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If a 400 V, 50 hz star connected, 3-phase squirrel cage induction motor is operated from 400V and 75 Hz supply. The torque that the motor can now provide while drawing rated current from the supply will _________

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If a 400 V, 50 hz star connected, 3-phase squirrel cage induction motor is operated from 400V and 75 Hz supply. The torque that the motor can now provide while drawing rated current from the supply will _________

(a) reduce

(b) increase

(c) remains same

(d) increases or reduces based on the rotor resistance.

This question was posed to me by my college director while I was bunking the class.

Origin of the question is Rotor EMF, Current and Power topic in portion Induction Machines of Electrical Machines

1 Answer

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Best answer
Correct option is (a) reduce

Explanation: The reactance will increase and so the torque will decrease.

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