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</script> <section class="proshowParameter"> <table style=" margin-bottom:20px;"> <tbody> <tr><th>品牌</th><td>Siemens/西門(mén)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(mén)子觸摸維修銷(xiāo)售服務(wù)</th><td>TP1500/1200/OP50</td> <th></th><td></td></tr> </tbody> </table> </section><p><strong>西門(mén)子觸摸屏控制顯示屏維修*OP77B</strong></p><p><strong>西門(mén)子觸摸屏控制顯示屏維修*OP77B</strong></p><p><span style=";font-family:Calibri;font-size:14px"><span style="font-family:宋體">過(guò)熱故障</span> 故障信息顯示為<span style="font-family:Calibri">“over tem- perature"</span><span style="font-family:宋體">，是因?yàn)樽冾l器的散熱溫度太高。變頻器的發(fā)熱主要是逆變器件引起的，逆變器件也是變頻器中最重要而又最脆弱的部件，所以用來(lái)測(cè)溫的溫度傳感器</span><span style="font-family:Calibri">(ntc)</span><span style="font-family:宋體">也裝在逆變器件的上半部分。當(dāng)溫度超過(guò)</span><span style="font-family:Calibri">60℃</span><span style="font-family:宋體">時(shí)，變頻器通過(guò)一個(gè)信號(hào)繼電器來(lái)預(yù)報(bào)警；當(dāng)達(dá)到 </span><span style="font-family:Calibri">70℃</span><span style="font-family:宋體">時(shí)，變頻器自動(dòng)停機(jī)，來(lái)進(jìn)行自我保護(hù)。過(guò)熱一般是五種情況引起：</span></span></p><p><span style=";font-family:Calibri;font-size:14px"> </span></p><p><span style=";font-family:Calibri;font-size:14px"><span style="font-family:宋體">（</span><span style="font-family:Calibri">1</span><span style="font-family:宋體">）環(huán)境溫度高。有的車(chē)間環(huán)境溫度高，離控制室距離太遠(yuǎn)，為節(jié)省電纜和易于現(xiàn)場(chǎng)操作，只好將變頻器安裝在車(chē)間現(xiàn)場(chǎng)。這時(shí)可將變頻器的入風(fēng)口加冷氣管道，來(lái)幫助散熱。</span></span></p><p><span style=";font-family:Calibri;font-size:14px"> </span></p><p><span style=";font-family:Calibri;font-size:14px"><span style="font-family:宋體">（</span><span style="font-family:Calibri">2</span><span style="font-family:宋體">）風(fēng)扇故障。變頻器的排風(fēng)風(fēng)機(jī)是一個(gè)</span><span style="font-family:Calibri">24v</span><span style="font-family:宋體">的直流電機(jī)，若出現(xiàn)風(fēng)機(jī)軸承損壞或線(xiàn)圈燒壞，風(fēng)機(jī)不轉(zhuǎn)，即可引起變頻器過(guò)熱。</span></span></p><p><span style=";font-family:Calibri;font-size:14px"> </span></p><p><span style=";font-family:Calibri;font-size:14px"><span style="font-family:宋體">（</span><span style="font-family:Calibri">3</span><span style="font-family:宋體">）散熱片太臟。在變頻器的逆變器的背后裝有鋁片散熱裝置，運(yùn)行時(shí)間長(zhǎng)以后，由于靜電的作用，外面會(huì)覆蓋灰塵，嚴(yán)重影響散熱器的效果。所以要定時(shí)吹掃和清理。</span></span></p><p><span style=";font-family:Calibri;font-size:14px"> </span></p><p><span style=";font-family:Calibri;font-size:14px"><span style="font-family:宋體">（</span><span style="font-family:Calibri">4</span><span style="font-family:宋體">）負(fù)載過(guò)載。變頻器所帶負(fù)載長(zhǎng)時(shí)間過(guò)載，引起發(fā)熱。這時(shí)要檢查電動(dòng)機(jī)、傳動(dòng)機(jī)構(gòu)和所帶負(fù)載。</span></span></p><p><span style=";font-family:Calibri;font-size:14px"> </span></p><p><span style=";font-family:Calibri;font-size:14px"><span style="font-family:宋體">（</span><span style="font-family:Calibri">5</span><span style="font-family:宋體">）溫度傳感器故障。 </span><span style="font-family:Calibri">ntc</span><span style="font-family:宋體">即一個(gè)負(fù)的溫度控制器，它的阻值隨著溫度升高而降低。這種情況比較少見(jiàn)。</span></span></p><p><span style=";font-family:Calibri;font-size:14px">2 <span style="font-family:宋體">逆變器件故障西門(mén)子變頻器采用的逆變器件是絕緣柵雙極性晶體管</span><span style="font-family:Calibri">-igbt</span><span style="font-family:宋體">，它的控制特點(diǎn)是輸入阻抗高，柵極電流很小，故驅(qū)動(dòng)功率小，只能工作在開(kāi)關(guān)狀態(tài)，不能工作在放大狀態(tài)。它的開(kāi)關(guān)頻率可達(dá)到很高，但抗靜電性能較差</span></span></p><p><br/></p> </div> <div id="iiwkucumui2k" class="lyNyProDetail_ConTit" id="cpzx"><p>產(chǎn)品咨詢(xún)</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" type="text/javascript"></script> <a name="order" id="order"></a> <div id="iiwkucumui2k" class="ly_msg" id="ly_msg"> <form method="post" name="form2" id="form2"> <h3>留言框 </h3> <ul> <li> <h4 class="xh">產(chǎn)品：</h4> <div id="iiwkucumui2k" class="msg_ipt1"><input 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