Question

In case of three-phase dual converter, one of the converter circuits is fired at an angle of 60°. For both the converter circuits to have equal average output voltage, what is the value of the firing angle for the other converter circuit?

(a) 60°

(b) 120°

(c) 100°

(d) Insufficient data

I had been asked this question by my college professor while I was bunking the class.

I'm obligated to ask this question of Dual  Converters-2 in section Converters of Power Electronics

Answer 1

Correct choice is (b) 120°

The explanation is: For equal average output voltage, α1 + α2 = 180°.