Question

For the following circuit, the SCR (thy2) is

(a) forced commutated at ωt = π

(b) forced commutated at ωt = 2π

(c) naturally commutated at ωt = π

(d) naturally commutated at ωt = 2π

This question was posed to me in examination.

I need to ask this question from Firing Circuits-3 topic in portion Other Circuits of Power Electronics

Answer 1

Correct option is (c) naturally commutated at ωt = π

To explain I would say: Circuit is that of a half-wave RC firing circuit where natural commutation takes place at π due to the sinusoidal voltage source.