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    	<div class="nyNewsDetail_Title"><h1>什么是漏感？</h1></div>
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            <span><img src="/skins/158899/images/date01.png" />更新时间：2018-03-22</span><span><img src="/skins/158899/images/hit.png" />点击次数：3710</span>
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            <p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">漏感是电机初次级在耦合的过程中漏掉的那一部份磁通!</span></span></p><p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">变压器的漏感应该是线圈所产生的磁力线不能都通过次级线圈,因此产生漏磁的电感称为漏感。</span></span></p><p>&nbsp;</p><h2>&nbsp;<span style="font-size:10px">影响漏感的几个因素</span><br />&nbsp;</h2><p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">对于固定的已经制作好的变压器,漏感与以下几个因素有关:</span></span></p><p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">K:绕组系数,正比于漏感,对于简单的一次绕组和二次绕组,取3,如果二次绕组与一次绕组交错绕制,那么,取0.85,这就是为什么推荐三明治绕制方法的原因,漏感下降很多很多,大概到原来的1/3还不到.</span></span></p><p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">Lmt:整根绕线绕在骨架上平均每匝的长度.所以,变压器设计者喜欢选择磁心中柱长的磁心.绕组越宽,漏感就越减小.把绕组的匝数控制在zui少的程度,对减小漏感非常有好处.匝数对漏感的影响是二次方的关系.</span></span></p><p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">Nx:绕组的匝数</span></span></p><p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">W:绕组宽度</span></span></p><p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">Tins:绕线绝缘厚度</span></span></p><p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">bW:制作好的变压器所有绕组的厚度.</span></span></p><p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">但是,三明治绕法带来麻烦就是寄生电容增大,效率降低.这些电容是因为统一绕组邻近线圈电位不同引起.开关转换时,这些存储于其中的能量就会用尖峰的形式释放出来的.</span></span></p><p>&nbsp;</p><h2><span style="font-family:arial,helvetica,sans-serif"><span style="font-size:10px">&nbsp; &nbsp; &nbsp; &nbsp;减少漏磁的主要方法-线圈交错绕</span></span></h2><p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">&nbsp; &nbsp; &nbsp; &nbsp; 如果是多层线圈，同理可作出更多层线圈的磁场分布图。为了减少漏感，可将初级和次级都分段。例如分成初级1/3&rarr;次级1/2&rarr;初级1/3&rarr;次级1/2&rarr;初级1/3或初级1/3&rarr;次级2/3&rarr;初级2/3&rarr;次级1/3等，zui大磁场强度降低到1/9。但是，线圈分得太多，绕制工艺复杂，线圈间间隔比例加大，充填系数降低，同时初级与次级之间的屏蔽困难。</span></span></p><p><span style="font-size:10px"><span style="font-family:arial,helvetica,sans-serif">在输出与输入电压都比较低的情况下，又要求漏感非常小，如驱动变压器，可以采用双线并绕，同时采用窗口宽高比较大的磁芯，象罐型，RM型，PM铁氧体磁性，这样在窗口中磁场强度很低，可以获得较小的漏感。</span></span></p> 
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