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<a href="/info/articlelist/special/power/type/5">設(shè)計(jì)應(yīng)用</a> > 三電平拓?fù)?—為什么要用三電平拓?fù)洌?/p> </div> </div> </div>   <script src="https://forum.eepw.com.cn/jscontent/wenzilian" type="text/javascript"></script>  <div class="vapaexb" id="container"> <section> <article> <h1>三電平拓?fù)?—為什么要用三電平拓?fù)洌?/h1> <div id="nspixuc" class="authorTimeSource"> <span>作者：</span> <span>時(shí)間：2024-10-29</span> <span>來源：硬件筆記本</span> <link rel="stylesheet" type="text/css"/> <span style="float:right; width:150px;margin-right:0px; text-align:right;"> <div id="hbqqqyg" class="nav0"> <ul> <li style="width:150px;"><a href="javascript:void(0);"><img src="http://www.ex-cimer.com/event/action/images/icon_add_4.png" width="20" border="0" align="absmiddle" />英飛凌汽車電子生態(tài)圈</a> <ul> <li style="width:150px;text-align:center;"><img src="http://www.ex-cimer.com/event/company/images/code_2.jpg" width="150"><br />掃碼關(guān)注<br />獲取最新最全汽車電子<br />技術(shù)方案與實(shí)用技巧</li> </ul> </li> </ul> </div> </span> <span style="float:right; width:30px;margin-right:0px; text-align:right;"><a rel="nofollow">收藏</a></span> </div> <div id="fosddai" class="hAd4_Afinal20a_back">  <iframe id='a890e388' name='a890e388' src='https://ad.eepw.com.cn/www/delivery/afr.php?zoneid=88&cb=INSERT_RANDOM_NUMBER_HERE' frameborder='0' scrolling='no' width='660' height='60'><a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=88&cb=INSERT_RANDOM_NUMBER_HERE&n=a635e61e' border='0' alt='' /></a></iframe> </div> <div style="margin-top:28px;"></div> <div id="uzdhswl" class="content" id="contentDiv" style="position:relative;"> <div id="qrgvzlx" class="ad_300x180_Afinal13_back">  <iframe id='a225770a' name='a225770a' src='https://ad.eepw.com.cn/www/delivery/afr.php?zoneid=87&cb=INSERT_RANDOM_NUMBER_HERE' frameborder='0' scrolling='no' width='300' height='200'><a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=87&cb=INSERT_RANDOM_NUMBER_HERE&n=a576c0a2' border='0' alt='' /></a></iframe> </div> <span id="contentlabels" style="font-size:14px;"><p style="box-sizing: border-box; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255); margin-top: 0px !important;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">近年來，隨著<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/光伏逆變器"><em>光伏逆變器</em></a>以及儲(chǔ)能行業(yè)的熱度持續(xù)高漲，人們對(duì)高效太陽能逆變器、PCS等功率變換的需求越來越大，但低成本、高效率的解決方案是所有廠家永恒的追求。為了實(shí)現(xiàn)這一目標(biāo)，不僅逆變器，連DCDC級(jí)的拓?fù)洌ɡ鏜PPT電路）都必須是低成本和高效的。在傳統(tǒng)的DCDC變換電路中，隔離拓?fù)浯蠹彝ǔ＿x用LLC、移相全橋等實(shí)現(xiàn)開關(guān)管的軟開關(guān)降低損耗，提升效率，而非隔離直流變換拓?fù)浯蟛糠侄疾捎脗鹘y(tǒng)的兩電平Buck或Boost拓?fù)洌蛘卟捎枚嘞嘟诲e(cuò)減小電流紋波，或者采用DCM模式實(shí)現(xiàn)部分開關(guān)管的軟開關(guān)提升效率，但是效果終究是有瓶頸的。</span></span></p>本文引用地址：<a href="http://www.ex-cimer.com/article/202410/464093.htm">http://www.ex-cimer.com/article/202410/464093.htm</a><p class="syl-page-br" style="box-sizing: border-box; margin-top: 18px; margin-bottom: 18px; padding: 0px; border: 0px; height: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><br/></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">最近幾年，越來越多的光伏產(chǎn)品開始選擇使用三電平直流變換拓?fù)洌?a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/三電平拓?fù)?><em>三電平拓?fù)?/em></a>是什么？相比于兩電平來說到底有哪些優(yōu)勢(shì)？在查閱眾多資料后，小編嘗試分期給大家進(jìn)行介紹。</span></span></p><p class="syl-page-br" style="box-sizing: border-box; margin-top: 18px; margin-bottom: 18px; padding: 0px; border: 0px; height: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><br/></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">兩電平和三電平的升壓變換器通常用于<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/光伏逆變器"><em>光伏逆變器</em></a>。相比于兩電平的方案，<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/三電平拓?fù)?><em>三電平拓?fù)?/em></a>的解決方案能夠降低半導(dǎo)體器件的電壓應(yīng)力和輸出電壓紋波，因此可以減小電感器的尺寸。由于<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/三電平拓?fù)?><em>三電平拓?fù)?/em></a>在運(yùn)行時(shí)，開關(guān)電壓電平是直流母線電壓的一半，因此可以使用開關(guān)速度更快、成本更低的低壓半導(dǎo)體。