Calculate the following:
A 500 hp, three-phase, 2200 V, 60 Hz, 12-pole, Y-connected wound-rotor
induction motor has the following parameters:
a. Slip at maximum torque
b. Input current and power factor at maximum torque
c. Maximum torque
d. Resistance that must be added to the rotor windings (per phase) to achieve
maximum torque at starting
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