Answered: A 3-phase synchronous machine with 6…

A 3-phase synchronous machine with 6 pole pairs per phase is driven from a 120 V, 69 Hz AC supply. What is its synchronous speed? Give your answer in rpm to the nearest whole number.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter39: Synchronous Motor Operation

Section: Chapter Questions

Problem 12SQ

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Concept explainers

Single Phase Induction Motor

The single-phase induction motor or engine consists of a single rotating phase in the stator and a rotating cage in the rotor. When phase one supply is connected to the stator winding, a magnetic field is generated. In the pulsating field, the rotor does not rotate due to inertia. So, a single-phase import motor does not start and requires some initial methods.

Question

A 3-phase synchronous machine with 6 pole pairs per phase is driven from a 120 V, 69 Hz AC supply.
What is its synchronous speed? Give your answer in rpm to the nearest whole number.

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