</span></span></p><p class="syl-page-br" style="box-sizing: border-box; margin-top: 18px; margin-bottom: 18px; padding: 0px; border: 0px; height: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><br/></p><h1 class="pgc-h-arrow-right" style="box-sizing: border-box; font-size: 1.056em; margin: 20px 0px; padding: 0px; border: 0px; line-height: 1.579; position: relative; font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);">1.什么是三電平拓?fù)洌?/h1><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">想要明白三電平拓?fù)?，那還得從大家熟知的兩電平拓?fù)湔f起，在之前的文章中</span></span><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; font-weight: 700; margin: 0px; padding: 0px; border: 0px;"><span style="text-decoration:underline;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(2, 30, 170); --tt-darkmode-color: #021EAA;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; background-color: rgb(255, 251, 0); --tt-darkmode-bgcolor: #D9D500;">【Monster學(xué)電子】開關(guān)電源必會(huì)拓?fù)?Boost</span></span></span></span></span></span><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;">，我們?cè)?jīng)介紹過兩電平Boost拓?fù)涞幕竟ぷ髟砗完P(guān)鍵器件參數(shù)的分析。在工作過程中，不論是Boost電路的下管還是上管，在開關(guān)管閉合時(shí)，電壓應(yīng)力都接近于0V，在斷開時(shí)，電壓應(yīng)力都接近于輸出電壓Vout，開關(guān)管源極和漏極的電壓只有兩種電壓模式，即0V和Vout，這就是為什么把傳統(tǒng)的DCDC拓?fù)浞Q為兩電平的原因。</span></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">常見的三電平的拓?fù)溆腥N，分別是二極管鉗位型、飛跨電容型、對(duì)稱式三電平拓?fù)?。本篇文章以飛跨電容型三電平拓?fù)洌ㄈ鐖D1）為例進(jìn)行分析。所謂飛跨電容，即指跨接在D1、D2中點(diǎn)和T1、T2中點(diǎn)之間的電容CFC。飛跨電容升壓拓?fù)浣Y(jié)構(gòu)通過飛跨電容（CFC）產(chǎn)生第三電壓電平，充電至輸出電壓的一半。</span></span></p><div id="vlkzsaq" class="pgc-img" style="box-sizing: border-box; margin: 0px 0px 18px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><img src="https://editerupload.eepw.com.cn/fetch/202410/24e126838630a47cb49eb561275fc61a.jpeg" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 20px; padding: 0px; border: 0px; margin-bottom: 0px !important;"><br/></p></div><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-wrap: wrap; background-color: rgb(255, 255, 255); text-align: center;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">圖1 飛跨電容型三電平拓?fù)?/span></span></p><p class="syl-page-br" style="box-sizing: border-box; margin-top: 18px; margin-bottom: 18px; padding: 0px; border: 0px; height: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-wrap: wrap; background-color: rgb(255, 255, 255); text-align: center;"><br/></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">三電平拓?fù)浣Y(jié)構(gòu)包括附加的第三電壓電平。第三電壓電平將升壓電感、開關(guān)管和二極管兩端的電壓降低到兩電平拓?fù)涞囊话搿Ｉ龎弘姼袃啥说妮^小電壓具有的優(yōu)點(diǎn)是，對(duì)于同樣要求的紋波電流，所需的電感僅為兩電平時(shí)所需電感的一半。因此減少了整個(gè)電感的體積、重量和成本。</span></span></p><p class="syl-page-br" style="box-sizing: border-box; margin-top: 18px; margin-bottom: 18px; padding: 0px; border: 0px; height: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><br/></p><h1 class="pgc-h-arrow-right" style="box-sizing: border-box; font-size: 1.056em; margin: 20px 0px; padding: 0px; border: 0px; line-height: 1.579; position: relative; font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);">2. 飛跨電容升壓拓?fù)湓敿?xì)分析</h1><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">在飛跨電容升壓變換器中，換向回路包括電容器。從換向的角度來看，電容器可以被認(rèn)為是零阻抗。它在換向回路中的主要作用是使兩個(gè)外部半導(dǎo)體相互抵消。有了這個(gè)偏移，三電平飛跨電容升壓變換器可以被視為兩個(gè)獨(dú)立的升壓變換器，其中外部的換向回路包括直流母線電容、外部二極管、飛跨電容器和外部開關(guān)。內(nèi)部換向回路包括飛跨電容器、內(nèi)部二極管和內(nèi)部開關(guān)。兩個(gè)換向回路如圖2所示。</span></span></p><div id="keeaeib" class="pgc-img" style="box-sizing: border-box; margin: 0px 0px 18px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><img src="https://editerupload.eepw.com.cn/fetch/202410/75719ec970cc34e8ee7b603d662139f8.jpeg" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 20px; padding: 0px; border: 0px; margin-bottom: 0px !important;"><br/></p></div><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-wrap: wrap; background-color: rgb(255, 255, 255); text-align: center;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">圖2 換向回路</span></span></p><p class="syl-page-br" style="box-sizing: border-box; margin-top: 18px; margin-bottom: 18px; padding: 0px; border: 0px; height: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-wrap: wrap; background-color: rgb(255, 255, 255); text-align: center;"><br/></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">一般來說，電壓電平的數(shù)量理論上是無限的，但在實(shí)際中使用了三個(gè)、四個(gè)或五個(gè)電平。