A small three-phase IG has the following nameplate data: 110 V, 1.140 rpm, 60 Hz, Y connection, and 1250 W. The blocked rotor test at 60 Hz yielded the following: I = 69.4 A, P = 4200 W.
The turn ratio between stator and rotor is 1.13, and the rotor resistance referred to the stator is 4.2 Ω. What are the full load torque and air-gap power?