Question

Pulse gating is suitable for

(a) R loads only

(b) R and RL loads

(c) RL loads only

(d) all types of loads

I have been asked this question during an interview.

The above asked question is from AC Voltage Controllers-3 topic in division Voltage Controllers of Power Electronics

Answer 1

Correct choice is (a) R loads only

The best I can explain: In RL loads with pulse gating, the incoming SCR may be fired during the interval when it is reversed biased by the outgoing SCR, thus it won’t get turn on even after the outgoing SCR is not reveres basing the incoming SCR is the pulse width is over before forward biasing the SCR.