Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Question
Chapter 37, Problem 8RQ
To determine
The size of the conductor, overload size, fuse size, NEMA and IEC starter sizes, the upper and lower range of the starting current for the motor.
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Students have asked these similar questions
Problem 1:
For each of the following images, draw a complete FBD and KD for the specified objects. Then
write the equations of motion using variables for all unknowns (e.g., mass, friction coefficient,
etc.), plugging in kinematic expressions and simplifying where appropriate. Assume motion in
all cases, so any friction would be kinetic.
M
(a) Blocks A & B (Be careful with
acceleration of B relative to accelerating
block A)
30°
(b) Block A being pulled up my motor M
(use rotated rectangular coordinate system)
20°
(c) Ball at C, top of swing (use path
coordinates)
(d) Parasailer/Person (use polar coordinates)
where M1=0.41m, M2=1.8m, M3=0.56m, please use bernoulis equation where necessary and The solutions should include, but not be limited to, the equations used tosolve the problems, the charts used to solve the problems, detailed working,choice of variables, the control volume considered, justification anddiscussion of results etc.If determining the friction factor, the use of both Moody chart and empiricalequations should be used to verify the validity of the value.
Q3. The attachment shown in Fig.2 is made of 1040 HR. Design the weldment
(give the pattern, electrode number, type of weld, length of weld, and leg size).
All dimensions in
mm
120
Fig.2
12
17
b =7.5
5 kN
60
60°
Chapter 37 Solutions
Understanding Motor Controls
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