Question

In the thyristor gating circuit, the ZCD is used to

(a) amplify the voltage

(b) produce a train of pulses

(c) convert AC input the ramp voltage

(d) used to step-down the voltage

The question was posed to me in an international level competition.

I'd like to ask this question from Gating Circuits topic in division Other Circuits of Power Electronics

Answer 1

Correct answer is (c) convert AC input the ramp voltage

For explanation I would say: It is used to convert the AC synchronizing input voltage into ramp voltage & synchronizes it with the zero crossing of the AC supply.