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一直為全球客戶提供最可靠的電感器配套解決方案

電感基本知識

2018-02-24

問:什么是電感,電感的作用什么?

答:電感器(Inductor)是能夠把電能轉化為磁能而存儲起來的元件。電感器的結構類似于變壓器,但只有一個繞組。電感器在沒有電流通過的狀態下,電路接通時它將試圖阻礙電流流過它;在有電流通過的狀態下,電路斷開時它將試圖維持電流不變。
電感器在電路中主要起到濾波、振蕩、延遲、陷波等作用,還有篩選信號、過濾噪聲、穩定電流及抑制電磁波干擾等作用。電感在電路最常見的作用就是與電容一起,組成LC濾波電路,有“通直流,阻交流”的功能。


問:電感的單位是什么,要怎么換算?

答:1、電感在電路中的符號:L;

         2、電感單位:亨(H)、毫亨(mH)、微亨(μH);

         3、換算關系為:1H=10^3mH=10^6μH=10^9nH;

  

問:電感的公差怎么表示?

答:電感公差通常用字母表示,誤差值為20%用M表示;誤差值為10%用K表示;誤差值為5%用J表示;誤差值為1%用F表示。如:100M,即為10μH,誤差20%。電感的誤差計算,電感在電路中的最大允許偏差是指電感器上標稱的電感量與現實電感的允許誤差值。


問:貼片電感的磁芯通常有哪些?

答:常見的貼片類電感磁芯有: 錳鋅鐵氧體、鎳鋅鐵氧體、磁粉芯等。


問:電感主要有哪些分類?

答:按照工作頻率分類:分為高頻電感、中頻電感、低頻電感

      按結構分類:固定電感、可調電感

      按作用分類:濾波電感、阻流電感、振蕩電感、隔離電感等

      按封裝形式分類:貼片電感、插件電感

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