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</script> <script type="text/javascript"> var OBJ_TITLE = "如何选择高频变压器的磁芯材料?"; var OBJ_ID = "223"; var MARK = "news"; var ARR_AD_MARK = ["news_detail_1", "news_detail_2", "news_detail_3"]; var SID = "0001,0002,0006"; //权限ID var AUTHORITY_ID = ""; </script> <script src="/JS/Cls_jsPage.js"></script>  <div class="content"> <div class="plc2"> 当前位置�?a href="/">首页</a> » <a href="/news/">资讯中心</a> » <a href="/News/News-0001,0002,0006.shtml"> 晨飞资讯</a> » <a href="/Article/ruhexuanzegaopinbian_1.html">如何选择高频变压器的磁芯材料?</a></div> <div class="list4nr"> <div class="n_info_con" id="printableview"> <h3> 如何选择高频变压器的磁芯材料?</h3> <div class="info_con_tit"> <div class="info_con_tit"> <div class="n_tit"> <span>文章出处�?a href=""><a href="http://cfdz.nsw888.com">深圳市晨飞电子有限公�?/a></a></span><span>网责任编辑：<a href="http://cfdz.nsw888.com">NSW</a></span><span>作者：<a href="http://cfdz.nsw888.com">NSW</a></span><span>人气�?span id="cntrHits">-</span></span><span>发表时间�?013-06-13 16:25:00</span> <div class="newchang">  <div id="ckepop"> <a href="http://www.jiathis.com/share/?uid=899792" class="jiathis jiathis_txt jtico jtico_jiathis" target="_blank">分享到：</a> <a class="jiathis_button_qzone">QQ空间</a> <a class="jiathis_button_tsina"> 新浪微博</a> <a class="jiathis_button_tqq">腾讯微博</a> <a class="jiathis_button_tsohu">搜狐微博</a> <a class="jiathis_button_t163">网易微博</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 id="cntrBody"> <p>　　�?strong>高频变压�?/strong>的设计中,损耗是设计要考虑的重�?磁芯材料是抑制损耗的一种手�?因此在设计的时候磁芯的选择是一项非常重要的事情.下面让我们一起来看看该如何来选择高频变压器的磁芯材料:</p> <p>　　一.高频变压器损耗和饱和磁通密度，三种电感电流和磁通的交变成分大小不同，应区别对待�?/p> <p>　　1.高频交流电感：例如，用于软开关电路中LC谐振电路的谐振电感，其特点是，电流只有高频交流成分，没有直流成分，磁通也是双方向磁化，Bw�?Bm，Bm取大时磁芯损耗也较大，应适当选取Bm和选用损耗小的材料。当选用磁粉心材料时�?mu;小的损耗也较小�?/p> <p>　　2.直流滤波电感：电感电流以直流电流成分为主，高频交流成分较小，通常交流成分峰值仅占直流额定电流的20%；高频损耗相对较小。为了减小体积应选用Bs较大的磁心材料，如铁粉磁心等�?/p> <p>　　3.储能电感：分为电流连续型（CCM）和不连续型（DCM）两种：连续型的储能电感如同上述直流滤波电感；不连续型的储能电感的交流电流成分与直流电流成分相当，高频交流损耗较大，比高频交流电感小些�?/p> <p>　　�?电感磁心型式尺寸的选择：电感磁心的尺寸大小与磁场能量大小有关。对于功率体积设计法，由Aw·Ac来选择，对于调整率体积设计法，由Kd来选择�?/p> <p>　　�?气隙的集中和分散。电感的磁动势（电流乘以匝数）是全部用来产生磁通的，为在磁心中产生适当的磁通密度，Bw可以从两种方案中选择�?/p> <p>　　方案一：采用通常高频变压器用的值较高的磁心材料�?mu;值的大小并不重要），磁路中加适当的集中式气隙（垫纸或纸板），以防止磁通进入饱和状态；集中气隙的杂散磁场较大�?/p> <p>　　方案二：采用低初始磁导率μi；的恒磁导率铁磁粉心环形磁心。其外形无气隙，实际上是用来黏合磁粉材料的黏合剂形成许多微小气隙、均匀地分布在磁性材料的内部，这种分布气隙磁心的杂散磁场较小；等效气隙使磁性材料等效的μi值降低。黏合剂的相对含量越多的磁心，材料的等效μi值越小。可以做成不�?mu;i值的产品，如μi�?4�?50范围内分为多种规格，以便选用�?