Question

Calculate the r.m.s value of thyristor current in 3-Φ Full wave converter for the load current=4 A and α=12°.

(a) 2.3 A

(b) 2.5 A

(c) 2.7 A

(d) 2.9 A

I got this question in unit test.

I want to ask this question from Solid-State Switching Circuits topic in chapter Introduction to Solid-State Switching Circuits of Electric Drives

Answer 1

Correct option is (a) 2.3 A

Best explanation: The r.m.s value of thyristor current in 3-Φ Full wave converter is Io√1÷3. It is the r.m.s value of the thyristor current. I(r.m.s) = Io√1÷3 = 2.3 A.