INDUSTRIAL MOTOR CONTROL
7th Edition
ISBN: 9780357670590
Author: Herman
Publisher: CENGAGE L
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Chapter 63, Problem 1RQ
To determine
The way in which the DIAC operates.
Expert Solution & Answer
Explanation of Solution
The bi directional device that is used to control the phase shift in thyristors is called the DIAC. The DIAC can be turned in both the polarities forward bias and the reverse bias above a certain voltage.
The DIAC operates in the same way as the unijunction transistor. The DIAC operates in both AC and DC. The DIAC is used to trigger the TRIAC and other thyristors family device.
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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:
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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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Chapter 63 Solutions
INDUSTRIAL MOTOR CONTROL
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