí)現穩定的導引牽線(xiàn)排線(xiàn)功能，改進(jìn)型繞線(xiàn)機總體結構如圖<span>3</span>所示，傳動(dòng)系統簡(jiǎn)圖如圖<span>4</span>所示。<span>2</span>繞線(xiàn)機電氣控制系統繞線(xiàn)機電氣控制系統可分為電氣控制盒部件和操作面板部件兩部分，電氣控制盒內部安裝有直流電源、伺服驅動(dòng)器、<span>PLC</span>控制器及接線(xiàn)端子排等；操作面板配置有起、停操作按鈕、指示燈和參數設置觸摸屏人機界面等。選用三菱<span>FX-3U</span>系列可編程控制器作為主控單元，根據編制的<span>PLC</span>應用控制程序，完成對兩臺步進(jìn)電動(dòng)機驅動(dòng)器的指令控制，協(xié)調繞組線(xiàn)圈主傳動(dòng)步進(jìn)電動(dòng)機與自動(dòng)排線(xiàn)電動(dòng)機的運轉。此外，<span>PLC</span>控制器還接收操作面板和觸摸屏上按鈕的指令信號，以控制繞線(xiàn)程序啟、停運行，并將繞線(xiàn)機運行狀態(tài)信息輸出到相應指示燈和觸摸屏界面顯示，提供給操作者查看可監控設備的運行。觸摸屏與<span>PLC</span>控制器通過(guò)串行通信接口相連，通過(guò)在觸摸屏上設置不同工藝參數，調用不同的繞線(xiàn)工藝程序可實(shí)現對不同規格的電磁線(xiàn)圈繞制。繞線(xiàn)機總體電氣連接如圖<span>5</span>所示。 </p> <p class="MsoNormal" style="text-align:center;"> <span><img width="476" height="431" src="/upload/image/20200224/20200224095630843084.png" title="繞線(xiàn)機總體電氣連接" align="" alt="繞線(xiàn)機總體電氣連接" /></span> </p> <p class="MsoNormal"> <span> </span> </p> <p class="MsoNormal"> <span>2.1</span>繞線(xiàn)機運轉<span>PLC</span>控制程序設計 </p> <p class="MsoNormal"> 根據繞組線(xiàn)圈的繞制工藝要求，設計繞線(xiàn)機<span>PLC</span>控制程序。首先，設計點(diǎn)動(dòng)運行檢測程序，測試繞線(xiàn)機主傳動(dòng)機構運轉，排線(xiàn)絲桿左右移動(dòng)等。在面板上設計“主輪旋轉”，“排線(xiàn)左移”，“排線(xiàn)右移”按鈕，測試繞機空載時(shí)運行狀態(tài)是否正常，并調試各級不同的繞線(xiàn)速度，控制主傳動(dòng)機構和從動(dòng)排線(xiàn)機構空運轉和復位。點(diǎn)動(dòng)檢測程序檢查正常之后，設計<span>PLC</span>自動(dòng)繞線(xiàn)程序，控制繞線(xiàn)的完整工藝過(guò)程。根據待繞線(xiàn)頭初始位置，確定排線(xiàn)絲桿移動(dòng)方向；調用參數計算子程序，根據線(xiàn)圈各級所設置的工藝參數、計算出主輪電動(dòng)機、絲桿電動(dòng)機運行頻率與脈沖數，存儲于內部數據組表格，用以控制對應當前層、段的導線(xiàn)繞制，并在觸摸屏上顯示當前繞制位置與繞制導線(xiàn)匝數。 </p> <p class="MsoNormal"> 在程序控制運轉過(guò)程中，若出現繞制斷線(xiàn)、疊線(xiàn)等意外情況，設備可急停，待人工處理好異常之后，按“復位”控鍵，<span>PLC</span>程序可控制自動(dòng)排線(xiàn)機構退回到當次繞線(xiàn)的起始位置，并復位當次繞制的匝數計數器，選擇“排線(xiàn)左移”或“排線(xiàn)右移”按鈕，則重新開(kāi)始當前層線(xiàn)圈繞制并繼續運行。根據高電壓互感器絕緣工藝要求，線(xiàn)圈繞組完成一段繞制后，需插入電工絕緣紙膜覆蓋保護，再進(jìn)行下一段線(xiàn)圈的繞制。因此，<span>PLC</span>控制程序中設計了包膜運轉子程序，控制電磁繞組骨架慢速旋轉<span>2</span>～<span>3</span>圈完成絕緣材料覆蓋包膜過(guò)程。此繞線(xiàn)機<span>PLC</span>控制程序采用模塊化設計，通過(guò)主程序調用子程序方式實(shí)現，各子程序分別完成不同功能。