Question

Calculate the r.m.s value of source current in 1-Φ Full wave semi-converter for the load (Highly inductive) current=51.2 A and α=15°.

(a) 10.53 A

(b) 14.52 A

(c) 44.92 A

(d) 49.02 A

This question was addressed to me in examination.

My enquiry is from Solid-State Switching Circuits in section Introduction to Solid-State Switching Circuits of Electric Drives

Answer 1

Correct choice is (d) 49.02 A

Explanation: The r.m.s value of source current in 1-Φ Full wave semi-converter is Io√π-α÷π. It is the r.m.s value of the source current. I(r.m.s) = Io√π-α÷π = 51.2(√.916) = 49.02 A.