engineering recuitment GATE EE 2023-24 Test Series Electrical Machines Three Phase Induction Motor Induction Motor Speed Control
The rotor of three phase 6 pole 50 Hz slip ring induction motor has resistance of 0.2 Ω per phase and runs at 960 rpm on full load. The resistance to be inserted in the rotor circuit so that speed reduces to 800 rpm. With torque remain constant is ________
1
0.2 Ω/ph
2
0.6 Ω/ph
3
0.8 Ω/ph
4
0.4 Ω/ph