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id="rulhd8t" class="leftbox clearfix"><h1>昆明施耐德變頻器哪家公司維修好誠信服務(wù) 云南永樂科技變頻器公司供應(yīng)</h1><div id="yhxdevj" class="proBig"><div id="gp8txne" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/yonglekeji/637205586878105469/8687401.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="c83cj2q" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/yonglekeji/637205586878105469/8687401.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="m2bxjvr" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>云南省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>昆明施耐德變頻器哪家公司維修好</p><p><span>***更新：</span>2020-05-22 17:32:21</p><p><span id="click" >瀏覽次數(shù)：7次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="9efwcjq" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">云南永樂科技有限公司</a></p><p><span>聯(lián)系人：</span>姜先生</p><p><span>郵箱: </span>1738252619@qq.com</p><p><span>電話: </span>18987299299</p><p><span>傳真: </span>0871_63853456</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0871-63853456</p><p><span>地址: </span>昆明市官渡區(qū)昌宏路宸瑞五金機(jī)電市場B5-4號</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="mjkwnja" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="lte8ymc" class="box"><p><p style="text-indent:25px">操作人員必須熟悉變頻器的基本工作原理、功能特點(diǎn)，具有電工操作常識。在對變頻器日常維護(hù)之前，必須保證設(shè)備總電源全部切斷；并且在變頻器顯示完全消失的3-30分鐘（根據(jù)變頻器的功率）后再進(jìn)行。應(yīng)注意檢查電網(wǎng)電壓，昆明施耐德變頻器哪家公司維修好，改善變頻器、電機(jī)及線路的周邊環(huán)境，定期清楚變頻器內(nèi)部灰塵，通過加強(qiáng)設(shè)備管理較大限度地降低變頻器的故障率。變頻器的功率模塊是發(fā)熱**嚴(yán)重的器件，其連續(xù)工作所產(chǎn)生的熱量必須要及時排出，昆明施耐德變頻器哪家公司維修好，一般風(fēng)扇的壽命大約為20kh～40kh，昆明施耐德變頻器哪家公司維修好。按變頻器連續(xù)運(yùn)行折算為3～5年就要更換一次風(fēng)扇，避免因散熱不良引發(fā)故障。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="昆明施耐德變頻器哪家公司維修好" src="http://tyunfile.71360.com/UploadFile/yonglekeji/637205586878105469/8687401.png"></div><p> 變頻器用GTR的選用 </p> <p> ⑴Uceo 通常按電源線電壓U峰值的2倍來選擇。 </p> <p> Uceo≥2廠2U 在電源電壓為380V的變頻器中，應(yīng)有 Uceo≥2廠2U*380V=1074.8V，故選用 </p> <p> Uceo=1200V的GTR是適宜的。 </p> <p> ⑵Icm 按額定電流In峰值的2倍來選擇 Icm≥2廠2 In GTR是用電流信號進(jìn)行驅(qū)動的，所需驅(qū)動功率較大，故基極驅(qū)動系統(tǒng)比較復(fù)雜，并使工作頻率難以提高，這是其不足之處。現(xiàn)在我告訴大家的是MOSFET以及IGBT。在變頻器工作時，流過變頻器的電流是很大的, 變頻器產(chǎn)生的熱量也是非常大的，不能忽視其發(fā)熱所產(chǎn)生的影響。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="昆明施耐德變頻器哪家公司維修好" src="http://tyunfile.71360.com/UploadFile/yonglekeji/637205601035400391/4070147.jpg"></div><p> 1、變頻器用的GTR一般都是（復(fù)合管）模塊，其內(nèi)部有三個極分別是集電極C、發(fā)射極E和基極B。根據(jù)變頻器的工作特點(diǎn)，在晶體管旁還并聯(lián)了一個反向連接的續(xù)流二極管。又根據(jù)逆變橋的特點(diǎn)，常做成雙管模塊，甚至可以做成6管模塊。 </p> <p> 2、工作時狀態(tài) 和普通晶體管一樣，GTR也是一種放大器件，具有三種基本的工作狀態(tài)： </p> <p> ⑴放大狀態(tài) 起基本工作特點(diǎn)是集電極電流Ic的大小隨基極電流Ib而變 Ic=βIb 式中β------GTR的電流放大倍數(shù)。GTR處于放大狀態(tài)時，其耗散功率Pc較大。設(shè)Uc=200V，Rc=10Ω，β=50，Ib=200mA（0.2A）計(jì)算如下：Ic= βIb=50*0.2A=10A Uce=Uc-IcRc=(200-10*10)V=100V Pc=UceIc=100*10W=1000W=1KW </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="昆明施耐德變頻器哪家公司維修好" src="http://tyunfile.71360.com/UploadFile/yonglekeji/637205601036699219/8899629.jpg"></div></p><br /><p>文章來源地址: 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