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高頻開關(guān)電源變壓器的干擾問題及解決問題分析</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
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<p class="MsoNormal"><span style="font-size: 14px;"><span style="font-family: 宋體;">高頻<a href="http://linhang.com.cn"><strong>開關(guān)電源變壓器</strong></a>的干擾問題及解決問題有那些呢？在目前的開關(guān)電源變壓器中，都有機(jī)內(nèi)微處理器??/span><span lang="EN-US">DSP</span><span style="font-family: 宋體;">，作機(jī)內(nèi)監(jiān)控和通訊之用。微處理芯片對供電電源要求很高，要求</span> <span style="font-family: 宋體;">幅值相當(dāng)穩(wěn)定，更不能帶有較大尖峰毛刺，以免造成電磁干擾，而且要求輔助電源的交流適應(yīng)能力比整流器正常工作的范圍更廣。當(dāng)整流器接上交流輸入電時，必須是監(jiān)</span> <span style="font-family: 宋體;">控部分先正常工作，進(jìn)行自檢和各種狀況的檢測，以確定整流器能否開機(jī)；如遇極高或極低交流電壓，整流器雖已停止工作，但監(jiān)控部分仍要正常工作，保持正常??/span> <span style="font-family: 宋體;">監(jiān)控和通訊??/span></span></p>
<p class="MsoNormal" style="text-align: center;"><span style="font-size: 14px;"><span lang="EN-US"> </span><img width="304" height="304" title="EFD20高頻變壓?? alt="EFD20高頻變壓?? src="http://linhang.com.cn/UploadFiles/Product/20120702153426_83625.jpg" /></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span lang="EN-US"> </span><span lang="EN-US"><br />
</span><span style="font-family: 宋體;"> 某些電源產(chǎn)品運(yùn)行過程中曾出現(xiàn)無故復(fù)位等現(xiàn)象，在進(jìn)行大功率開關(guān)電源的輔助電源設(shè)計(jì)的時候，對其進(jìn)行分析，發(fā)現(xiàn)其輔助電源在不同交流輸入電壓、不同負(fù)載條件下存在比較多的問題：交流適應(yīng)范圍窄，負(fù)載能力低，工作波形不穩(wěn)且極不對稱，出現(xiàn)偏磁，電磁干擾極嚴(yán)重等??/span><span lang="EN-US"><br />
</span><span style="font-family: 宋體;"> </span><span lang="EN-US"><br style="mso-special-character:line-break" />
<br style="mso-special-character:line-break" />
</span></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span style="font-family: 宋體;"> 那么如何解決開關(guān)電源的干擾問題呢？</span></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span style="font-family: 宋體;">簡單的就是一只濾波電容接在兩根電源線之間而形成的輸入濾波電路，只要電容選擇適當(dāng)，就能對高頻干擾起到抑制作用。該電容的選擇主要考慮耐壓值，只要滿足功率線路的耐壓等級，并能承受可預(yù)料的電壓沖擊即可??/span></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span lang="EN-US"> </span></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span style="font-family: 宋體;">抑制輻射噪聲的有效方法就是屏蔽?？梢杂脤?dǎo)電性能良好的材料對電場進(jìn)行屏蔽，用磁導(dǎo)率高的材料對磁場進(jìn)行屏蔽。為了防止變壓器的磁場泄露，使變壓器初次級耦合良好，可以利用閉合磁環(huán)形成磁屏蔽，整個開關(guān)電源的外殼也需要有良好的屏蔽特性，接縫處要符合</span><span lang="EN-US">EMC</span><span style="font-family: 宋體;">規(guī)定的屏蔽要求。通過上述措施保證開關(guān)電源既不受外部電磁環(huán)境的干擾也不會對外部電子設(shè)備產(chǎn)生干擾??/span></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span lang="EN-US"> </span></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span style="font-family: 宋體;">以上就是小編為大家總結(jié)的關(guān)于高頻開關(guān)電源變壓器的干擾的問題的分析，以供大家參考，</span></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span style="font-family: 宋體;">這里學(xué)問比較深，不是一篇文章就能說清楚的，建議大家還是去看一本關(guān)于這方面的書吧。如果還想了解開關(guān)電源變壓器的價格，工藝等其他問題，那就點(diǎn)擊</span><a href="http://linhang.com.cn/news/"><span style="font-family: 宋體; color: red;">高頻變壓器資??/span></a><span style="font-family: 宋體;">吧！</span></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span lang="EN-US"> </span></span></p>
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