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class="n_tit"> <span>文章出處??a href=""><a >深圳市晨飛電子有限公??/a></a></span><span>網(wǎng)責(zé)任編輯：<a >NSW</a></span><span>作者：<a >NSW</a></span><span>人氣??span id="cntrHits">-</span></span><span>發(fā)表時(shí)間??016-07-26 16:13:00</span> <div id="31ni06unl0" class="newchang">  <div class="31ni06unl0" id="ckepop"> <a class="jiathis jiathis_txt jtico jtico_jiathis" target="_blank">分享到：</a> <a class="jiathis_button_qzone">QQ空間</a> <a class="jiathis_button_tsina"> 新浪微博</a> <a class="jiathis_button_tqq">騰訊微博</a> <a class="jiathis_button_tsohu">搜狐微博</a> <a class="jiathis_button_t163">網(wǎng)易微博</a> <a class="jiathis_button_tools_1"></a><a class="jiathis_button_tools_2"></a> </div> <script type="text/javascript"> var jiathis_config = { "data_track_clickback": true };</script> <script type="text/javascript" src="http://v2.jiathis.com/code/jia.js?uid=899792" charset="utf-8"></script>  </div> </div> </div> </div> <div class="31ni06unl0" id="cntrBody"> <p></p> <p> <p align="left" style="margin-bottom:12.0pt;text-align:left; mso-pagination:widow-orphan" class="MsoNormal"><strong><span style="font-size:12.0pt;font-family:宋體; mso-bidi-font-family:宋體;mso-font-kerning:0pt"><a href="http://m.linhang.com.cn">高頻變壓??/a></span></strong><span style="font-size:12.0pt;font-family:宋體; mso-bidi-font-family:宋體;mso-font-kerning:0pt">的兩種基本繞法：順序繞法和三明治繞法。順序繞法一般的單輸出電源，變壓器分??span lang="EN-US">3</span>個(gè)繞組，初級(jí)繞組<span lang="EN-US">Np,</span>次級(jí)繞組<span lang="EN-US">Ns,</span>輔助電源繞組<span lang="EN-US">Nb</span>，繞制的順序是：<span lang="EN-US">Np--Ns--Nb</span>。此種繞法工藝簡(jiǎn)單，易于控制磁芯的各種參數(shù)，一致性較好，繞線成本低，適用于大批量的生產(chǎn)，但漏感稍大，而耦合電容小，<span lang="EN-US">EMI</span>比較好故適用于對(duì)漏感不敏感的小功率場(chǎng)合，一般功率小??span lang="EN-US">30~40W</span>的電源中普遍實(shí)用這種繞法??/span></p> <p align="left" style="margin-bottom:12.0pt;text-align:left; mso-pagination:widow-orphan" class="MsoNormal"> </p> <p style="margin-bottom: 12pt; text-align: center;" class="MsoNormal"><img width="316" height="316" title="ER40高頻變壓器立?? alt="ER40高頻變壓器立?? src="http://m.linhang.com.cn/UploadFiles/Product/20120703160354_67923.jpg" /></p> <p align="left" style="margin-bottom:12.0pt;text-align:left; mso-pagination:widow-orphan" class="MsoNormal"> </p> <p align="left" style="margin-bottom:12.0pt;text-align:left; mso-pagination:widow-orphan" class="MsoNormal"><span style="font-size:12.0pt;font-family:宋體; mso-bidi-font-family:宋體;mso-font-kerning:0pt">三明治繞法在電源變壓器的制作過程中是一種比較常見的基礎(chǔ)繞法。由于被夾在中間的繞組不同，三明治又分為兩種繞法，即初級(jí)夾次級(jí)，次級(jí)夾初級(jí)。下面我們來分別介紹??span lang="EN-US"><br /> <br /> </span>首先我們來看第一種常見的高頻電源變壓器繞法，即初級(jí)夾次級(jí)的繞法。這種繞法在平時(shí)的實(shí)際操作過程中也被叫做初級(jí)平均繞法??<span lang="EN-US"><br /> </span>在使用這種初級(jí)平均繞法進(jìn)行電源變壓器的繞制時(shí)，其具體繞制過程如上圖所展示的樣子，操作順序??span lang="EN-US">Np/2-Ns-Np/2-Nb</span>??