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class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_qmjpj/">汽摩及配件</a>?<a href="http://www.cdcfah.com/cp/second-qmjpj_qcaqfz/">汽車安全輔助</a>?<a href="http://www.cdcfah.com/cp/third-qcaqfz_qtqcaqyp/">其他汽車安全用品</a>?中**電子線圈誠信經(jīng)營無錫東英電子供應(yīng)</p><div id="utqprip" class="leftbox clearfix"><h1>中**電子線圈誠信經(jīng)營無錫東英電子供應(yīng)</h1><div id="xh3wo2p" class="proBig"><div id="2i2nuwn" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/dongying/637218867240517578/5400697.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="tnf8z7q" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/dongying/637218867240517578/5400697.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ujg9ak3" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>中**電子線圈誠信經(jīng)營</p><p><span>***更新：</span>2020-06-22 12:30:28</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="theyf77" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">無錫東英電子有限公司</a></p><p><span>聯(lián)系人：</span>朱淇華</p><p><span>郵箱: </span>wxdydz@163.com</p><p><span>電話: </span>13921179070</p><p><span>傳真: </span>0510_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>0510-83785478</p><p><span>地址: </span>江蘇省無錫市錫山區(qū)錫北鎮(zhèn)新壩村</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="2kgkwyf" class="page-proshow02"><p class="title">詳細說明</p><div id="8ls3e29" class="box"><p><p> 導(dǎo)致控制器三相輸出線短路時的短路電流各不相同，所以設(shè)計者應(yīng)跟據(jù)自己的實際電路和使用條件設(shè)計合理的保護時間。短路保護時間計算步驟：計算MOSFVBHET短路時允許的瞬態(tài)溫升因為控制器有可能是在正常工作時突然短路，所以我們的設(shè)計應(yīng)是基于正常工作時的溫度來計算允許的瞬態(tài)溫升。MOSFET的結(jié)點溫度可由下式計算：Tj=Tc+P×Rth(jc)其中：Tc：MOSFET表面溫度Tj：MOSFET結(jié)點溫度Rth(jc)：結(jié)點至表面的熱阻，可從元器件Dateet中查得。理論上MOSFET的結(jié)點溫度不能超過175℃，所以電機相線短路時MOSFET允許的溫升為：Trising=Tjmax-Tj=175-109=66℃。根據(jù)瞬態(tài)溫升和單脈沖功率計算允許的單脈沖時的熱阻由圖2可知，短路時MOSFET耗散的功率約為：P=Vds×I=25×400=10000W脈沖的功率也可以通過將圖二測得波形存為EXCEL格式的數(shù)據(jù)，然后通過EXCEL進行積分，中**電子線圈誠信經(jīng)營，從而得到比較精確的脈沖功率數(shù)據(jù)，中**電子線圈誠信經(jīng)營。對于MOSFET溫升計算有如下公式：Trising=P×Zθjc×Rθjc其中：Rθjc------結(jié)點至表面的熱阻，中**電子線圈誠信經(jīng)營，可從元器件Dateet中查得。Zθjc------熱阻系數(shù)Zθjc=Trising÷(P×Rθjc)Zθjc=66÷(10000×)=根據(jù)單脈沖的熱阻系數(shù)確定允許的短路時間由圖3**下面一條曲線(單脈沖)可知，對于單脈沖來說。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="中**電子線圈誠信經(jīng)營" src="https://tyunfile.71360.com/WaterMark/UploadFile/dongying/637218867240517578/5400697.png"></div><p> 故單層繞組一般只用于小容量異步電動機中MFZ1-7/DC24V/AC110V/AC220VMFJ1-3/DC24V/AC110V/AC220VMFJ1-7/DC24V/AC110V/AC220VMFB1-3YC/DC24V/AC110V/AC220VMFB1-4YC/DC24V/AC110V/AC220VMFB1-7YC/DC24V/AC110V/AC220VMFB1-10YC/DC24V/AC110V/AC220VMFZ1-3YC/DC24V/AC110V/AC220VMFZ1-4YC/DC24V/AC110V/AC220VMFZ1-7YC/DC24V/AC110V/AC220VMFZ1-10YC/DC24V/AC110V/AC220VMFJ3-18YC/DC24V/AC110V/AC220VMFJ3-27YC/DC24V/AC110V/AC220VMFJ3-54YC/DC24V/AC110V/AC220VMFZ3-22YC/DC24V/AC110V/AC220VMFZ3-37YC/DC24V/AC110V/AC220VMFZ30-90YC/DC24V/AC110V/AC220VMFJ10-27YC/DC24V/AC110V/AC220VMFZ8-37YC/DC24V/AC110V/AC220VMFZ8-90YC/DC24V/AC110V/AC220VMFB8-37YC/DC24V/AC110V/AC220VMFB8-90YC/DC24V/AC110V/AC220V。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="中**電子線圈誠信經(jīng)營" src="https://tyunfile.71360.com/WaterMark/UploadFile/dongying/637218867236201172/9538462.png"></div><p> 包括以下步驟：步驟1：根據(jù)受力分析模型選擇起吊機型號；步驟2：根據(jù)槽鋼的平衡方程選擇槽鋼支撐點位置。作為推薦，步驟1中所述根據(jù)受力分析模型選擇起吊機型號具體為：式中：q為槽鋼每米質(zhì)量kg/m，l為槽鋼長度m，m為變壓器質(zhì)量kg，g為重力加速度，f1、f2為起降臺支撐點作用力，根據(jù)f1、f2的大小選擇起吊機型號；作為推薦，步驟2中所述根據(jù)槽鋼的平衡方程選擇槽鋼支撐點位置具體為：根據(jù)實際情況選擇槽鋼的長度，然后通過以下方法選擇槽鋼支撐點；起吊變壓器過程中，槽鋼的平衡方程如下：其中，f1、f2為起降臺支撐點作用力，q為單位每米質(zhì)量，l為槽鋼長度，m為變壓器質(zhì)量，g為重力加速度，x為支撐點到槽鋼末端距離；方程中x為變量，其他參數(shù)根據(jù)槽鋼型號和變壓器規(guī)格確定，為使兩起降臺受力均衡，使抬升過程平穩(wěn)，起吊變壓器時支撐點及變壓器位置采取對稱布置，得到支撐點作用力如下：支撐點處剪力如下：變壓器懸掛點彎矩如下：槽鋼所受應(yīng)力應(yīng)滿足許用值，如下：其中，h為槽鋼腹板高度，d為槽鋼腹板寬度，wz為槽鋼抗彎截面模量，[τ]為槽鋼許用切應(yīng)力，[σ]為槽鋼許用正應(yīng)力；由上式得，支撐點到槽鋼末端距離x適宜的范圍為：由上述式子分析可得。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/349816.html</p></div></div></div></div></div><div id="udfzq2q" class="page-right twoColRt"><div id="vu2zg2g" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="ti2n8zb" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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