n電平解決方案中的附加電平可以通過在三電平轉(zhuǎn)換器中添加額外的外部換相環(huán)路來實(shí)現(xiàn)。每個(gè)增加的升壓變換器的換向回路將類似于圖2上的綠色回路。電壓電平的數(shù)量可以計(jì)算如下：</span></span></p><div id="tnvkkdl" class="pgc-img" style="box-sizing: border-box; margin: 0px 0px 18px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><img src="https://editerupload.eepw.com.cn/fetch/202410/f04ca675f1bee4c52016fef57e3080b8.png" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 20px; padding: 0px; border: 0px; margin-bottom: 0px !important;"><br/></p></div><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">a 是換向回路的個(gè)數(shù)，飛跨電容的電壓可以用下式計(jì)算：</span></span></p><div id="ijuffrd" class="pgc-img" style="box-sizing: border-box; margin: 0px 0px 18px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><img src="https://editerupload.eepw.com.cn/fetch/202410/4a413848821580b20d0fafeada4a6a8d.jpeg" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 20px; padding: 0px; border: 0px; margin-bottom: 0px !important;"><br/></p></div><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">b 是給定的換向單元的數(shù)量，第一個(gè)回路通常指最外層的回路。</span></span></p><p class="syl-page-br" style="box-sizing: border-box; margin-top: 18px; margin-bottom: 18px; padding: 0px; border: 0px; height: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><br/></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">在三電平飛跨電容升壓變換器的工作中，有四種不同的模式。在正常運(yùn)行過程中，飛跨電容的電壓是輸出電壓的一半，并且電感電流是連續(xù)的。</span></span></p><p class="syl-page-br" style="box-sizing: border-box; margin-top: 18px; margin-bottom: 18px; padding: 0px; border: 0px; height: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><br/></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">在第一種模式中，兩個(gè)開關(guān)管（T1、T2）都斷開，電流通過兩個(gè)二極管，工作于續(xù)流模式。在這種模式下，飛跨電容的電壓不變，電感電流減小，輸出電壓增大。</span></span></p><div id="hxbqbjr" class="pgc-img" style="box-sizing: border-box; margin: 0px 0px 18px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><img src="https://editerupload.eepw.com.cn/fetch/202410/cf00a97c3b9a377b39dea88748ae94a1.jpeg" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 20px; padding: 0px; border: 0px; margin-bottom: 0px !important;"><br/></p></div><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">在第二種模式中，外側(cè)開關(guān)管（T2）導(dǎo)通，電流對(duì)飛跨電容充電，其電壓升高。</span></span></p><div id="sxmqfnz" class="pgc-img" style="box-sizing: border-box; margin: 0px 0px 18px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><img src="https://editerupload.eepw.com.cn/fetch/202410/f11b6599339d0d5db1cb1ad6d5afbe96.jpeg" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 20px; padding: 0px; border: 0px; margin-bottom: 0px !important;"><br/></p></div><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">在第三種模式中，內(nèi)側(cè)開關(guān)管（T1）導(dǎo)通（T2）斷開，電流通過飛跨電容向母線放電，飛跨電壓降低，輸出電壓增加。</span></span></p><div id="ziqbfyz" class="pgc-img" style="box-sizing: border-box; margin: 0px 0px 18px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><img src="https://editerupload.eepw.com.cn/fetch/202410/6eb88086cb051ad57c3996af72924ee4.jpeg" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 20px; padding: 0px; border: 0px; margin-bottom: 0px !important;"><br/></p></div><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">在第四種模式中，兩個(gè)開關(guān)管都導(dǎo)通。飛跨電容的電壓將保持不變，電感電流增加。</span></span></p><div id="dxmxmjk" class="pgc-img" style="box-sizing: border-box; margin: 0px 0px 18px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><img src="https://editerupload.eepw.com.cn/fetch/202410/6a29fb91a66aa6edd77c1234870837c0.jpeg" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 20px; padding: 0px; border: 0px; margin-bottom: 0px !important;"><br/></p></div><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">在連續(xù)導(dǎo)通模式（CCM）下，占空比（D）的計(jì)算方法和普通的兩電平Boost拓?fù)湟恢薄？杀硎緸椋?