Question

A motor load is connected to a single-phase full converter B-2 type controlled rectifier, the net energy is transferred from ac source to the motor (dc load) when

(a) π+α > 90

(b) π-α < α

(c) π+α < α

(d) π-α > α

The question was asked in an online interview.

My question comes from Single Phase FW AC-DC-3 topic in portion Converters of Power Electronics

Answer 1

The correct choice is (b) π-α < α

For explanation I would say: It works as a converter when π-α < α.