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電源變壓器的定義及性能解析</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
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<p><span style="font-size: 14px"> <a href="http://m.linhang.com.cn ">電源變壓??/a>的功能是功率傳送、電壓變換和絕緣隔離，作為一種主要的軟磁電磁元件，在電源技術(shù)中和電力電子技術(shù)中得到廣泛的應(yīng)用??/span></p>
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<p><span style="font-size: 14px"> 1??工作頻率變壓器鐵芯損耗與頻率關(guān)系很大，故應(yīng)根據(jù)使用頻率來設(shè)計(jì)和使用，這種頻率稱工作頻率??/span></p>
<p> </p>
<p><span style="font-size: 14px"> 2??額定功率在規(guī)定的頻率和電壓下，變壓器能長期工作，而不超過規(guī)定溫升的輸出功率??/span></p>
<p> </p>
<p><span style="font-size: 14px"> 3??額定電壓指在變壓器的線圈上所允許施加的電壓，工作時(shí)不得大于規(guī)定值??/span></p>
<p> </p>
<p><span style="font-size: 14px"> 4??電壓比指變壓器初級電壓和次級電壓的比值，有空載電壓比和負(fù)載電壓比的區(qū)別??/span></p>
<p> </p>
<p><span style="font-size: 14px"> 5 、空載電流變壓器次級開路時(shí)，初級仍有一定的電流，這部分電流稱為空載電流?？蛰d電流由磁化電流(產(chǎn)生磁??和鐵損電??由鐵芯損耗引??組成。對??0Hz電源變壓器而言，空載電流基本上等于磁化電流??/span></p>
<p> </p>
<p><span style="font-size: 14px"> 6 、空載損耗指變壓器次級開路時(shí)，在初級測得功率損耗。主要損耗是鐵芯損耗，其次是空載電流在初級線圈銅阻上產(chǎn)生的損??銅損)，這部分損耗很小??/span></p>
<p> </p>
<p><span style="font-size: 14px"> 7 、效率指次級功率P2與初級功率P1比值的百分比。通常變壓器的額定功率愈大，效率就愈高??/span></p>
<p> </p>
<p><span style="font-size: 14px"> 8 、絕緣電阻表示變壓器各線圈之間、各線圈與鐵芯之間的絕緣性能。絕緣電阻的高低與所使用的絕緣材料的性能、溫度高低和潮濕程度有關(guān)??/span></p>
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