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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>?山西電子線圈采購無錫東英電子供應(yīng)</p><div id="qaq4mqo" class="leftbox clearfix"><h1>山西電子線圈采購無錫東英電子供應(yīng)</h1><div id="w4224om" class="proBig"><div id="eiusgyw" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/dongying/637218867224033203/4399878.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="4ekao4m" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/dongying/637218867224033203/4399878.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ymay2ki" 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>山西電子線圈采購</p><p><span>***更新：</span>2020-06-19 11:35:57</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="kiy404w" 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(jī): </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="gkioei2" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="isows2c" 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(hù)時間。短路保護(hù)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℃，山西電子線圈采購，所以電機(jī)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)，山西電子線圈采購，山西電子線圈采購，然后通過EXCEL進(jìn)行積分，從而得到比較精確的脈沖功率數(shù)據(jù)。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，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="山西電子線圈采購" src="https://tyunfile.71360.com/WaterMark/UploadFile/dongying/637218867224033203/4399878.png"></div><p> 可以用于中間繼電器軟故障的檢測。下面，我們加入幾組已知是否損壞的待測中間繼電器進(jìn)行分析，待測中間繼電器具體參數(shù)如表二所示，待測1、待測2、待測3為正常中間繼電器，其余3組為存在軟故障的繼電器。表2待測中間繼電器阻抗特性參數(shù)(單位/mhz)編號待測1待測2待測3待測4待測5待測6頻率，再利用特定聚類方法進(jìn)行分類，得到的結(jié)果如圖3所示。由圖3所示的聚類結(jié)果可以看出，待測1、2、3組的數(shù)據(jù)被劃分到初始數(shù)據(jù)中的一組組成一大類，待測4、5、6組數(shù)據(jù)與初始數(shù)據(jù)中的二組組成了新的一大類，這表明待測1、2、3組的中間繼電器是正常的，待測4、5、6組的中間繼電器是存在軟故障的，與實際情況相符，完成了軟故障的檢測。在將故障組的組數(shù)減少后，得到的結(jié)果如圖4所以，仍然能夠檢測出存在軟故障的中間繼電器。以上實驗結(jié)果表明，本文提出的基于中間繼電器線圈高頻阻抗特性的繼電器軟故障檢測方法是完全實際操作和運用的，有很大的使用價值，可以應(yīng)用于中間繼電器的軟故障檢測，能在中間繼電器的定期維護(hù)中有效的檢測出存在軟故障的器件，避免發(fā)展為硬故障給生產(chǎn)生活造成損失，為生產(chǎn)生活提供便利。同時，為了提高軟故障檢測精度，可以增加初始的對比樣本組數(shù)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山西電子線圈采購" src="https://tyunfile.71360.com/WaterMark/UploadFile/dongying/637218867222490234/1694555.png"></div><p> 所述凸塊3a卡入凹槽內(nèi)。裝配時，將鐵芯3裝配在鐵殼1的底板上，由于凸塊3a和凹槽的定位作用，可防止鐵芯3發(fā)生轉(zhuǎn)動，更便于電磁線圈總成的安裝。所述鐵芯3與鐵殼1的底板之間設(shè)置有絕緣片10；所述鐵芯3的頂面上均布有若干個收納孔4，工作時，電磁鐵的頂面與制動鼓難免發(fā)生摩擦而產(chǎn)生碎屑，這些碎屑則被收納在收納孔4內(nèi)。所述線圈骨架11套在鐵芯3上；所述鐵芯3及電磁線圈總成外部的鐵殼1內(nèi)腔中注塑有pps填充物2。所述鐵芯3的中心設(shè)有裝配孔，所述鐵殼1的底板上設(shè)有中心孔；所述鐵芯3的裝配孔與鐵殼1的中心孔形狀、尺寸相對應(yīng)，且上下對齊形成注塑通孔；所述注塑通孔的前、后側(cè)面為弧形面，左、右側(cè)面為平面。在該注塑通孔內(nèi)注塑有與其形狀尺寸相匹配的尼龍芯7，所述尼龍芯7開設(shè)有軸向的插孔8，所述插孔8為矩形孔，呈45°傾斜，與制動臂末端的折彎部位相匹配，安裝使用時，制動臂末端的折彎部位插接在插孔8內(nèi)。所述尼龍芯7底端的周邊設(shè)置有向外延伸的凸緣7a，所述鐵殼1中心的中心孔底口周邊設(shè)有與凸緣7a相對應(yīng)的卡臺，所述凸緣7a與卡臺對應(yīng)卡緊。這種結(jié)構(gòu)設(shè)計，可防止尼龍芯7從注塑通孔內(nèi)脫出，從而降低故障率。以上*為本實用新型的實施方式。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/313162.html</p></div></div></div></div></div><div id="62qqcsg" class="page-right twoColRt"><div id="sg4u0y4" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="q4mayea" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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