Question

In a 3-phase semi-converter, firing angle is less than 60°, as such each SCR and diode conduct respectively for __________ (in degrees)

(a) 60, 60

(b) 90, 30

(c) 120, 120

(d) 180, 180

This question was posed to me by my college professor while I was bunking the class.

I need to ask this question from Three Phase Converters-4 topic in section Converters of Power Electronics

Answer 1

Correct option is (c) 120, 120

The explanation is: Each will conduct for 120° per cycle whatever the firing angle is.