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For a 4 pole three phase induction motor having synchronous speed of 1500 rpm is operating at 1450rpm. The frequency of the induced emf in rotor is?(a) 100 Hz(b) 50 Hz(c) 150 Hz(d) 0 HzThe question was posed to me in class test.The origin of the question is Rotor Frequency topic in section Induction Machines of Electrical Machines |
Answer» CORRECT option is (a) 100 HZ The explanation is: The INDUCED frequency will be f = P(Ns-Nr)/2. f = 4(1500-1450)/2 = 100 Hz. |
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