Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 1, Problem 10RQ
What is the most important function of any control system?
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Determine the magnitude of the moment created by the force about the point A.
=
MMB 241- Tutorial 1.pdf
2/3
80%
+ +
10. Determine a ats = 1 m
v (m/s)
4
s (m)
2
11. Draw the v-t and s-t graphs if v = 0, s=0 when t=0.
a (m/s²)
2
t(s)
12. Draw the v-t graph if v = 0 when t=0. Find the equation v = f(t) for each
a (m/s²)
2
segment.
2
-2
13. Determine s and a when t = 3 s if s=0 when t = 0.
v (m/s)
2
t(s)
t(s)
2
Q.5) A cylinder is supported by spring AD and
cables AB and AC as shown. The spring has an at
rest length (unstretched length) of 4 meters. If the
maximum allowable tension in cables AB and AC
is 200 N, determine
(a) the largest mass (kg) of cylinder E the system
can support,
(b) the necessary spring constant (stiffness) to
maintain equilibrium, and
(b) the tension (magnitude) in each cable when
supporting the maximum load found in part (a).
B
4 m
3 m
A
E
1 m
3 m
D
5 m
Chapter 1 Solutions
Understanding Motor Controls
Ch. 1 - When installing a motor control system, list four...Ch. 1 - Prob. 2RQCh. 1 - Is the National Electrical Code a law?Ch. 1 - Explain the difference between manual control,...Ch. 1 - Prob. 5RQCh. 1 - Explain the difference between jogging and...Ch. 1 - Prob. 7RQCh. 1 - What agency requires employers to provide a...Ch. 1 - What is meant by the term ramping?
Ch. 1 - What is the most important function of any control...
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- Determine the moment created by the force about the point O. Express your answer as a Cartesian vector.arrow_forward4. An impeller rotating at 1150 rpm has the following data: b, = 1 ¼ in., b2 = ¾ in., d, = 7 in., d2 = 15 in., B1 = 18", B2 = 20°, cross-sectional area A = Db if vane thickness is neglected. Assuming radial inlet flow, determine the theoretical capacity in gpm head in ft horsepower 5. If the impeller in Problem (4) develops an actual head of 82 ft and delivers 850 gpm at the point of maximum efficiency and requires 22 BHP. Determine overall pump efficiency virtual velocities V2 and W2arrow_forward(30 pts) Problem 1 A thin uniform rod of mass m and length 2r rests in a smooth hemispherical bowl of radius r. A moment M mgr 4 is applied to the rod. Assume that the bowl is fixed and its rim is in the horizontal plane. HINT: It will help you to find the length l of that portion of the rod that remains outside the bowl. M 2r a) How many degrees of freedom does this system have? b) Write an equation for the virtual work in terms of the angle 0 and the motion of the center of mass (TF) c) Derive an equation for the variation in the position of the center of mass (i.e., Sŕƒ) a. HINT: Use the center of the bowl as the coordinate system origin for the problem. d) In the case of no applied moment (i.e., M 0), derive an equation that can be used to solve for the equilibrium angle of the rod. DO NOT solve the equation e) In the case of an applied moment (i.e., M = mgr = -) derive an equation that can be used to 4 solve for the equilibrium angle of the rod. DO NOT solve the equation. f) Can…arrow_forward
- Please show all work step by steparrow_forwardCopyright 2013 Pearson Education, publishing as Prentice Hall 2. Determine the force that the jaws J of the metal cutters exert on the smooth cable C if 100-N forces are applied to the handles. The jaws are pinned at E and A, and D and B. There is also a pin at F. E 400 mm 15° D B 30 mm² 80 mm/ 20 mm 15° $15° 20 mm 400 mm 15° 100 N 100 N 15°arrow_forwardDraw for it make a match which directionarrow_forward
- Q.1) Block A is connected to block B by a pulley system as shown. The weights of blocks A and B are 100 lbs and 70 lbs, respectively. Assume negligible friction between the rope and all pulleys as well as between block B and the incline and neglect the mass of all pulleys and cables. Determine the angle 0 required to keep the system in equilibrium. (At least two FBDs must be drawn for full credit) B Ꮎ 000arrow_forwardpls solvearrow_forward+1. 0,63 fin r= 0.051 P The stepped rod in sketch is subjected to a tensile force that varies between 4000 and 7000 lb. The rod has a machined surface finish everywhere except the shoulder area, where a grinding operation has been performed to improve the fatigue resistance of the rod. Using a 99% probability of survival, determine the safety factor for infinite life if the rod is made of AISI 1080 steel, quenched and tempered at 800°c Use the Goodman line. Does the part fail at the fillet? Explainarrow_forward
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