(Solved): a) The power flow diagram of shunt DC generator is shown in figure below. The rotational losses of ...

a) The power flow diagram of shunt DC generator is shown in figure below. The rotational losses of the generator ar 120W. Find the following: i. Total copper loss. ii. Mechanical developed power. iii. Overall efficiency, n of the generator Pin Pu The mechanical power developed. The output power. Pm 465 W 450 W 18 kW (4 marks) b) A compound DC motor draws a full load line current of 30 A from a terminal voltage of 240 V. The armature, series and shunt field resistance are 0.4 ?, 0.05 ? and 120 , respectively. The machine runs at a speed of 1200 rpm with friction and windage losses of 370 W. Compute the: i. The counter emf of the motor. ii. iii. (6 marks)