ELECTRIC MOTORS+CONTROLS ACTIVITIES MAN.
3rd Edition
ISBN: 9781260439380
Author: Petruzella
Publisher: MCG
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Textbook Question
Chapter 1.1, Problem 17RQ
List four hazardous properties or characteristics.
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Exercise 3-12: Find the Thévenin equivalent of the circuit
to the left of terminals (a, b) in Fig. E3.12, and then
determine the current I.
502
502
0.6 Ω
20 V
| +
<302
Ω
ΣΙΩ
b
2025
Ω
15A
Figure E3.12
2. Consider following feedback system.
r(t)
e(t)
y(t)
K
G(s)
1
where G(S)
=
s²+as+b
In above, K, a and b are constants. Select the values of K, a and b in a way so that
(i)
(ii)
(iii)
the closed loop system is stable,
steady-state error of the closed-loop system for step input is 0.2,
the closed-loop response has 20% overshoot and 2 seconds as settling time.
Chapter 1 Solutions
ELECTRIC MOTORS+CONTROLS ACTIVITIES MAN.
Ch. 1.1 - Does the severity of an electric shock increase or...Ch. 1.1 - In general, voltage levels above what value are...Ch. 1.1 - In general, current levels above what value are...Ch. 1.1 - What circuit fault can result in an arc flash?Ch. 1.1 - Define each of the following terms associated with...Ch. 1.1 - Explain why an arc flash is so potentially...Ch. 1.1 - What is a permit-required confined space?Ch. 1.1 - What does the term personal protective equipment...Ch. 1.1 - What personal protective attire is required when...Ch. 1.1 - When should face shields be worn?
Ch. 1.1 - A fall arrest system must be rigged so that...Ch. 1.1 - A ladder is used to reach the top of a building 16...Ch. 1.1 - What are the deck requirements for a scaffold work...Ch. 1.1 - Prob. 14RQCh. 1.1 - List the three ingredients required to sustain a...Ch. 1.1 - Which classes of fire are multipurpose...Ch. 1.1 - List four hazardous properties or characteristics.Ch. 1.2 - Prob. 1RQCh. 1.2 - Compare the terms grounding and bonding.Ch. 1.2 - Why is the earth not considered to be an effective...Ch. 1.2 - Explain what is meant by a ground fault.Ch. 1.2 - How does a ground-fault circuit interrupter (GFCI)...Ch. 1.2 - How does a ground-fault circuit interrupter (GFCI)...Ch. 1.2 - Explain what is meant by an arcing fault.Ch. 1.2 - Compare the amount of current that results from...Ch. 1.2 - Compare what GFCIs and AFCIs protect against.Ch. 1.2 - What does a lockout-tagout procedure refer to?Ch. 1.2 - Prob. 11RQCh. 1.2 - A voltmeter is used to verify that no voltage is...Ch. 1.2 - What is the main goal of OSHA?Ch. 1.2 - What is the primary purpose of the rules set forth...Ch. 1.2 - Assume a piece of electrical equipment has been...Ch. 1.2 - How often is the National Electrical Code updated...
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