Industrial Motor Control
7th Edition
ISBN: 9781133691808
Author: Stephen Herman
Publisher: Cengage Learning
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Chapter 18, Problem 2RQ
To determine
The way in which it is possible for the two-wire control circuit to control the operation of a three phase motor.
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De Moivre’s Theorem
hand-written solutions only, please.
Determine the shear flow qqq for the given profile when the shear forces acting at the torsional center are Qy=30Q_y = 30Qy=30 kN and Qz=20Q_z = 20Qz=20 kN. Also, calculate qmaxq_{\max}qmax and τmax\tau_{\max}τmax.
Given:Iy=10.5×106I_y = 10.5 \times 10^6Iy=10.5×106 mm4^44,Iz=20.8×106I_z = 20.8 \times 10^6Iz=20.8×106 mm4^44,Iyz=6×106I_{yz} = 6 \times 10^6Iyz=6×106 mm4^44.
Additional parameters:αy=0.5714\alpha_y = 0.5714αy=0.5714,αz=0.2885\alpha_z = 0.2885αz=0.2885,γ=1.1974\gamma = 1.1974γ=1.1974.
(Check hint: τmax\tau_{\max}τmax should be approximately 30 MPa.)
Chapter 18 Solutions
Industrial Motor Control
Ch. 18 - What are the two major types of control circuits?Ch. 18 - Prob. 2RQCh. 18 - Refer to the schematic shown in Figure 184. What...Ch. 18 - Refer to the schematic shown in Figure 184. What...Ch. 18 - What generally characterizes a three-wire control...Ch. 18 - Explain the function of a holding contact.Ch. 18 - Prob. 7RQ
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