EBK ELECTRICAL TRANSFORMERS AND ROTATIN
4th Edition
ISBN: 9781337025867
Author: Herman
Publisher: VST
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Chapter 14, Problem 18RQ
To what is the voltage regulation of a DC generator proportional?
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using the theorem of three moments, find all the reactions and supports
(An ellipsoidal trapping region for the Lorenz equations) Show that there is a certain ellipsoidal region E of the form rx2 + σy2 + σ(z − 2r)2 ≤ C such that all trajectories of the Lorenz equations eventually enter E and stay in there forever. For a much stiffer challenge, try to obtain the smallest possible value of C with this property.
A) In a factory, an s-type pitot tube was used to calculate the velocity of dry air for a point
inside a stack.
Calculate the velocity at that point (ft/sec) using following conditions:
●
•
•
Pressure = 30.23 ± 0.01 in Hg (ambient)
Pitot tube coefficient = 0.847 ± 0.03
Temperature = 122 ± 0.1 F (stack)
Temperature = 71.2 ± 0.1 F (ambient)
AP = 0.324 ± 0.008 in H2O (pitot tube)
•
AP = 0.891 ± 0.002 in H2O (stack)
B) Find the dominant error(s) when determining precision for the problem.
C) For part A, what is the precision in ft/sec for the velocity?
Chapter 14 Solutions
EBK ELECTRICAL TRANSFORMERS AND ROTATIN
Ch. 14 - Prob. 1RQCh. 14 - What type of voltage is produced in all rotating...Ch. 14 - What are the three types of armature windings?Ch. 14 - What type of armature winding would be used for a...Ch. 14 - What are interpoles, and what is their purpose?Ch. 14 - How are interpoles connected in relation to the...Ch. 14 - What type of field winding is made with many turns...Ch. 14 - How is the series field connected in relation to...Ch. 14 - How is the shunt field connected in relation to...Ch. 14 - What is armature reaction?
Ch. 14 - To what is armature reaction proportional?Ch. 14 - What are eddy currents?Ch. 14 - What condition characterizes overcompounding?Ch. 14 - Prob. 14RQCh. 14 - Prob. 15RQCh. 14 - Explain the difference between cumulative- and...Ch. 14 - What three factors determine the amount of output...Ch. 14 - To what is the voltage regulation of a DC...Ch. 14 - To what is countertorque proportional?Ch. 14 - Of what is countertorque a measure?
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