A 400 V, 4-pole, 7.5 kW, 50 Hz, 3-phase induction motor develops its full-load torque at a slip of 4%. The per phase circuit parameters of the machine are
Mechanical, core and stray losses may be neglected.
(a) Find the rotor resistance (as referred to stator)
(b) Find the maximum torque, slip at maximum torque and the corresponding rotor speed