NEWS
行業資訊
您所在的位置:
首頁 >
新聞資訊
> 行業資訊
淺析福建電容器的作用是哪些?
電容器通常簡稱其容納電荷的本領為電容,用字母C表示。
定義1:電(dian)(dian)容器,顧(gu)名思義,是(shi)‘裝電(dian)(dian)的(de)容器’,是(shi)一種容納(na)電(dian)(dian)荷的(de)器件。英文名稱:capacitor。電(dian)(dian)容器是(shi)電(dian)(dian)子設備中(zhong)(zhong)大量使用的(de)電(dian)(dian)子元件之一,廣(guang)泛應用于電(dian)(dian)路(lu)中(zhong)(zhong)的(de)隔直通交,耦合,旁路(lu),濾波(bo),調(diao)諧回路(lu), 能(neng)量轉換,控制(zhi)等(deng)方面。
定義2:電容器,任何兩個(ge)彼此絕緣且(qie)相隔很(hen)近(jin)的導體(包括導線)間(jian)都(dou)構成一(yi)個(ge)電容器。
電(dian)(dian)容器的(de)(de)(de)基(ji)本作(zuo)用就是充電(dian)(dian)與放(fang)電(dian)(dian),但由這種基(ji)本充放(fang)電(dian)(dian)作(zuo)用所延(yan)伸出(chu)來的(de)(de)(de)許(xu)(xu)多(duo)電(dian)(dian)路(lu)現(xian)象,使得電(dian)(dian)容器有(you)(you)著(zhu)種種不(bu)(bu)同(tong)(tong)的(de)(de)(de)用途,例如在(zai)電(dian)(dian)動(dong)馬達中,我(wo)們用它(ta)來產生相移(yi); 在(zai)照(zhao)相閃光燈中,用它(ta)來產生高(gao)能(neng)量的(de)(de)(de)瞬(shun)間放(fang)電(dian)(dian)等(deng)等(deng); 而在(zai)電(dian)(dian)子電(dian)(dian)路(lu)中,電(dian)(dian)容器不(bu)(bu)同(tong)(tong)性質的(de)(de)(de)用途尤多(duo),這許(xu)(xu)多(duo)不(bu)(bu)同(tong)(tong)的(de)(de)(de)用途,雖(sui)然也有(you)(you)截然不(bu)(bu)同(tong)(tong)之處,但因其作(zuo)用均來自充電(dian)(dian)與放(fang)電(dian)(dian)。
●諧振(zhen):用(yong)在(zai)LC諧振(zhen)電路中的電容器稱(cheng)為諧振(zhen)電容,LC并聯和串(chuan)聯諧振(zhen)電路中都需(xu)這種電容電路。
●旁(pang)(pang)路(lu)(lu):用(yong)在旁(pang)(pang)路(lu)(lu)電(dian)(dian)路(lu)(lu)中的(de)電(dian)(dian)容器稱為旁(pang)(pang)路(lu)(lu)電(dian)(dian)容,電(dian)(dian)路(lu)(lu)中如果需要從信號中去掉(diao)某一(yi)頻(pin)段的(de)信號,可以使(shi)用(yong)旁(pang)(pang)路(lu)(lu)電(dian)(dian)容電(dian)(dian)路(lu)(lu),根據所(suo)去掉(diao)信號頻(pin)率(lv)不同,有全頻(pin)域(yu)(所(suo)有交流信號)旁(pang)(pang)路(lu)(lu)電(dian)(dian)容電(dian)(dian)路(lu)(lu)和高頻(pin)旁(pang)(pang)路(lu)(lu)電(dian)(dian)容電(dian)(dian)路(lu)(lu)。
●自(zi)(zi)舉(ju):用(yong)(yong)在自(zi)(zi)舉(ju)電路(lu)中(zhong)的(de)(de)電容(rong)(rong)器稱為自(zi)(zi)舉(ju)電容(rong)(rong),常用(yong)(yong)的(de)(de)OTL功率(lv)放大(da)器輸(shu)出級(ji)電路(lu)采用(yong)(yong)這種(zhong)自(zi)(zi)舉(ju)電容(rong)(rong)電路(lu),以通過(guo)正反饋的(de)(de)方式(shi)少量提升(sheng)信號的(de)(de)正半周幅(fu)度。
●分(fen)頻(pin):在(zai)分(fen)頻(pin)電(dian)路中(zhong)的電(dian)容(rong)器稱為分(fen)頻(pin)電(dian)容(rong),在(zai)音箱的揚聲(sheng)(sheng)器分(fen)頻(pin)電(dian)路中(zhong),使用分(fen)頻(pin)電(dian)容(rong)電(dian)路,以(yi)使高頻(pin)揚聲(sheng)(sheng)器工(gong)作在(zai)高頻(pin)段(duan),中(zhong)頻(pin)揚聲(sheng)(sheng)器工(gong)作在(zai)中(zhong)頻(pin)段(duan),低頻(pin)揚聲(sheng)(sheng)器工(gong)作在(zai)低頻(pin)段(duan)。
●負(fu)載電(dian)容:是指與石英(ying)晶體諧振(zhen)器(qi)一起(qi)決定負(fu)載諧振(zhen)頻率的有效外界電(dian)容。負(fu)載電(dian)容常用的標準值有16pF、20pF、30pF、50pF和100pF。負(fu)載電(dian)容可以(yi)根(gen)據(ju)具體情(qing)況作適當的調(diao)整(zheng),通過調(diao)整(zheng)一般(ban)可以(yi)將諧振(zhen)器(qi)的工作頻率調(diao)到標稱值。
