/www.thestudentsurvey.com/ The number of poles and the frequency of the applied voltage determine the synchronous speed of rotation in the motor's stator. Motors are commonly configured to have 2, 4, 6 or 8 poles. The synchronous speed, a term given to the speed at which the field produced by primary currents will rotate, is determined by the following expression: Synchronous speed of rotation = (120 x supply frequency)/Number of poles on the stator. In our case, a 3-phase, 20-pole induction motor is connected to a 600 V, 60 Hz source. a. What is the motor's synchronous speed? b. If the voltage is reduced to 300 V, will the synchronous speed change?

/www.thestudentsurvey.com/ The number of poles and the frequency of the applied voltage determine the synchronous speed of rotation in the motor's stator. Motors are commonly configured to have 2, 4, 6 or 8 poles. The synchronous speed, a term given to the speed at which the field produced by primary currents will rotate, is determined by the following expression: Synchronous speed of rotation = (120 x supply frequency)/Number of poles on the stator. In our case, a 3-phase, 20-pole induction motor is connected to a 600 V, 60 Hz source. a. What is the motor's synchronous speed? b. If the voltage is reduced to 300 V, will the synchronous speed change?

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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