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鋁質電解電容器的用途

1．隔(ge)直流：作用是阻止直流通(tong)(tong)過而(er)讓交流通(tong)(tong)過。

2．旁路(lu)（去耦）：為交流電路(lu)中(zhong)某些(xie)并(bing)聯的元件提供(gong)低阻抗通路(lu)。

3．耦合：作為兩(liang)個電(dian)路之間的連接(jie)，允許交流信號(hao)通過并傳輸(shu)到下一級電(dian)路

4．濾波：這個對(dui)DIY而言很重要，顯卡(ka)上的電容基本都是這個作(zuo)用。

5．溫度補(bu)償(chang)：針對其它元件(jian)對溫度的適應性不夠帶來的影響，而進行(xing)補(bu)償(chang)，改善(shan)電(dian)路(lu)的穩定性。

6．計(ji)時(shi)：電容器與電阻器配(pei)合使(shi)用，確定電路的時(shi)間(jian)常(chang)數，時(shi)間(jian)常(chang)數t=RC。

7．調(diao)諧：對與頻率相關的(de)電路進行系統調(diao)諧，比(bi)如手機(ji)、收音(yin)機(ji)、電視(shi)機(ji)。

8．整(zheng)流：在預定的時間開(kai)或者關半閉導(dao)體開(kai)關元件。

9．儲(chu)(chu)能(neng)：儲(chu)(chu)存(cun)電能(neng)，用于必須要的時候釋放。例如相機閃光燈(deng)，加熱設(she)備等(deng)等(deng)。

電容器(qi)的壽命

電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)容(rong)(rong)在電(dian)(dian)(dian)路中實(shi)際(ji)要(yao)(yao)承受(shou)的(de)電(dian)(dian)(dian)壓(ya)不能超(chao)過(guo)它的(de)耐壓(ya)值。在濾(lv)波電(dian)(dian)(dian)路中，電(dian)(dian)(dian)容(rong)(rong)的(de)耐壓(ya)值不要(yao)(yao)小于交流(liu)有效值的(de)1.42倍。使(shi)用(yong)電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)容(rong)(rong)的(de)時(shi)候，還要(yao)(yao)注意正負(fu)極不要(yao)(yao)接反。不同電(dian)(dian)(dian)路應該(gai)選(xuan)用(yong)不同種類的(de)電(dian)(dian)(dian)容(rong)(rong)。揩振回路可以(yi)選(xuan)用(yong)云母(mu)、高頻陶(tao)瓷(ci)電(dian)(dian)(dian)容(rong)(rong)，隔直流(liu)可以(yi)選(xuan)用(yong)紙介、滌綸、云母(mu)、電(dian)(dian)(dian)解(jie)、陶(tao)瓷(ci)等(deng)電(dian)(dian)(dian)容(rong)(rong)，濾(lv)波可以(yi)選(xuan)用(yong)電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)容(rong)(rong)，旁路可以(yi)選(xuan)用(yong)滌綸、紙介、陶(tao)瓷(ci)、電(dian)(dian)(dian)解(jie)等(deng)電(dian)(dian)(dian)容(rong)(rong)。電(dian)(dian)(dian)容(rong)(rong)在裝入電(dian)(dian)(dian)路前(qian)要(yao)(yao)檢查它有沒有短路、斷路和(he)漏電(dian)(dian)(dian)等(deng)現象(xiang)，并(bing)且核(he)對它的(de)電(dian)(dian)(dian)容(rong)(rong)值。安裝的(de)時(shi)候，要(yao)(yao)使(shi)電(dian)(dian)(dian)容(rong)(rong)的(de)類別、容(rong)(rong)量、耐壓(ya)等(deng)符號(hao)容(rong)(rong)易看到，以(yi)便核(he)實(shi)。