/p> <p>　　 <br /> </p> </div> <div class="apage" id="showfenye">  <script type="text/javascript"> var pagecont=1; 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</script> <script type="text/javascript"> var OBJ_TITLE = "如何选择高频变压器的磁芯材料?"; var OBJ_ID = "223"; var MARK = "news"; var ARR_AD_MARK = ["news_detail_1", "news_detail_2", "news_detail_3"]; var SID = "0001,0002,0006"; //权限ID var AUTHORITY_ID = ""; </script> <script src="/JS/Cls_jsPage.js"></script>  <div class="content"> <div class="plc2"> 当前位置�?a href="/">首页</a> » <a href="/news/">资讯中心</a> » <a href="/News/News-0001,0002,0006.shtml"> 晨飞资讯</a> » <a href="/Article/ruhexuanzegaopinbian_1.html">如何选择高频变压器的磁芯材料?</a></div> <div class="list4nr"> <div class="n_info_con" id="printableview"> <h3> 如何选择高频变压器的磁芯材料?</h3> <div class="info_con_tit"> <div class="info_con_tit"> <div class="n_tit"> <span>文章出处�?a href=""><a href="http://cfdz.nsw888.com">深圳市晨飞电子有限公�?/a></a></span><span>网责任编辑：<a href="http://cfdz.nsw888.com">NSW</a></span><span>作者：<a href="http://cfdz.nsw888.com">NSW</a></span><span>人气�?span id="cntrHits">-</span></span><span>发表时间�?013-06-13 16:25:00</span> <div class="newchang">  <div id="ckepop"> <a href="http://www.jiathis.com/share/?uid=899792" class="jiathis jiathis_txt jtico jtico_jiathis" target="_blank">分享到：</a> <a class="jiathis_button_qzone">QQ空间</a> <a class="jiathis_button_tsina"> 新浪微博</a> <a class="jiathis_button_tqq">腾讯微博</a> <a class="jiathis_button_tsohu">搜狐微博</a> <a class="jiathis_button_t163">网易微博</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 id="cntrBody"> <p>　　�?strong>高频变压�?/strong>的设计中,损耗是设计要考虑的重�?磁芯材料是抑制损耗的一种手�?因此在设计的时候磁芯的选择是一项非常重要的事情.下面让我们一起来看看该如何来选择高频变压器的磁芯材料:</p> <p>　　一.高频变压器损耗和饱和磁通密度，三种电感电流和磁通的交变成分大小不同，应区别对待�?/p> <p>　　1.高频交流电感：例如，用于软开关电路中LC谐振电路的谐振电感，其特点是，电流只有高频交流成分，没有直流成分，磁通也是双方向磁化，Bw�?Bm，Bm取大时磁芯损耗也较大，应适当选取Bm和选用损耗小的材料。当选用磁粉心材料时�?mu;小的损耗也较小�?/p> <p>　　2.直流滤波电感：电感电流以直流电流成分为主，高频交流成分较小，通常交流成分峰值仅占直流额定电流的20%；高频损耗相对较小。为了减小体积应选用Bs较大的磁心材料，如铁粉磁心等�?/p> <p>　　3.储能电感：分为电流连续型（CCM）和不连续型（DCM）两种：连续型的储能电感如同上述直流滤波电感；不连续型的储能电感的交流电流成分与直流电流成分相当，高频交流损耗较大，比高频交流电感小些�?/p> <p>　　�?电感磁心型式尺寸的选择：电感磁心的尺寸大小与磁场能量大小有关。对于功率体积设计法，由Aw·Ac来选择，对于调整率体积设计法，由Kd来选择�?/p> <p>　　�?气隙的集中和分散。电感的磁动势（电流乘以匝数）是全部用来产生磁通的，为在磁心中产生适当的磁通密度，Bw可以从两种方案中选择�?/p> <p>　　方案一：采用通常高频变压器用的值较高的磁心材料�?mu;值的大小并不重要），磁路中加适当的集中式气隙（垫纸或纸板），以防止磁通进入饱和状态；集中气隙的杂散磁场较大�?/p> <p>　　方案二：采用低初始磁导率μi；的恒磁导率铁磁粉心环形磁心。其外形无气隙，实际上是用来黏合磁粉材料的黏合剂形成许多微小气隙、均匀地分布在磁性材料的内部，这种分布气隙磁心的杂散磁场较小；等效气隙使磁性材料等效的μi值降低。黏合剂的相对含量越多的磁心，材料的等效μi值越小。可以做成不�?mu;i值的产品，如μi�?4�?50范围内分为多种规格，以便选用�?/p> <p>　　 <br /> </p> </div> <div class="apage" id="showfenye">  <script type="text/javascript"> var pagecont=1; 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