Question

Calculate the average value of current for the 3-Φ phase Half-wave uncontrolled rectifier if the supply value is 400 V and resistive load value is 5 Ω.

(a) 54.04 A

(b) 57.26 A

(c) 51.64 A

(d) 58.15 A

I had been asked this question in an online interview.

Question is from Solid-State Switching Circuits in portion Introduction to Solid-State Switching Circuits of Electric Drives

Answer 1

The correct answer is (a) 54.04 A

For explanation I would say: The Io(avg) for the 3-Φ phase Half-wave uncontrolled rectifier is 3Vml÷2πR. The value of output voltage is 3Vml÷2πR=3×√2×440÷6.28×5=54.04 A.