INDUSTRIAL MOTOR CONTROL
7th Edition
ISBN: 9780357670590
Author: Herman
Publisher: CENGAGE L
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Chapter 65, Problem 1RQ
To determine
The way in which pin 1 of an in line, integrated circuit is identified.
Expert Solution & Answer
Explanation of Solution
Consider the circuit shown in Figure 65-1 in the textbook.
The timer 555 IC is an integrated circuit that is used in various application like, pulse generation, oscillator and many more.
The pin 1 is identified in the integrated circuit as it is notch at one end or dot by one pin.
Therefore, the notch or dot helps in the identification in pin 1 of 555 timer.
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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).
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