+1 vote

Its a question from power electronics. image

asked Apr 26, 2020 in Electrical by Akansha | 24 views

1 Answer

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Gate signal and Vbo are inversely related to each other.


In SCR,when gate signal is applied,it produces gate current which makes the second junction to forward biased,which was reverse  biased before and hence SCR gets turn on.Thus Gate signal initiates turn on process. 

Whereas Vbo is the minimum forward voltage at which SCR gets turn on. 

From the VI characteristics of SCR which i have attached below,we can see that,as we increase gate current(Ig) ,Vbo deceases gradually.image


answered Apr 27, 2020 by Hena Nayak