Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Question
Chapter 54, Problem 1SQ
To determine
Write the formula for finding the speed of an AC squirrel cage induction motor.
Expert Solution & Answer
Answer to Problem 1SQ
The formula to find the speed of an AC squirrel cage induction motor is
Explanation of Solution
Discussion:
The squirrel cage induction motor’s speed depends on the frequency of the supply current and number of motor’s poles.
Write the expression to find the speed of an AC squirrel cage induction motor as follows:
Here
Hertz is the unit of frequency of supply current.
Rewrite the expression in Equation (1) in terms of number of poles of the motor as follows:
Conclusion:
Thus, the formula for finding the speed of an AC squirrel cage induction motor is
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Chapter 54 Solutions
Electric Motor Control
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