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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="6aplaizydtj" id="cntrBody"> <p style="margin: 0cm 0cm 0pt" class="MsoNormal"><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">近期，我們發(fā)現(xiàn)了??/span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://linhang.com.cn/product/"><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'" lang="EN-US"><span lang="EN-US"><font color="#800080">電源變壓??/font></span></span></a></span></b><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">磁芯工作在達(dá)</span><span lang="EN-US"><font face="Times New Roman">MHz</font></span><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">頻率時(shí)，剩余損耗已占支配地位，采用細(xì)晶粒鐵氧體已成功地縮小了此損耗的貢獻(xiàn)。對(duì)</span><span lang="EN-US"><font face="Times New Roman">MnZn</font></span><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">鐵氧體來說，??/span><span lang="EN-US"><font face="Times New Roman">MHz</font></span><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">頻率出現(xiàn)鐵磁諧振，形成了鐵氧體的損耗。最近有人提??/span><span lang="EN-US"><font face="Times New Roman">[5]</font></span><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，當(dāng)鐵氧體的磁導(dǎo)??mu;</span><span lang="EN-US"><font face="Times New Roman">i</font></span><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">隨晶粒尺寸減小而降低時(shí)??/span><span lang="EN-US"><font face="Times New Roman">Snoek</font></span><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">定律仍是有效的，即是說，細(xì)晶粒材料顯示出高的諧振頻率，因?yàn)榭梢杂糜诟哳l率。另外，對(duì)晶粒尺寸小到納米級(jí)的鐵氧體材料研究表明，在此頻段還應(yīng)考慮晶粒內(nèi)疇壁損耗??/span><span lang="EN-US"><o:p></o:p></span></p> <p style="margin: 0cm 0cm 0pt" class="MsoNormal"><span lang="EN-US"><o:p><font face="Times New Roman"> </font></o:p></span></p> <p style="margin: 0cm 0cm 0pt" class="MsoNormal"><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所以一臺(tái)理想的</span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://linhang.com.cn/"><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'" lang="EN-US"><span lang="EN-US"><font color="#800080">變壓??/font></span></span></a></span></b><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是相對(duì)于音頻與工頻變壓器而言的。但由于高頻的范圍太廣，所以要明確的劃分是困難的。就此，我們可將工作頻率在音頻以上的變壓器統(tǒng)稱為高頻變壓器。事實(shí)上這種叫法仍然是不夠嚴(yán)格的??/span></p> <p> </p> </div> <div id="6aplaizydtj" class="apage" id="showfenye">  <script type="text/javascript"> var pagecont=1; if(pagecont > 2) { var ss = new Cls_jsPage(1, 1, 5, "ss"); ss.setPageSE("helps-36791646301_", ".html"); ss.setPageInput("Page"); ss.setUrl(""); ss.setPageFrist("<a disabled='true'class='ob'>首頁</a>", "首頁"); ss.setPagePrev("<a disabled='true'class='ob'>上一??/a>", "上一??); ss.setPageNext("<a disabled='true'class='ob'>下一??/a>", 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