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If the frequency is reduced by 50% for a 3-phase, 50 Hz induction motor having 4 poles. The slip at which the maximum torque occurs becomes _________(a) 2*s(b) s(c) 1/2s(d) 1/sI got this question in homework.Origin of the question is Induction Motor Phasor Diagram topic in division Induction Machines of Electrical Machines |
Answer» CORRECT option is (a) 2*s The best explanation: s = r/x s α 1/f. If the FREQUENCY is reduced to half, SLIP INCREASES to TWICE. |
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