此繞線(xiàn)機<span>PLC</span>應用程序控制的總體運行流程為：<span>PLC</span>主機開(kāi)機，觸摸屏組態(tài)通信完成繞線(xiàn)工藝參數設置，程序初始化脈沖繼電器<span>M8002</span>接通，調用數據輸入子程序<span>P0</span>，調用繞線(xiàn)參數計算子程序<span>P1</span>，包膜參數計算子程序<span>P2</span>，根據檔位開(kāi)關(guān)狀態(tài)調用點(diǎn)動(dòng)檢測子程序<span>P3</span>，自動(dòng)運行子程序<span>P4</span>等。子程序中設置了進(jìn)程標識，狀態(tài)位置判斷標識，對其段、層、級計算標識進(jìn)行判斷，控制繞制狀態(tài)流程。程序采集高速計數器端口計數值，記錄已繞制匝數與總匝數機型比較判斷，確定是否進(jìn)入下一層程序，直至整個(gè)繞制過(guò)程控制的結束。繞組一層分多段，一段包含多匝線(xiàn)圈，其中一層自動(dòng)繞線(xiàn)控制程序流程如圖<span>6</span>所示。<span>PLC</span>應用程序采用兩條相對定位指令<span>DDRVI</span>，控制<span>FX-3U</span>控制單元的<span>Y0</span>、<span>Y1</span>端口輸出脈沖信號，指令相關(guān)的參數<span>D20</span>、<span>D30</span>、<span>D22</span>、<span>D32</span>由參數計算子程序中根據輸入的線(xiàn)圈繞組的規格參數計算得出，從而實(shí)現對主從兩個(gè)步進(jìn)伺服電動(dòng)機的協(xié)調驅動(dòng)控制。兩軸脈沖發(fā)送梯形圖控制程序如圖<span>7</span>所示。 </p> <p class="MsoNormal" style="text-align:center;"> <span><img width="365" height="869" src="/upload/image/20200224/20200224095699849984.png" title="兩軸脈沖發(fā)送梯形圖控制程序" align="" alt="兩軸脈沖發(fā)送梯形圖控制程序" /></span> </p> <p class="MsoNormal"> <span> </span> </p> <p class="MsoNormal"> <span>2.2</span>繞線(xiàn)機觸摸屏人機界面設計 </p> <p class="MsoNormal"> 觸摸屏是操作者對<b>繞線(xiàn)機</b>進(jìn)行操作和程序選擇的重要人機界面。觸摸屏可實(shí)現繞線(xiàn)機運行狀態(tài)的顯示，還可實(shí)現對繞線(xiàn)機的各種操作，如改變運行模式，修改運行工藝參數等功能。對此繞線(xiàn)機進(jìn)行觸摸屏界面設計如下：界面上設計提供七個(gè)標簽，分別對應七種規格線(xiàn)圈繞制程序，每種線(xiàn)圈需要設置七個(gè)工藝參數。觸摸屏與<span>PLC</span>之間通過(guò)<span>RS422</span>串行通信方式連接，通過(guò)共享地址的方式，將觸摸屏所設參數傳到<span>PLC</span>控制程序之中，并且還設計了觸控按鈕用于繞線(xiàn)機操作控制，如圖<span>8</span>所示。<span>3</span>結語(yǔ)此改進(jìn)設計的新型繞線(xiàn)機，通過(guò)校企合作方式進(jìn)行機械零部件的設計和電氣控制系統的<span>PLC</span>應用程序開(kāi)發(fā)調試，現已完成樣機研制并調試運行。通過(guò)在客戶(hù)現場(chǎng)使用實(shí)踐證明，采用此種新型繞線(xiàn)機進(jìn)行高壓互感器大型線(xiàn)圈繞制，繞線(xiàn)效率、質(zhì)量均有提高。此外，選用觸摸屏提供了友好的用戶(hù)界面，實(shí)現了可編程自動(dòng)化高精度繞線(xiàn)工藝，使得工藝參數修改、設置方便，實(shí)現了通過(guò)程序自動(dòng)控制繞制多種型號線(xiàn)圈的功能。該繞線(xiàn)機具有操作簡(jiǎn)單、自動(dòng)化程度高、運行可靠等優(yōu)點(diǎn)。 </p> </div> <div style="width:950px; text-align:right; line-height:180%;" class="news_content_back"> <a href="javascript:history.go(-1)">[返回]</a> </div> </div> <div class="otcnl72" id="bodycontent" style="text-align:left;" 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