Question

Calculate the r.m.s value of thyristor current in 1-Φ Full wave semi-converter for the load (Highly inductive) current=2.2 A and α=155°. (Asymmetrical configuration)

(a) .58 A

(b) .57 A

(c) .51 A

(d) .52 A

The question was asked in quiz.

This interesting question is from Solid-State Switching Circuits topic in division Introduction to Solid-State Switching Circuits of Electric Drives

Answer 1

Correct choice is (b) .57 A

Best explanation: The r.m.s value of source current in 1-Φ Full wave semi-converter is Io√π-α÷2π. It is the r.m.s value of the thyristor current. I(r.m.s) = Io√π-α÷2π=2.2(√.069)=.57 A.