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In the below given circuit, at the instant T1 the main SCR is triggered, the voltage across the load terminal is

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in Power Electronics by (27.1k points)
In the below given circuit, at the instant T1 the main SCR is triggered, the voltage across the load terminal is

(a) Vs

(b) 0

(c) 2Vs

(d) Vs + Ldi/dt

The question was posed to me in an interview for job.

My question comes from Thyristor Chopper Circuits-2 topic in section Choppers of Power Electronics

1 Answer

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by (45.1k points)
Correct choice is (a) Vs

To explain I would say: When the main SCR is gated, the commutating circuit remains inactive. Hence the load is directly connected to Vs through the SCR. Considering SCR as an ideal switch Vo = Vs.

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