A three-phase induction motor, operating at rated voltage and frequency, has a starting torque of 1.35 times and a maximum torque of 2.2 times, both with respect to its rated-load torque. Ignoring the effects of the stator resistance and rotational losses and assuming constant rotor resistance, determine the slip rated load, and the rotor current at starting (as a percentage of the rotor current at rated load). The slip at maximum torque is 0.343 if that helps.

Delmar's Standard Textbook Of Electricity
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Chapter35: Harmonics 916
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Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...
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A three-phase induction motor, operating at rated voltage and frequency, has a starting
torque of 1.35 times and a maximum torque of 2.2 times, both with respect to its rated-load
torque. Ignoring the effects of the stator resistance and rotational losses and assuming
constant rotor resistance, determine the slip rated load, and the rotor current at starting (as a percentage of the rotor current at rated load).

The slip at maximum torque is 0.343 if that helps.

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