engineering recuitment GATE EE 2023-24 Test Series Power Electronics and Drives Phase Controlled Rectifiers Single Phase Full Wave Converters
A single-phase semi converter shown below figure, is used to control the speed of the small separately excited dc motor at 4.5 kW, 220 V, 1500 rpm. The converter is connected to a single-phase 230 V, 50 Hz supply. The armature resistance is Ra = 0.50 Ω and the armature circuit inductance is La = 10 mH. The motor voltage constant is Kb = 0.1 V/rpm
With the converter operates as a rectifier, the dc motor runs at 1200 rpm and carries an armature current of 16 A. Assume that the motor current is continuous and ripple-free. The firing angle is _______ (in degrees)Enter numerical value using the virtual keypad. Round off where necessary.