Industrial Motor Control
7th Edition
ISBN: 9781133691808
Author: Stephen Herman
Publisher: Cengage Learning
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Chapter 1, Problem 3RQ
Is the National Electrical Code® a law?
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motor supplies 200 kW at 6 Hz to flange A of the shaft shown in Figure. Gear B transfers 125 W of power to operating machinery in the factory, and the remaining power in the shaft is mansferred by gear D. Shafts (1) and (2) are solid aluminum (G = 28 GPa) shafts that have the same diameter and an allowable shear stress of t= 40 MPa. Shaft (3) is a solid steel (G = 80 GPa) shaft with an allowable shear stress of t = 55 MPa. Determine:
a) the minimum permissible diameter for aluminum shafts (1) and (2)
b) the minimum permissible diameter for steel shaft (3).
c) the rotation angle of gear D with respect to flange A if the shafts have the minimum permissible diameters as determined in (a) and (b).
Chapter 1 Solutions
Industrial Motor Control
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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