Find the additional rotor resistance

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Reference no: EM131359269

The rotor resistance and reactance of a wound-rotor induction motor at standstill are 0.14 ohm per phase and 0.8 ohm per phase, respectively. Assuming a transformer ratio of unity, from the eight-pole stator having a phase voltage of 254 V at 60 Hz to the rotor secondary, find the additional rotor resistance required to produce maximum torque at:

A. starting s = 1.

B. a speed of 450 r/min.

Reference no: EM131359269

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