Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781337264419
Author: Stephen L. Herman
Publisher: Cengage Learning US
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Chapter 3, Problem 9RQ
To determine
The current in the circuit.
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28. The shaft shown in Figure P5-28 is supported by bear-
ings at each end, which have bores of 20.0 mm. Design
the shaft to carry the given load if it is steady and the
shaft is stationary. Make the dimension a as large as pos-
sible while keeping the stress safe. Determine the required
d = 20mm
D = ?
R = ?|
5.4 kN d=20mm
Length not
to scale
-a = ?-
+а=
a = ? +
-125 mm-
-250 mm-
FIGURE P5-28 (Problems 28, 29, and 30)
12. Compute the estimated actual endurance limit for SAE
4130 WQT 1300 steel bar with a rectangular cross sec-
tion of 20.0 mm by 60 mm. It is to be machined and
subjected to repeated and reversed bending stress. A reli-
ability of 99% is desired.
28. The shaft shown in Figure P5-28 is supported by bear-
ings at each end, which have bores of 20.0 mm. Design
the shaft to carry the given load if it is steady and the
shaft is stationary. Make the dimension a as large as pos-
sible while keeping the stress safe. Determine the required
d = 20mm
D = ?
R = ?|
5.4 kN d=20mm
Length not
to scale
-a = ?-
+а=
a = ? +
-125 mm-
-250 mm-
FIGURE P5-28 (Problems 28, 29, and 30)
Chapter 3 Solutions
Electrical Transformers and Rotating Machines
Ch. 3 - How many degrees are the current and voltage out...Ch. 3 - How many degrees are the current and voltage out...Ch. 3 - To what is inductive reactance proportional?Ch. 3 - Four inductors, each having an inductance of 0.6...Ch. 3 - Three inductors are connected in parallel....Ch. 3 - Prob. 6RQCh. 3 - An inductor is connected to a 240-V, 1000-Hz line....Ch. 3 - Prob. 8RQCh. 3 - Prob. 9RQCh. 3 - An inductor has an inductive reactance of 250 Ω...
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- 2. A strut in a space frame has a rectangular cross section of 10.0 mm by 30.0 mm. It sees a load that varies from a tensile force of 20.0 kN to a compressive force of 8.0 kN.arrow_forwardfind stress at Qarrow_forwardI had a theoretical question about attitude determination. In the attached images, I gave two axis and angles. The coefficient of the axes are the same and the angles are the same. The only difference is the vector basis. Lets say there is a rotation going from n hat to b hat. Then, you introduce a intermediate rotation s hat. So, I want to know if the DCM produced from both axis and angles will be the same or not. Does the vector basis affect the numerical value of the DCM? The DCM formula only cares about the coefficient of the axis and the angle. So, they should be the same right?arrow_forward
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- 2.4 (A). A 75 mm diameter compound bar is constructed by shrinking a circular brass bush onto the outside of a 50 mm diameter solid steel rod. If the compound bar is then subjected to an axial compressive load of 160 kN determine the load carried by the steel rod and the brass bush and the compressive stress set up in each material. For steel, E 210 GN/m²; for brass, E = 100 GN/m². [I. Struct. E.] [100.3, 59.7 kN; 51.1, 24.3 MN/m².]arrow_forward1.7 (A). A bar ABCD consists of three sections: AB is 25 mm square and 50 mm long, BC is of 20 mm diameter and 40 mm long and CD is of 12 mm diameter and 50 mm long. Determine the stress set up in each section of the bar when it is subjected to an axial tensile load of 20 kN. What will be the total extension of the bar under this load? For the bar material, E = 210GN/m2. [32,63.7, 176.8 MN/mZ, 0.062mrn.l 10:41 مarrow_forward2.2 (A). If the maximum stress allowed in the copper of the cable of problem 2.1 is 60 MN/m2, determine the maximum tension which C3.75 kN.1 10:41 مarrow_forward
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