Question

Calculate the Vo(avg) for the 3-Φ phase Half-wave controlled rectifier if the supply value is 364 V and the value of firing angle is 2°.

(a) 247.62 V

(b) 245.76 V

(c) 214.26 V

(d) 233.26 V

I got this question in a national level competition.

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

Answer 1

The correct answer is (b) 245.76 V

The best I can explain: The Vo(avg) for the 3-Φ phase Half-wave controlled rectifier is 3Vmlcos(α)÷2π. The value of output voltage is 3Vmlcos(α)÷2π=3×√2×364×(.99)÷6.28=245.76 V.