EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
7th Edition
ISBN: 9780176919962
Author: Herman
Publisher: VST
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Chapter 42, Problem 1RQ
To determine
Whether the synchronous speed changes on changing the voltage of AC induction motor.
Expert Solution & Answer
Explanation of Solution
The speed of the motor is controlled by changing the applied voltage instead of changing the voltage of AC induction motor.
For an AC induction motor, the stator of the motor or magnetic field rotates at the synchronous speed. So, on varying the voltage of the motor, only the rotor speed changes and stator is continuously running with synchronous speed.
Thus, the synchronous speed does not change on changing the voltage of AC induction motor.
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what is shear stress and normal? how to tell them while calculating?
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PROBLEM 1.61
For the assembly and loading of Problem 1.60, determine (a) the
average shearing stress in the pin at C, (b) the average bearing stress at
C in member BC, (c) the average bearing stress at B in member BC.
PROBLEM 1.60 Two horizontal 20-kN forces are applied to pin B of
the assembly shown. Knowing that a pin of 20-mm diameter is used at
each connection, determine the maximum value of the average normal
stress (a) in link AB, (b) in link BC.
How do you find these answers?
Chapter 42 Solutions
EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
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