A 400 V, 50 Hz, 4-pole, 3-phase, star-connected induction motor has the followingdata: stator impedance per phase is (0.7+ j 0.4), rotor impedance per phasereferred to stator side is (0.3 + j 0.2) §, magnetizing reactance per phase is 30 N.The machine is operating at a slip of 4%. Draw the exact equivalent circuit anddetermine: stator current, motor power factor, input power, and rotor current?

Answered: A 400 V, 50 Hz, 4-pole, 3-phase,…

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter35: Harmonics 916

Section: Chapter Questions

Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...

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Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction motor? Explain your answer.
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Q3 A 50 Hz split-phase induction motor has a resistance of 50 and an inductive reactance of 200 in the main winding as well as starting winding. Determine the value of resistance and capacitance to be added in series with the starting winding to send the same current in each winding with a phase difference of 90°. Ans[ 14.99 Ω, 127.5μF]
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