engineering recuitment GATE EE 2023-24 Test Series Electrical Machines DC Motor DC Motor Speed Regulation
A 4 pole 220 V, 24 hp shunt motor has the following data:
Field current = 5 A; armature resistance = 0.04 Ω; Flux per pole = 40 mWb; 160 armature conductors; 2 parallel paths (wave winding) ; full load current = 95 A ; no-load current = 9 A ; armature reaction negligible.
Which of the following statements is/are true?1
The no-load speed is 1030.5 rpm
2
The full load speed is 1004.375 rpm
3
The speed regulation expressed as a percentage of no-load speed is 2.53%
4
The speed regulation expressed as a percentage of no-load speed is 1.56%