●中(zhong)(zhong)和(he)(he):用在中(zhong)(zhong)和(he)(he)電(dian)路中(zhong)(zhong)的(de)電(dian)容器稱為中(zhong)(zhong)和(he)(he)電(dian)容。在收音機高(gao)頻(pin)和(he)(he)中(zhong)(zhong)頻(pin)放(fang)(fang)大器,電(dian)視機高(gao)頻(pin)放(fang)(fang)大器中(zhong)(zhong),采用這種中(zhong)(zhong)和(he)(he)電(dian)容電(dian)路,以消除自激。
●定(ding)時(shi):用(yong)在定(ding)時(shi)電(dian)(dian)路(lu)中的電(dian)(dian)容(rong)(rong)器(qi)稱(cheng)為定(ding)時(shi)電(dian)(dian)容(rong)(rong)。在需要通(tong)過電(dian)(dian)容(rong)(rong)充(chong)電(dian)(dian)、放電(dian)(dian)進行時(shi)間(jian)控制的電(dian)(dian)路(lu)中使(shi)用(yong)定(ding)時(shi)電(dian)(dian)容(rong)(rong)電(dian)(dian)路(lu),電(dian)(dian)容(rong)(rong)起控制時(shi)間(jian)常(chang)數大小的作(zuo)用(yong)。
●積分(fen)(fen)(fen):用(yong)在積分(fen)(fen)(fen)電(dian)路中(zhong)的(de)電(dian)容器稱為積分(fen)(fen)(fen)電(dian)容。在電(dian)勢場掃描的(de)同(tong)步分(fen)(fen)(fen)離電(dian)路中(zhong),采用(yong)這種積分(fen)(fen)(fen)電(dian)容電(dian)路,可以從場復合同(tong)步信(xin)號(hao)中(zhong)取出場同(tong)步信(xin)號(hao)。
●微(wei)(wei)分(fen)(fen):用(yong)在微(wei)(wei)分(fen)(fen)電(dian)路(lu)(lu)中(zhong)的(de)電(dian)容器(qi)(qi)稱為微(wei)(wei)分(fen)(fen)電(dian)容。在觸發(fa)(fa)器(qi)(qi)電(dian)路(lu)(lu)中(zhong)為了得(de)(de)到(dao)尖頂觸發(fa)(fa)信號(hao),采用(yong)這種微(wei)(wei)分(fen)(fen)電(dian)容電(dian)路(lu)(lu),以從各類(lei)(主要是矩形脈沖(chong))信號(hao)中(zhong)得(de)(de)到(dao)尖頂脈沖(chong)觸發(fa)(fa)信號(hao)。
●補(bu)(bu)償:用(yong)在補(bu)(bu)償電(dian)路中的(de)(de)電(dian)容(rong)器稱為補(bu)(bu)償電(dian)容(rong),在卡座的(de)(de)低音補(bu)(bu)償電(dian)路中,使(shi)用(yong)這種低頻補(bu)(bu)償電(dian)容(rong)電(dian)路,以提升放音信號中的(de)(de)低頻信號,此外,還有(you)高(gao)頻補(bu)(bu)償電(dian)容(rong)電(dian)路。
●耦合:用(yong)在耦合電(dian)(dian)路中的電(dian)(dian)容(rong)稱為耦合電(dian)(dian)容(rong),在阻容(rong)耦合放大(da)(da)器和其他電(dian)(dian)容(rong)耦合電(dian)(dian)路中大(da)(da)量使用(yong)這種(zhong)電(dian)(dian)容(rong)電(dian)(dian)路,起隔直流通(tong)交流作用(yong)。
●濾(lv)波(bo)(bo):用(yong)在(zai)濾(lv)波(bo)(bo)電(dian)路(lu)中(zhong)的電(dian)容(rong)器(qi)稱為濾(lv)波(bo)(bo)電(dian)容(rong),在(zai)電(dian)源(yuan)濾(lv)波(bo)(bo)和各種濾(lv)波(bo)(bo)器(qi)電(dian)路(lu)中(zhong)使用(yong)這種電(dian)容(rong)電(dian)路(lu),濾(lv)波(bo)(bo)電(dian)容(rong)將一定頻段內的信(xin)號從總信(xin)號中(zhong)去除。
●退(tui)耦(ou):用(yong)在退(tui)耦(ou)電(dian)路中(zhong)的電(dian)容器(qi)(qi)稱(cheng)為(wei)退(tui)耦(ou)電(dian)容,在多級(ji)放大器(qi)(qi)的直(zhi)流(liu)電(dian)壓(ya)供給(gei)電(dian)路中(zhong)使用(yong)這種電(dian)容電(dian)路,退(tui)耦(ou)電(dian)容消除每級(ji)放大器(qi)(qi)之間的有害(hai)低(di)頻交連。
●高頻消(xiao)(xiao)振:用在高頻消(xiao)(xiao)振電(dian)路中的電(dian)容(rong)(rong)稱為高頻消(xiao)(xiao)振電(dian)容(rong)(rong),在音頻負反(fan)饋放大(da)器(qi)中,為了消(xiao)(xiao)振可能出(chu)現的高頻自激,采(cai)用這(zhe)種(zhong)電(dian)容(rong)(rong)電(dian)路,以消(xiao)(xiao)除放大(da)器(qi)可能出(chu)現的高頻嘯叫(jiao)。