/span></span></p><div id="rltpiqc" class="pgc-img" style="box-sizing: border-box; margin: 0px 0px 18px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><img src="https://editerupload.eepw.com.cn/fetch/202410/8d8b5f5b7f285e5373d4959162b2dcc1.jpeg" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 20px; padding: 0px; border: 0px; margin-bottom: 0px !important;"><br/></p></div><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">飛跨電容拓?fù)渲械膬蓚€(gè)半導(dǎo)體開關(guān)管T1和T2在相位相差180°下進(jìn)行控制，但導(dǎo)通時(shí)間（占空比）相同。在D＜0.5時(shí)，T1 和 T2 永遠(yuǎn)不會(huì)同時(shí)導(dǎo)通，即不會(huì)工作在模式4。當(dāng)占空比D＞0.5時(shí)，開關(guān)管T1和T2不存在同時(shí)關(guān)斷的工作模式1，所以工作的模式取決于占空比的大小。</span></span></p><p class="syl-page-br" style="box-sizing: border-box; margin-top: 18px; margin-bottom: 18px; padding: 0px; border: 0px; height: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><br/></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">如果</span><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #000000;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; background-color: rgb(255, 251, 0); --tt-darkmode-bgcolor: #D9D500;"> < 0.5</span></span><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">，在這種情況下，不存在模式4，運(yùn)行如下：</span></span></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #000000;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; background-color: rgb(0, 252, 255); --tt-darkmode-bgcolor: #00FCFF;">…→模式1→模式2→模式1→模式3→…</span></span></span></p><p class="syl-page-br" style="box-sizing: border-box; margin-top: 18px; margin-bottom: 18px; padding: 0px; border: 0px; height: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><br/></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">如果</span><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #000000;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; background-color: rgb(255, 251, 0); --tt-darkmode-bgcolor: #D9D500;"> > 0.5</span></span><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">，運(yùn)行將是：</span></span></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #000000;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; background-color: rgb(0, 252, 255); --tt-darkmode-bgcolor: #00FCFF;">…→模式4→模式2→模式4→模式3→…</span></span></span></p><p class="syl-page-br" style="box-sizing: border-box; margin-top: 18px; margin-bottom: 18px; padding: 0px; border: 0px; height: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><br/></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">如果</span><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #000000;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; background-color: rgb(255, 251, 0); --tt-darkmode-bgcolor: #D9D500;"> = 0.5</span></span><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">：</span></span></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #000000;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; background-color: rgb(0, 252, 255); --tt-darkmode-bgcolor: #00FCFF;">…→模式2→模式3→模式2→模式3→…</span></span></span></p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">最常用的模式是當(dāng)＜0.5</span></span></p><div id="hmffbfv" class="pgc-img" 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sans-serif; font-size: 18px; text-align: justify; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; letter-spacing: 1px;"><span style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0); --tt-darkmode-color: #A3A3A3;">時(shí)間緊張，梳理不易，后續(xù)有機(jī)會(huì)將給大家繼續(xù)深入介紹三電平拓?fù)涞南嚓P(guān)知識(shí)。</span></span></p><p><br/></p></span>  <div class="zttbfnv" id="coverDiv" class="article_reg" style="width:100%;overflow:hidden;display:none;z-index:10;position:absolute;left:0;background:#fff;"> <center> <img src="https://webstorage.eepw.com.cn/images/display/reg.jpg" border="0" usemap="#Map" /> <map name="Map" id="Map"> <area shape="rect" coords="133,235,319,253" target="_blank" /> <area shape="rect" coords="132,315,319,335" /> </map> </center> </div>  <span id="fzzowtf" class="hAd8"> <br></span>   </div> </article> <div id="ukzdoli" class="clear"></div> <br/> <div id="tcvkgza" 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