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<p class="MsoNormal"><span style="font-size: 14px;"><span style="font-family: 宋体;">高频<a href="http://www.chenfeipower.com"><strong>开关电源变压器</strong></a>的干扰问题及解决问题有那些呢？在目前的开关电源变压器中，都有机内微处理器?/span><span lang="EN-US">DSP</span><span style="font-family: 宋体;">，作机内监控和通讯之用。微处理芯片对供电电源要求很高，要求</span> <span style="font-family: 宋体;">幅值相当稳定，更不能带有较大尖峰毛刺，以免造成电磁干扰，而且要求辅助电源的交流适应能力比整流器正常工作的范围更广。当整流器接上交流输入电时，必须是监</span> <span style="font-family: 宋体;">控部分先正常工作，进行自检和各种状况的检测，以确定整流器能否开机；如遇极高或极低交流电压，整流器虽已停止工作，但监控部分仍要正常工作，保持正常?/span> <span style="font-family: 宋体;">监控和通讯?/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高频变压? alt="EFD20高频变压? src="http://www.chenfeipower.com/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: 宋体;"> 某些电源产品运行过程中曾出现无故复位等现象，在进行大功率开关电源的辅助电源设计的时候，对其进行分析，发现其辅助电源在不同交流输入电压、不同负载条件下存在比较多的问题：交流适应范围窄，负载能力低，工作波形不稳且极不对称，出现偏磁，电磁干扰极严重等?/span><span lang="EN-US"><br />
</span><span style="font-family: 宋体;"> </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: 宋体;"> 那么如何解决开关电源的干扰问题呢？</span></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span style="font-family: 宋体;">简单的就是一只滤波电容接在两根电源线之间而形成的输入滤波电路，只要电容选择适当，就能对高频干扰起到抑制作用。该电容的选择主要考虑耐压值，只要满足功率线路的耐压等级，并能承受可预料的电压冲击即可?/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: 宋体;">抑制辐射噪声的有效方法就是屏蔽。可以用导电性能良好的材料对电场进行屏蔽，用磁导率高的材料对磁场进行屏蔽。为了防止变压器的磁场泄露，使变压器初次级耦合良好，可以利用闭合磁环形成磁屏蔽，整个开关电源的外壳也需要有良好的屏蔽特性，接缝处要符合</span><span lang="EN-US">EMC</span><span style="font-family: 宋体;">规定的屏蔽要求。通过上述措施保证开关电源既不受外部电磁环境的干扰也不会对外部电子设备产生干扰?/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: 宋体;">以上就是小编为大家总结的关于高频开关电源变压器的干扰的问题的分析，以供大家参考，</span></span></p>
<p class="MsoNormal"><span style="font-size: 14px;"><span style="font-family: 宋体;">这里学问比较深，不是一篇文章就能说清楚的，建议大家还是去看一本关于这方面的书吧。如果还想了解开关电源变压器的价格，工艺等其他问题，那就点击</span><a href="http://www.chenfeipower.com/news/"><span style="font-family: 宋体; color: red;">高频变压器资?/span></a><span style="font-family: 宋体;">吧！</span></span></p>
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