Industrial Motor Control
7th Edition
ISBN: 9781133691808
Author: Stephen Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 36, Problem 4RQ
What is the most common device used to disconnect the start winding of a resistance start single-phase motor that is intended to operate in the open air?
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PROBLEM 3.23
3.23 Under normal operating condi-
tions a motor exerts a torque of
magnitude TF at F. The shafts
are made of a steel for which
the allowable shearing stress is
82 MPa and have diameters of
dCDE=24 mm and dFGH = 20
mm. Knowing that rp = 165
mm and rg114 mm, deter-
mine the largest torque TF
which may be exerted at F.
TF
F
rG-
rp
B
CH
TE
E
1. (16%) (a) If a ductile material fails under pure torsion, please explain the failure
mode and describe the observed plane of failure.
(b) Suppose a prismatic beam is subjected to equal and opposite couples as shown
in Fig. 1. Please sketch the deformation and the stress distribution of the cross
section.
M
M
Fig. 1
(c) Describe the definition of the neutral axis.
(d) Describe the definition of the modular ratio.
using the theorem of three moments, find all the moments, I only need concise calculations with minimal explanations. The correct answers are provided at the bottom
Chapter 36 Solutions
Industrial Motor Control
Ch. 36 - List five common starting methods for three-phase...Ch. 36 - Prob. 2RQCh. 36 - A squirrel-cage motor produces 1100 pound-feet of...Ch. 36 - What is the most common device used to disconnect...Ch. 36 - Prob. 5RQCh. 36 - Prob. 6RQCh. 36 - Prob. 7RQCh. 36 - Prob. 8RQCh. 36 - Prob. 9RQCh. 36 - Prob. 10RQ
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