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晨飛資訊</a> » <a href="/Article/guanyukaiguandianyua_1.html">關(guān)于開關(guān)電源變壓器的設(shè)計(jì)要??/a></div>
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關(guān)于開關(guān)電源變壓器的設(shè)計(jì)要??/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??014-05-30 09:09:00</span>
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<p> <span style="font-size: 16px">開關(guān)電源變壓器它跟一般的器件是一樣的，在應(yīng)急工作的時(shí)候能夠?qū)⒍鄠€(gè)變壓器在一定的條件下進(jìn)行串聯(lián)使用。變壓器功率滿足要求的時(shí)候，而沒有合適的電壓的話?？梢詫蓚€(gè)或者是多個(gè)變壓器串聯(lián)使用。倘若在電壓滿足的條件下，但是變壓器的功率又不夠時(shí)，也可以將兩個(gè)或者是多個(gè)變壓器并聯(lián)使用，以滿足電路供電要求??/span></p>
<p> </p>
<p><span style="font-size: 16px"> </span><strong><a href="http://m.cmqp.com.cn/product/"><span style="font-size: 16px">開關(guān)電源變壓器</span></a></strong><span style="font-size: 16px">是由電感線圈構(gòu)成的，所以完全遵循電感器的運(yùn)算規(guī)則，可以把電源變壓器初級串聯(lián)，也可以在輸出的次級串聯(lián)，現(xiàn)將四種情況分別介紹如下：</span></p>
<p> </p>
<p><span style="font-size: 16px"> 1.電源變壓器的次級串聯(lián)??電源變壓器的次級串聯(lián)是在單個(gè)功率滿足情況??而次級輸出電壓不滿足時(shí)將兩個(gè)或多個(gè)變壓器的組合。如兩個(gè)變壓器的初級輸入??20V,次級輸出??8V??如要給負(fù)載供33V電壓,則可以將兩個(gè)變壓器的次級串聯(lián)起來應(yīng)用。電源變壓器的次級串聯(lián)也是很容易??不同的次級輸出只要保證單個(gè)變壓器功率的條件下也是可以將其次級串聯(lián)應(yīng)用的。在理想狀況下多個(gè)變壓器的初級輸入電壓相同時(shí),總輸出計(jì)算式為：V??V初單/(V1??V2??……Vn????/span></p>
<p> </p>
<p><span style="font-size: 16px"> 2.變壓器的初級并聯(lián)。這種情況是我們生活中常見的實(shí)例,多個(gè)不同供電的老式彩電中的遙控變壓器和主變壓器(電源開關(guān)變壓器)均屬于變壓器初級的并聯(lián)??/span></p>
<p> </p>
<p><span style="font-size: 16px"> 3.變壓器的次級并聯(lián)。電源變壓器的次級并聯(lián)是在單個(gè)變壓器次級輸出電壓相同而單個(gè)功率不能滿足的情況下的應(yīng)用。其應(yīng)用是將多個(gè)變壓器的次級電流疊加,以滿足負(fù)載的功率需要。電源變壓器的次級并??可使輸出功率為多個(gè)變壓器功率之和。電源變壓器的串并聯(lián)應(yīng)用是不分線性電源電路和電路的。在以前的線性電源電路中,次級串聯(lián)的應(yīng)用實(shí)例更多些,比如電視機(jī)中的行逆程變壓??就是運(yùn)用了變壓器次級的串聯(lián)。現(xiàn)在的大功率開關(guān)電源中,次級并聯(lián)的應(yīng)用要多些,如上百瓦的開關(guān)電源中常將變壓器的次級并聯(lián),以增大功率。電源變壓器的串并聯(lián)應(yīng)用時(shí)要注意以下幾點(diǎn)??/span></p>
<p> </p>
<p><span style="font-size: 16px"> (1)電源變壓器在串并聯(lián)時(shí)要注意變壓器的同名端,串聯(lián)應(yīng)用時(shí)要順串而不能反??并聯(lián)使用時(shí)要同名端與同名端相??否則就會燒毀變壓器??/span></p>
<p> </p>
<p><span style="font-size: 16px"> (2)以上計(jì)算只是理想算法,而實(shí)際上在它們串并聯(lián)后的單個(gè)變壓器損耗是非常大的。每個(gè)電源變壓器的次級輸出電壓會比上式計(jì)算結(jié)果低的??/span></p>
<p> </p>
<p><span style="font-size: 16px"> (3)不同??/span><span style="font-size: 16px">級輸??如要并聯(lián)使用,最好在穩(wěn)壓后進(jìn)??且并聯(lián)電壓是取變壓器輸出中最低的電壓值。次級串聯(lián)應(yīng)用時(shí),可以是次級直接串??也可以在穩(wěn)壓后再串聯(lián)??/span></p>
<p> </p>
<p><span style="font-size: 16px"> (4)電源電路中的共地是必須的。只有在一個(gè)參考點(diǎn)的條件下才能進(jìn)行電位比較和電壓計(jì)算??/span></p>
<p> </p>
<p><span style="font-size: 16px"> 4.電源變壓器的初級串聯(lián)。在變壓器計(jì)算式中有一個(gè)常數(shù)N稱為匝數(shù)??它是初級匝數(shù)與次級匝數(shù)之??初次級電壓比關(guān)系為N,而初次級電流比關(guān)系為1/N。而這種情況是在單個(gè)變壓器的次級電壓高于成倍用電器電源使用情況??可以將兩個(gè)或多個(gè)變壓器初級串聯(lián)使用。而如再將兩個(gè)次級串聯(lián)就沒有多大使用價(jià)值了。在此情況下,只要保證單個(gè)變壓器的功率要求,則次級輸出電壓不一定相??它的輸出電壓計(jì)算為：V??(V1??V2??……Vn??/Vn??/span></p>
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