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$(this).addClass('none'); }else{ $(this).removeClass('none'); } }); } </script> <section class="proshowParameter"> <table style=" margin-bottom:20px;"> <tbody> <tr><th>品牌</th><td>Siemens/西門子</td><th>應(yīng)用領(lǐng)域</th><td>化工,石油,能源,印刷包裝,紡織皮革</td></tr><tr><th>西門子觸摸屏白屏維修</th><td>TP1500/1200/OP50</td> <th></th><td></td></tr> </tbody> </table> </section><p><strong>西門子觸摸屏運行一段時間白屏OP15維修</strong></p><p><strong>西門子觸摸屏運行一段時間白屏OP15維修</strong></p><p><span style=";font-family:Calibri;font-size:14px"><span style="font-family:宋體">制動電路由制動電阻</span><span style="font-family:Calibri">RB</span><span style="font-family:宋體">及開關(guān)管</span><span style="font-family:Calibri">VB</span><span style="font-family:宋體">構(gòu)成，主要作用是用于消耗電動機反饋回來的能量，避免過高的泵升電壓損壞變頻器?？滴滞ㄓ眯?/span><span style="font-family:Calibri">G/P</span><span style="font-family:宋體">系列變頻器根據(jù)功率等級的不同，所選用的</span><span style="font-family:Calibri">IGBT</span><span style="font-family:宋體">主要有歐派克，三菱，東芝等不同品牌，變頻器功率在以下的機型主電路主要采用集整流，逆變，制動電路和溫度檢測為一體的七單元模塊構(gòu)成，</span><span style="font-family:Calibri">22kW</span><span style="font-family:宋體">及以上的機型采用整流模塊和三路兩單元逆變模塊構(gòu)成。西門子觸摸屏</span><span style="font-family:Calibri">OP27</span><span style="font-family:宋體">維修電壓畸變在弱電源的情況下更加嚴(yán)重，這種干擾的特征是會對使用同一個電網(wǎng)的設(shè)備形成干擾，而與設(shè)備與變頻器之間的距離無關(guān)。由于負(fù)載電壓為脈沖狀，因此變頻器從電網(wǎng)吸取電流也是脈沖狀，這種脈沖電流中包含了大量的高頻成分，形成射頻干擾，這種干擾的特征是會對使用同一個電網(wǎng)的儀表形成干擾，而與儀表與變頻器之間的距離無關(guān)。射頻輻射干擾來自變頻器的輸入電纜和輸出電纜。變頻器的輸入輸出電纜上有射頻干擾電流時，由于電纜相當(dāng)于天線，必然會產(chǎn)生電磁波輻射，產(chǎn)生輻射干擾。變頻器輸出電纜上傳輸?shù)?/span><span style="font-family:Calibri">PWM</span><span style="font-family:宋體">電壓，同樣包含豐富的高頻的成分，會產(chǎn)生電磁波輻射，形成輻射干擾。輻射干擾的特征是，當(dāng)其他電子設(shè)備靠近變頻器時，干擾現(xiàn)象變得嚴(yán)重。變頻器維修學(xué)習(xí)方法有很多，但方向不對努力白費，所以抓住方向很重要，為了讓大家更快的掌握變頻器維修知識，小編提供變頻器維修培訓(xùn)的十種學(xué)習(xí)方法：</span><span style="font-family:Calibri">1</span><span style="font-family:宋體">，報警參數(shù)檢查法：所有的變頻器都以不同的方式給出故障指示，對于維修者來說是非常重要的信息。</span></span></p><p><span style=";font-family:Calibri;font-size:14px">IGBT<span style="font-family:宋體">的</span><span style="font-family:Calibri">GE</span><span style="font-family:宋體">間的電壓大約為</span><span style="font-family:Calibri">-6V</span><span style="font-family:宋體">左右，</span><span style="font-family:Calibri">IGBT</span><span style="font-family:宋體">被牢牢，處于截止?fàn)顟B(tài)。</span><span style="font-family:Calibri">1.</span><span style="font-family:宋體">若上臂光耦</span><span style="font-family:Calibri">A3120</span><span style="font-family:宋體">內(nèi)部驅(qū)動對管的上管擊穿，上臂</span><span style="font-family:Calibri">IGBT</span><span style="font-family:宋體">的</span><span style="font-family:Calibri">GE</span><span style="font-family:宋體">間的電壓就為</span><span style="font-family:Calibri">15V</span><span style="font-family:宋體">左右，</span><span style="font-family:Calibri">IGBT</span><span style="font-family:宋體">處于導(dǎo)通狀態(tài)，若下臂的</span><span style="font-family:Calibri">IGBT</span><span style="font-family:宋體">被正常觸發(fā)，加在上下</span><span style="font-family:Calibri">IGBT</span><span style="font-family:宋體">模塊的直流母線</span><span style="font-family:Calibri">P1</span><span style="font-family:宋體">對</span><span style="font-family:Calibri">N</span><span style="font-family:宋體">通過上下模塊短路，而致使模塊燒毀。</span><span style="font-family:Calibri">2.</span><span style="font-family:宋體">若上下臂光耦都損壞，就會造成通電瞬間模塊炸裂。根據(jù)上面的分析，我們不難找出模塊燒毀的根源。我們手里有一份正確的圖紙，再借助*的儀器，很快就能修復(fù)模塊燒毀這類故障。若想做到芯片級維修，必須具備深厚的模擬、數(shù)字電路理論基礎(chǔ)，熟悉計算機電路，能根據(jù)電路板畫出正確的線路圖，這是的基礎(chǔ)。還要具備將復(fù)雜問題簡單化的能力。</span></span></p><p><br/></p> </div> <div id="iiwkucumui2k" class="lyNyProDetail_ConTit" id="cpzx"><p>產(chǎn)品咨詢</p></div> <div id="iiwkucumui2k" class="ly_msg"> <link rel="stylesheet" type="text/css" href="/css/MessageBoard_style.css"> <script language="javascript" src="/skins/Scripts/order.js?v=20210318" 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