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A three phase, 50 Hz induction motor has a full load speed of 1440 rpm. Rotor frequency is?

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+1 vote
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A three phase, 50 Hz induction motor has a full load speed of 1440 rpm. Rotor frequency is?

(a) 2 Hz

(b) 50 Hz

(c) 52 Hz

(d) 58 Hz

I have been asked this question in homework.

My question comes from Rotor Frequency topic in division Induction Machines of Electrical Machines

1 Answer

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Best answer
Right choice is (a) 2 Hz

For explanation I would say: s = 0.04, rotor frequency = s*f = 0.04*50 = 2 Hz.

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