INDUSTRIAL MOTOR CONTROL
7th Edition
ISBN: 9780357670590
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 34, Problem 3RQ
What is a freewheeling or kickback diode?
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A single degree damped vibrating system is formed of a block of mass m = 7 kg, a spring of K = 100 N/m and a damper of damping constant C.
The initial position of the block is at x0 = 100 mm. The system was initially at rest. The figure below represents the variation of the displacement of the block with respect to time.
Determine the response of at t = 1s for x1 = 10 mm.
Select one:
x(t) = 13.227 mm
x(t) =-28.9637 mm
x(t) = 21.002 mm
x(t) = 45.4319 mm
Need help with x coordinate. Round to 3 sig figs
A sign ABCD is constructed from 5 mm thick plate steel
(density p=8000 kg/m³) with the geometry shown in the
figure. The sign is connected to the wall by a pin at A and
also supported by member BE. Support member BE is also
constructed from 5 mm thick plate steel and is connected by
pins at B and E respectively. Determine the reaction forces
at A and E. Enter your answers in Cartesian components.
The weights of both the sign ABCD and member BE
should be accounted for in the calculation. Assume the pins
cm away from the ends at each
are located a distance
พ
connection.
W
E
CC +
BY NC SA
2016 Eric Davishahl
-ད་
2
B
C
D
-b-
h
Values for dimensions on the figure are given in the following
table. Note the figure may not be to scale.
Variable Value
a
2.4 m
b
2.88 m
с
1.2 m
h
1.152 m
ω
7 cm
The reaction at A is A
-1265
The reaction at E is E
3291
0
× i-
✓
× ĴN.
=
0
* i+
× ĴN.
Chapter 34 Solutions
INDUSTRIAL MOTOR CONTROL
Ch. 34 - Prob. 1RQCh. 34 - Why is this component used instead of a diode?Ch. 34 - What is a freewheeling or kickback diode?Ch. 34 - Name two methods of sensing the current flow...Ch. 34 - Prob. 5RQCh. 34 - What unit controls the voltage applied to the...Ch. 34 - What device is often used to sense motor speed?
Ch. 34 - Prob. 8RQ
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- A sign ABCD is constructed from 5 mm thick plate steel (density p =8000 kg/m³) with the geometry shown in the figure. The sign is connected to the wall by a pin at A and also supported by member DE. Support member DE is also constructed from 5 mm thick plate steel and is connected by pins at B and E respectively. Determine the reaction forces at A and E. Enter your answers in Cartesian components. The weights of both the sign D and member DE should be accounted for in the calculation. Assume the pins cm away from the ends at each are located a distance ข ADV connection. W W E cc 10 BY NC SA 2016 Eric Davishahl 2 B C D W -b- h Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 2.4 m b 2.88 m с 1.2 m h 1.152 m พ 7 cm The reaction at A is A The reaction at E is E = ît Ĵ N. i+ ĴN.arrow_forwardс Compute the coordinates of the centroid (x, y) of the area shown. Also compute the area moment of intertia about the x' and y' axes with origin at the centroid. ул 2013 Michael Swanbom cc 10 BY NC SA + a * ьжа त्र x Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 44 cm b 18 cm 75 cm C The coordinate of the centroid is = cm. The У coordinate of the centroid is y = cm.arrow_forwardFind the tension in each segment. 7 ft B 4 ft 50lb 4 ft 5 ft 3 ft 100 lb D Fbc = 47 #, Fba = 83 #, Fcd = 88 # Fbc = 40 #, Fba = 50 #, Fcd = 33 # Fbc = 27 #, Fba = 68 #, Fcd = 18 # ☐ none of the abovearrow_forward
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