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A wound rotor, induction motor has a rotor resistance of 0.6 ohms per phase and a...

A wound rotor, induction motor has a rotor resistance of 0.6 ohms per phase and a rotor leakage reactance of 8 ohms

. a) What is the operating speed (rpm) of this 2-pole induction motor fed from a 50 Hz supply if the slip is 5%?

b) If maximum torque occurs when R2 = sX2, what is the slip at maximum torque?

c) What resistance must be added to the rotor circuit to give maximum starting torque?

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