QUESTION 6A 90KW, 6 pole synchronous motor is designed to operate from a 400 volt 60 hertz supply underrated conditions. At what speed would the motor have to be operated to ensure approximate ratedflux conditions when 180 volts line was applied to its terminals.

This is synchronous motor so it will run at synchronous speed which can be calculated as per below…

Answered: QUESTION 6 A 90KW, 6 pole synchronous…

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter33: Single-phase Motors

Section: Chapter Questions

Problem 29RQ: What is the synchronous speed of an eight-pole stepping motor when connected to a twophase, 60-Hz AC...

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QUESTION 6 A 90KW, 6 pole synchronous motor is designed to operate from a 400 volt,60 hertz supply under rated conditions. At what speed would the motor have to be operated to ensure approximate rated flux conditions when 180 volts line was applied to its terminals.