WAGO耦合器基本工作特性

1、共模抑制比很高

在WAGO光電(dian)耦(ou)合(he)器(qi)內部，由于發光管和(he)受光器(qi)之間的耦(ou)合(he)電(dian)容很小(xiao)(2pF以內)所(suo)以共模輸(shu)入電(dian)壓通過極間耦(ou)合(he)電(dian)容對輸(shu)出電(dian)流的影響(xiang)很小(xiao)，因而共模抑制比很高。

2、輸出特性

WAGO光(guang)電(dian)(dian)耦合器的(de)(de)(de)(de)(de)輸(shu)出(chu)(chu)特(te)(te)性(xing)是指(zhi)在一定(ding)(ding)的(de)(de)(de)(de)(de)發(fa)光(guang)電(dian)(dian)流(liu)IF下，光(guang)敏(min)管(guan)(guan)所加偏(pian)置電(dian)(dian)壓VCE與(yu)輸(shu)出(chu)(chu)電(dian)(dian)流(liu)IC之間(jian)的(de)(de)(de)(de)(de)關(guan)系，當IF=0時，發(fa)光(guang)二極管(guan)(guan)不發(fa)光(guang)，此時的(de)(de)(de)(de)(de)光(guang)敏(min)晶體管(guan)(guan)集(ji)電(dian)(dian)極輸(shu)出(chu)(chu)電(dian)(dian)流(liu)稱為暗電(dian)(dian)流(liu)，一般很小。當IF>0時，在一定(ding)(ding)的(de)(de)(de)(de)(de)IF作用下，所對應的(de)(de)(de)(de)(de)IC基本上與(yu)VCE無(wu)關(guan)。IC與(yu)IF之間(jian)的(de)(de)(de)(de)(de)變化成線(xian)性(xing)關(guan)系，用半導體管(guan)(guan)特(te)(te)性(xing)圖示儀(yi)測(ce)出(chu)(chu)的(de)(de)(de)(de)(de)光(guang)電(dian)(dian)耦合器的(de)(de)(de)(de)(de)輸(shu)出(chu)(chu)特(te)(te)性(xing)與(yu)普通晶體三極管(guan)(guan)輸(shu)出(chu)(chu)特(te)(te)性(xing)相(xiang)似。

3、隔離特性

1.入出間(jian)隔離電(dian)壓Vio(Isolation Voltage)

WAGO光耦合器輸入端(duan)和輸出端(duan)之(zhi)間(jian)絕緣(yuan)耐壓(ya)值。

2.入出間隔離電容Cio(Isolation Capacitance):

WAGO光耦合(he)器件輸(shu)入端(duan)和輸(shu)出端(duan)之間的電(dian)容(rong)值(zhi)

3.入出(chu)間隔離電阻Rio:(Isolation Resistance)

半導體光耦(ou)合(he)器輸入端(duan)和輸出端(duan)之間(jian)的絕緣電阻值。

4、傳輸特性:

1.電流傳輸比WAGO光電耦合器CTR(Current Transfer Radio)

輸出管的工(gong)作電(dian)壓為規定值時，輸出電(dian)流(liu)和發光二極管正向電(dian)流(liu)之比(bi)為電(dian)流(liu)傳(chuan)輸比(bi)CTR。

2.上升時(shi)間Tr (Rise Time)& 下降時(shi)間Tf(Fall Time)

WSGO光(guang)耦合器在規定工作條件下，發光(guang)二(er)極管輸(shu)入規定電流IFP的(de)脈沖(chong)(chong)(chong)波，輸(shu)出(chu)端管則輸(shu)出(chu)相(xiang)應的(de)脈沖(chong)(chong)(chong)波，從輸(shu)出(chu)脈沖(chong)(chong)(chong)前沿(yan)幅度(du)的(de)10%到(dao)90%，所需(xu)時(shi)間(jian)為(wei)脈沖(chong)(chong)(chong)上升(sheng)時(shi)間(jian)tr。從輸(shu)出(chu)脈沖(chong)(chong)(chong)后(hou)沿(yan)幅度(du)的(de)90%到(dao)10%，所需(xu)時(shi)間(jian)為(wei)脈沖(chong)(chong)(chong)下降(jiang)時(shi)間(jian)tf。

其(qi)它參數諸如(ru)工作(zuo)溫(wen)度、耗(hao)散功率等不再一(yi)一(yi)復述。

5、光電耦合(he)器可作(zuo)為線性耦合(he)器使(shi)用。

在(zai)發光(guang)(guang)二(er)極(ji)(ji)管(guan)上提供一個(ge)偏(pian)置(zhi)電(dian)(dian)(dian)流，再把信(xin)號(hao)電(dian)(dian)(dian)壓通過(guo)電(dian)(dian)(dian)阻耦合到(dao)發光(guang)(guang)二(er)極(ji)(ji)管(guan)上，這樣光(guang)(guang)電(dian)(dian)(dian)晶體(ti)管(guan)接收到(dao)的是在(zai)偏(pian)置(zhi)電(dian)(dian)(dian)流上增、減(jian)變(bian)化(hua)的光(guang)(guang)信(xin)號(hao)，其(qi)輸(shu)(shu)出電(dian)(dian)(dian)流將(jiang)隨輸(shu)(shu)入的信(xin)號(hao)電(dian)(dian)(dian)壓作線性(xing)變(bian)化(hua)。光(guang)(guang)電(dian)(dian)(dian)耦合器也可工作于開關狀態，傳輸(shu)(shu)脈沖信(xin)號(hao)。在(zai)傳輸(shu)(shu)脈沖信(xin)號(hao)時，輸(shu)(shu)入信(xin)號(hao)和(he)輸(shu)(shu)出信(xin)號(hao)之(zhi)間(jian)存(cun)在(zai)一定(ding)的延遲時間(jian)，不同結構的光(guang)(guang)電(dian)(dian)(dian)耦合器輸(shu)(shu)入、輸(shu)(shu)出延遲時間(jian)相差很大。

 想了解更多關于德國WAGO耦合器基本工作特性,點擊