/span></p> <p align="left" style="margin-bottom:12.0pt;text-align:left; mso-pagination:widow-orphan" class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt; font-family:宋體;mso-bidi-font-family:宋體;mso-font-kerning:0pt"><br /> </span><span style="font-size:12.0pt;font-family:宋體;mso-bidi-font-family:宋體; mso-font-kerning:0pt">接下來我們來看一下高頻電源變壓器的第二種三明治繞法，次級(jí)夾初級(jí)的繞法。這一繞法有時(shí)候也被叫做次級(jí)平均繞法，其繞制原理圖如下圖圖<span lang="EN-US">2</span>所示，當(dāng)使用這一繞制方法進(jìn)行電源變壓器的繞制時(shí)，繞制順序??span lang="EN-US">Ns/2-Np-Ns/2-Nb</span>。當(dāng)輸出是低壓大電流時(shí)，一般采用此種繞法居多??/span></p> <p style="text-indent:21.0pt" class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:宋體;mso-bidi-font-family:宋體;mso-font-kerning: 0pt">1</span><span style="font-size:12.0pt;font-family:宋體;mso-bidi-font-family: 宋體;mso-font-kerning:0pt">、三明治繞法可以減少變壓器的漏感，而減少漏感帶來的好處是電壓尖峰會(huì)降低，使<span lang="EN-US">MOSFET</span>的電壓應(yīng)力降??/span></p> <p style="text-indent:21.0pt" class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:宋體;mso-bidi-font-family:宋體;mso-font-kerning: 0pt">2</span><span style="font-size:12.0pt;font-family:宋體;mso-bidi-font-family: 宋體;mso-font-kerning:0pt">、改??span lang="EN-US">EMI</span>：由<span lang="EN-US">MOSFET</span>與散熱片引起的共模干擾電流也可以降低，從而改??span lang="EN-US">EMI;</span>由于在初級(jí)中間加入了一個(gè)次級(jí)繞組，所以減少了變壓器初級(jí)的層間分布電容，而層間電容的減少，就會(huì)使電路中的寄生振蕩減少，同樣可以降??span lang="EN-US">MOSFET</span>與次級(jí)整流管的電壓電流應(yīng)力，改善<span lang="EN-US">EMI</span>??/span><span lang="EN-US" style="font-size:12.0pt;font-family:宋體;mso-bidi-font-family:宋體;mso-font-kerning: 0pt"><br type="_moz" /> </span></p> <p style="text-indent:21.0pt" class="MsoNormal"> </p> <p align="left" style="margin-bottom:12.0pt;text-align:left; mso-pagination:widow-orphan" class="MsoNormal"><span id="31ni06unl0" class="con"><span style="font-size:12.0pt; font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">以上就是小編為大家總結(jié)的關(guān)??/span></span><span style="font-size:12.0pt; font-family:宋體;mso-bidi-font-family:宋體;mso-font-kerning:0pt">高頻變壓器的三明治繞??/span><span id="31ni06unl0" class="con"><span style="font-size:12.0pt;font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">的介紹，希望能夠幫到大家，如果還想了解更多的</span></span><span id="31ni06unl0" class="con"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">高頻變壓??/span></span><span id="31ni06unl0" class="con"><span style="font-size:12.0pt;font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">資訊，那就點(diǎn)??/span></span><a href="http://m.linhang.com.cn/news/"><span id="31ni06unl0" class="con"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman";color:red">高頻變壓??/span></span><span id="31ni06unl0" class="con"><span style="font-size:12.0pt;font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman";color:red">資訊</span></span></a><span id="31ni06unl0" class="con"><span 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