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高頻變壓器相對于傳統(tǒng)工頻變壓器的優(yōu)點(diǎn)分析</h3>
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<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??015-07-03 09:22:00</span>
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<p><span style="font-size: 14px"> 在傳統(tǒng)的高頻變壓器設(shè)計(jì)中，由于磁心材料的限制，其工作頻率較低，一般在20kHz左右。隨著電源技術(shù)的不斷發(fā)展，電源系統(tǒng)的小型化，高頻化和高功率比已成為一個(gè)永恒的研究方向和發(fā)展趨勢。因此，研究使用頻率更高的電源變壓器是降低電源系統(tǒng)體積，提高電源輸出功率比的關(guān)鍵因素??/span></p>
<p> </p>
<p><span style="font-size: 14px"> 作為開關(guān)電源最主要的組成部分，<strong><a href="http://www.linhang.com.cn/product/">高頻變壓??/a></strong>相對于傳統(tǒng)的工頻變壓器有以下優(yōu)點(diǎn)??/span></p>
<p> </p>
<p><span style="font-size: 14px"> 利用鐵氧體材料制成的高頻變壓器具有轉(zhuǎn)換效率高、體積小巧的特點(diǎn);而傳統(tǒng)的工頻變壓器工作在50Hz下，輸出相同功率時(shí)需要較大的截面積而導(dǎo)致變壓器體積龐大，不利于電源的小型化設(shè)計(jì)，而且電源轉(zhuǎn)換效率也低于開關(guān)電源??/span></p>
<p> </p>
<p><span style="font-size: 14px"> 電腦使用的開關(guān)電源一般采用半橋式功率轉(zhuǎn)換電路，工作時(shí)兩個(gè)開關(guān)三極管輪流導(dǎo)通來產(chǎn)生100kHz的高頻脈沖波，然后通過高頻變壓器進(jìn)行降壓，輸出低電壓的交流電。在這個(gè)電路中，開關(guān)管的最大電流對電源輸出功率的大小有一定的限制(通常應(yīng)用??00W電源的MOS管體積較大，有的電源甚至使用了耐流達(dá)到10A的開關(guān)管)，而高頻變壓器各個(gè)繞組線圈的匝數(shù)比例則決定了輸出電壓的多少，由于工作在很高的頻率下，對元件質(zhì)量的要求和線路的搭配有很高的要求??/span></p>
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