3PS465.9---3PS465.9
---在相控整流電路中，若設(shè)交流電壓和電流基波分量之間的相位角為j，如忽略換流重疊角，在相控角為a時(shí)，整流裝置的相位移系數(shù)cosj與相控角a間有如下關(guān)系式：：張亮（工程師） 專線：
24小時(shí)移動(dòng)專線： 【】
cosj = cosa
交－交變頻器的輸出電壓既然由各段相控整流電壓組成，因此cosj不高，而且cosa越小，cosj也越小。無(wú)論輸出的負(fù)載性質(zhì)如何，這種相位滯后都不可避免。圖1為不同負(fù)載功率因數(shù)角y和不同電壓降系數(shù)e時(shí)，cosj的變化規(guī)律。
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