engineering recuitment GATE IN Test Series 2023-24 Mock Test Electrical Machines Three Phase Induction Motor Induction Motor Torque
A three-phase, 4 – pole, 600 V, 60 Hz induction motor is modeled by Zth = 0.6933 + j1.933 Ω, \(R_2^1 = 4.5\;{\rm{\Omega }}\;\) and \(X_2^1 = 2{\rm{\Omega }}\). If the motor is absorbing power from the three-phase lines at rated frequency, which of the following is/are true?
1
The slip at maximum torque occurs is 2.25
2
The shaft speed at which maximum torque occurs is -2250 rpm
3
At maximum torque, the motor is operating in the braking mode
4
The slip at maximum torque occurs is 1.127