engineering recuitment UPCL AE (E&M) 2021 Mock Test Electrical Machines Three Phase Induction Motor Induction Motor Torque
A 3 phase, 50 Hz, six pole induction motor has a rotor resistance of 0.1 Ω and reactance of 0.5 Ω. Neglect the voltage drop in stator and assume that the rotor resistance is constant. Given that the full load slip is 5%, the ratio of maximum torque to full load torque is approximately equal to
1
2.5
2
1.125
3
2.125
4
2.34