In a spinning industry, a 215 V, 4 pole shunt motor runs at a speed of 1300 rpm gives an output of 8 HP with an armature current of 38 A. The armature winding is wave-connected and it has 670...

Extracted text: In a spinning industry, a 215 V, 4 pole shunt motor runs at a speed of 1300 rpm gives an output of 8 HP with an armature current of 38 A. The armature winding is wave-connected and it has 670 conductors. Its armature resistance is 0.5 N and drop at each brush is 1 V. Find (i) Useful torque, (ii) Total torque, (iii) Useful flux per pole and (iv) Rotational losses occurring in the motor. [ 1HP= 746 W ] Useful Torque Total Torque Flux per pole Rotational Loss in the Motor