本公司供應(yīng)全新羅克韋爾1398-DDM-150伺服驅(qū)動(dòng)器ALLEN BRADLEY,價(jià)格優(yōu)惠,快速交貨,
型號
:固原AB羅克韋爾伺服驅(qū)動(dòng)器2098-DSD-HV100-SE廠家
Allen Bradley 1398-DDM-009-DN
Allen Bradley 1398-DDM-005X-NV
Allen Bradley 1398-DDM-005X-DN
Allen Bradley 1398-DDM-009X
Allen Bradley 1398-DDM-019-DN
Allen Bradley 1398-DDM-009X-DN
Allen Bradley 1398-DDM-005X
Allen Bradley 1398-DDM-005-DN
Allen Bradley 1398-DDM-005
Allen Bradley 1398-DDM-075X
Allen Bradley 1398-DDM-075
Allen Bradley 1398-DDM-010X
Allen Bradley 1398-DDM-010
Allen Bradley 1398-DDM-150
Allen Bradley 1398-DDM-020X
Allen Bradley 1398-DDM-020
Allen Bradley 1398-DDM-030X
Allen Bradley 1398-DDM-030
Allen Bradley 1398-DDM-019X-DN
Allen Bradley 1398-DDM-019X
Allen Bradley 1398-DDM-150X
Allen Bradley 1398-DDM-019
Allen Bradley 1398-DDM-009
:固原AB羅克韋爾伺服驅(qū)動(dòng)器2098-DSD-HV100-SE廠家二極管從正向?qū)ǖ浇刂褂幸粋€(gè)反向過程在上圖所示的硅二極管電路中加入一個(gè)如下圖所示的輸入電壓。在0―t1時(shí)間內(nèi),輸入為+VF,二極管導(dǎo)通,電路中有電流流通。設(shè)VD為二極管正向壓降(硅管為0.7V左右),當(dāng)VF遠(yuǎn)大于VD時(shí),VD可略去不計(jì),則在t1時(shí),V1突然從+VF變?yōu)?VR。在理想情況下,二極管將立刻轉(zhuǎn)為截止,電路中應(yīng)只有很小的反向電流。但實(shí)際情況是,二極管并不立刻截止,而是先由正向的IF變到一個(gè)很大的反向電流IR=VR/RL,這個(gè)電流維持一段時(shí)間tS后才開始逐漸下降,再經(jīng)過tt后,下降到一個(gè)很小的數(shù)值0.1IR,這時(shí)二極管才進(jìn)人反向截止?fàn)顟B(tài),如下圖所示。