Electric Motors and Control Systems
2nd Edition
ISBN: 9780073373812
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Question
Chapter 3.1, Problem 1RQ
To determine
(a)
The reason for using high voltages for transmitting electric power over long distances.
To determine
(b)
The limitation of high-voltage transmission systems.
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Topic: Kinetics of Particles: - Forces in dynamic system, Free body diagram, newton's laws of motion,
and equations of motion.
TQ1. The 10-kg block is subjected to the forces shown. In each case, determine its velocity
when t=2s if v 0 when t=0
500 N
F = (201) N
300 N
(b)
TQ2. The 10-kg block is subjected to the forces shown. In each case, determine its velocity at
s-8 m if v = 3 m/s at s=0. Motion occurs to the right.
40 N
F = (2.5 s) N
200 N
30 N
(b)
TQ3. Determine the initial acceleration of the 10-kg smooth collar. The spring has an
unstretched length of 1 m.
1
σ
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TQ9. If motor M exerts a force of F (10t 2 + 100) N
determine the velocity of the 25-kg crate when t
kinetic friction between the crate and the plane are μs
The crate is initially at rest.
on the cable, where t is in seconds,
4s. The coefficients of static and
0.3 and μk = 0.25, respectively.
M
3
TQ10. The spring has a stiffness k = 200 N/m and is unstretched when the 25-kg block is at A.
Determine the acceleration of the block when s = 0.4 m. The contact surface between the
block and the plane is smooth.
0.3 m
F= 100 N
F= 100 N
k = 200 N/m
σ
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Q
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my ID# is 016948724 please solve this problem step by step
Chapter 3 Solutions
Electric Motors and Control Systems
Ch. 3.1 - Prob. 1RQCh. 3.1 - a. If 1 MW of electric power is to be transmitted...Ch. 3.1 - Compare the type of AC power normally supplied to...Ch. 3.1 - a. Outline the basic function of a unit...Ch. 3.1 - list three factors taken into account in selecting...Ch. 3.1 - When motors and motor controllers are installed,...Ch. 3.1 - a. What types of conduit raceways are commonly...Ch. 3.1 - Compare the function of a switchboard, panelboard,...Ch. 3.2 - Define the terms primary and secondary as they...Ch. 3.2 - On what basis is a transformer classified as being...
Ch. 3.2 - Explain how the transfer of energy takes place in...Ch. 3.2 - In an ideal transformer, what is the relationship...Ch. 3.2 - A step-down transformer with a Wins ratio of 10:1...Ch. 3.2 - A step-up transformer has a primary current of 32...Ch. 3.2 - What is meant by the term transformer magnetizing,...Ch. 3.2 - Prob. 8RQCh. 3.2 - Prob. 9RQCh. 3.2 - Prob. 10RQCh. 3.2 - The primary of a transformer is rated for 480 V...Ch. 3.2 - A single-phase transformer is rated for 0.5 kVA, a...Ch. 3.3 - Explain the way in which the high-voltage and...Ch. 3.3 - Prob. 2RQCh. 3.3 - Prob. 3RQCh. 3.3 - Prob. 4RQCh. 3.3 - Prob. 5RQCh. 3.3 - Prob. 6RQCh. 3.3 - Prob. 7RQCh. 3.3 - Prob. 8RQCh. 3.3 - Explain the basic difference between the primary...Ch. 3.3 - Prob. 10RQCh. 3.3 - Prob. 11RQCh. 3.3 - Prob. 12RQCh. 3.3 - What important safety precaution should be...Ch. 3.3 - Prob. 14RQCh. 3.3 - The control transformer for an across-the-line...Ch. 3.3 - The two primary windings of a dual-primary control...Ch. 3.3 - Prob. 3TCh. 3.3 - A dry-type general-purpose power transformer is...Ch. 3.3 - A current transformer is to be tested in circuit...Ch. 3.3 - Discuss how electric power might be distributed...Ch. 3.3 - A block of several transformers arc fed from...Ch. 3.3 - How would you proceed with a DC resistance check...Ch. 3.3 - Prob. 5DT
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