Calculate the external resistance to be added

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Reference no: EM131267276

1. A 400 V, 5 kW, 50 Hz induction motor runs at 1445 rpm at full-load. The rotational losses are 285 Ω. If the maximum torque occurs at 900 rpm. calculate its value.

2. The rotor of a 6-pole, 50 Hz slip ring induction motor has a resistance of 0.25 Ω/ phase and runs at 960 rpm. Calculate the external resistance/phase to be added to lower the speed to 800 rpm with load torque redcing to 3/4th of the previous value.

Reference no: EM131267276

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