Answered: The maximum speed of an alternator…

The maximum speed of an alternator working at 60 Hz is possible when the number of poles of the machine is a. 2 b. 4 c C. 5 d. 3 The correct answer is. 2

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter31: Three-phase Alternators

Section: Chapter Questions

Problem 1RQ: What conditions must be met before two alternators can be paralleled together?

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Concept explainers

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.

Question

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The maximum speed of an alternator working at 60 Hz is possible
when the number of poles of the machine is
**.***LEE
a. 2
b.4
C. 5
d. 3
The cerrecttanswer is 2

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