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高頻開(kāi)關(guān)電源變壓器的干擾問(wèn)題及解決問(wèn)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
id="cntrHits">-</span></span><span>發(fā)表時(shí)間??016-06-07 16:10:00</span>
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<p class="MsoNormal"><span style="font-size: 14px;"><span style="font-family: 宋體;">高頻<a href="http://www.linhang.com.cn"><strong>開(kāi)關(guān)電源變壓器</strong></a>的干擾問(wèn)題及解決問(wèn)題有那些呢？在目前的開(kāi)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(duì)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(shí)，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(cè)，以確定整流器能否開(kāi)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://www.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(guò)程中曾出現(xiàn)無(wú)故復(fù)位等現(xiàn)象，在進(jìn)行大功率開(kāi)關(guān)電源的輔助電源設(shè)計(jì)的時(shí)候，對(duì)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(wèn)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(duì)稱(chēng)，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(kāi)關(guān)電源的干擾問(wèn)題呢？</span></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span style="font-family: 宋體;">簡(jiǎn)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(duì)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(jí)，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(duì)電場(chǎng)進(jìn)行屏蔽，用磁導(dǎo)率高的材料對(duì)磁場(chǎng)進(jìn)行屏蔽。為了防止變壓器的磁場(chǎng)泄露，使變壓器初次級(jí)耦合良好，可以利用閉合磁環(huán)形成磁屏蔽，整個(gè)開(kāi)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(guò)上述措施保證開(kāi)關(guān)電源既不受外部電磁環(huán)境的干擾也不會(huì)對(duì)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(kāi)關(guān)電源變壓器的干擾的問(wèn)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(wèn)比較深，不是一篇文章就能說(shuō)清楚的，建議大家還是去看一本關(guān)于這方面的書(shū)吧。如果還想了解開(kāi)關(guān)電源變壓器的價(jià)格，工藝等其他問(wèn)題，那就點(diǎn)擊</span><a href="http://www.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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