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國(guó)創(chuàng)LC濾波器的安裝及遵循原則

  LC濾波器的作用是可以對(duì)電源線中特定頻率的頻點(diǎn)或該頻點(diǎn)以外的頻率進(jìn)行有效濾除,得到一個(gè)特定頻率的電源信號(hào),或消除一個(gè)特定頻率后的電源信號(hào)。利用濾波器的選頻作用,可以濾除干擾噪聲或進(jìn)行頻譜分析。國(guó)創(chuàng)今天就說(shuō)說(shuō)濾波器的安裝及遵循原則!

  如果在高頻獲得極佳的濾波性能,那么濾波器很容易由于其PCB走線和/或?yàn)V波與未濾波分界面上導(dǎo)線的射頻泄漏而使其性能發(fā)生降級(jí)。許多工程技術(shù)人員對(duì)濾波器周?chē)纳漕l泄漏疑惑不解,濾波和未濾波走線及導(dǎo)線必須盡可能地彼此遠(yuǎn)離,而且沒(méi)有其他走線或?qū)Ь€穿過(guò)附近濾波/未濾波的邊界線,通常,對(duì)濾波器未濾干凈的殘余泄漏采用屏蔽技術(shù)是非常必要的。

  如果外部電纜濾波后進(jìn)入具有地平面的PCB板或用作射頻地的一個(gè)工業(yè)儀表面板,濾波器應(yīng)安裝在電纜進(jìn)出PCB板或儀表面板的位置上,并且要直接連接到射頻地線上。

  如果外部電纜經(jīng)濾波后進(jìn)入屏蔽機(jī)柜,濾波器應(yīng)安裝在機(jī)柜的壁上,并且要在安裝孔的周?chē)恢芘c柜壁進(jìn)行導(dǎo)電連接。隔離式濾波器是最好的選擇,但一般都比較貴而且難于安裝。市場(chǎng)上也可以采購(gòu)某些型號(hào)的濾波連接器,比如D型連接器(通常只有1nF的電容,不過(guò)磁珠、T和π型濾波器也是有效的)。

  LC濾波器時(shí)應(yīng)遵循以下原則:

  1、接地線越短越好。

  2、在電源入口處就近安裝,最好用濾波器殼體蓋住機(jī)箱上的電源線入口孔。

  3、避免濾波器附近有強(qiáng)干擾源。

  4、濾波器殼體與機(jī)箱良好搭接。

  5、濾波器輸入輸出線分開(kāi),不能并行或交叉。

  上述就是國(guó)創(chuàng)講解的濾波器的安裝及遵循原則,希望看完能夠?qū)δ兴鶐椭?,如果您想要了解更多關(guān)于濾波器的相關(guān)信息的話,歡迎在線咨詢我們國(guó)創(chuàng)客服或是撥打服務(wù)熱線029-85251919進(jìn)行咨詢,我們將竭誠(chéng)為您提供優(yōu)質(zhì)的服務(wù)!
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