Fill in the answers to questions 1 through 9. A three-phase...

Name: Problem 4, Chapter 17: Electricity 4: AC/DC Motors, Controls, and Maintenance
Uploaded: 2021-11-20T03:16:23-08:00
Duration: 3 min 35 s
Channel: Narayan Hari
Description: Fill in the answers to questions 1 through 9. A three-phase synchronous motor with six stator poles and six rotor poles is operated from a three-phase, 60 Hz line of the correct voltage rating. Determine the speed of the motor.

Fill in the answers to questions 1 through 9. A three-phase synchronous motor with six stator poles and six rotor poles is operated from a three-phase, 60 Hz line of the correct voltage rating. Determine the speed of the motor._______________________________________________________ ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Fill in the answers to questions 1 through 9.
A three-phase synchronous motor with six stator poles and six rotor poles is operated
from a three-phase, 60 Hz line of the correct voltage rating. Determine the speed of the
motor._______________________________________________________
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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Key Concepts

Synchronous Speed

This concept pertains to the speed at which the rotating magnetic field in a synchronous motor turns. It is determined by the supply frequency and the number of poles in the stator. The motor rotor, when synchronized with this field, runs at the same speed, making the synchronous speed a key parameter in designing and analyzing synchronous machines.

Calculation Formula (ns = 120f/P)

This formula relates the synchronous speed (ns) of an AC motor to the supply frequency (f) and the number of poles (P). Here, '120' is a constant used when the supply frequency is in Hertz (cycles per second) and the speed is expressed in revolutions per minute (rpm). Understanding and applying this formula is essential for calculating the operating speed of the motor based on its electrical frequency and pole count.

Three-Phase AC Supply

Three-phase AC supply is a common power system configuration that provides a constant and balanced power flow to electric motors and other equipment. In the context of synchronous motors, the three-phase system is used to produce a uniformly rotating magnetic field, which is critical for the motor to achieve and maintain synchronous speed.

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