Q1// A double-cage of a 3-phase, 50-Hz, 4-pole induction motor, have the followingequivalent circuit parameters, all of which are phase values referred to the stator and thestator impedance is negligible:Outer cage Ro' = 99Xo' = 252Inner cage R' = 25X₁' = 851- Calculate the ratio of torques produced by outer cage and inner cage at starting.2- If the motor runs at 1425 rpm and the rotor input phase voltage is 230 V, calculate thetoque in synchronous watt per phaseTo3- What slip will the torque contributed by the two cages be equal?

It is given that: f=50HzP=4V=230 VNr=1425 rpmOuter cage:Ro'=9Ω Xo'=2ΩInner cage:Ri'=2Ω Xi'=8Ω

Q1// A double-cage of a 3-phase, 50-Hz, 4-pole induction motor, have the following equivalent circuit parameters, all of which are phase values referred to the stator and the stator impedance is negligible: Outer cage Ro'=9 Xo' = 252 Inner cage R' = 25 X₁' = 82 1- Calculate the ratio of torques produced by outer cage and inner cage at starting. 2- If the motor runs at 1425 rpm and the rotor input phase voltage is 230 V, calculate the toque in synchronous watt per phase To = Ti 3- What slip will the torque contributed by the two cages be equal?

Q1// A double-cage of a 3-phase, 50-Hz, 4-pole induction motor, have the following equivalent circuit parameters, all of which are phase values referred to the stator and the stator impedance is negligible: Outer cage Ro'=9 Xo' = 252 Inner cage R' = 25 X₁' = 82 1- Calculate the ratio of torques produced by outer cage and inner cage at starting. 2- If the motor runs at 1425 rpm and the rotor input phase voltage is 230 V, calculate the toque in synchronous watt per phase To = Ti 3- What slip will the torque contributed by the two cages be equal?

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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