村田贴片电感

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电感是一种能将电能通过磁通量的形式储存起来的被动电子元件。通常为导线卷绕的样子，当有电流通过时，会从电流流过方向的右边产生磁场。

电感值的计算公式如下所示。卷数越多，磁场越强。同时，横截面积变大，或改变磁芯都能够使磁场增强。

那么让我们来看看将交流电流过电感会发生什么变化吧。 交流电是指随时间推移电流大小和方向会发生周期性变化的电流。当交流电通过电感时，电流产生的磁场将其他的绕线切隔，因而产生反向电压，从而阻碍电流变化。特别是当电流突然增加时，和电流相反方向的，即电流减少方向的电动势会产生，来阻碍电流的增加。反之当电流减少时，则向电流增加的方向产生。