Electric machinery fundamentals
5th Edition
ISBN: 9780073529547
Author: Chapman, Stephen J.
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 8, Problem 8.10Q
To determine
To state: The reason behind the use of starting resistor in a DC motor circuits.
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Q2:
(33 Marks)
Design FBD for manufacturing system where a conveyor belt is used to move a cart through a tunnel for
processing. The process begins when a worker presses a start push button located at the start of the conveyor.
Once the start push button is pressed, the cart moves forward along the conveyor belt and enters the tunnel.
When the cart reaches the end of the tunnel, it stops automatically and remains in place for 10-minutes to
complete a required operation, such as cooling or drying. After the 10-minute delay, the cart automatically
returns to the starting point where the worker is stationed. The system then waits for the worker to press the
start push button again, at which point the process is repeated.
Start PBO
Stop PBO
LSI
0
LS 2
Motor
1. Find the resolution, current and output voltage for a binary weighted resistor DAC of (applied binary
word is (locoj), the resistor values R = 12 kQ, Rf = 6 k2 and VR = 12 V.
2. Convert the following 5-bit digital values (ble 10) to analog, using the R-2R ladder. Assume that the
Vs = 10 V, R = Rf = 7 ks
K
Q4/ For the unity-feedback system where G(s) =
do the following:
a. Plot the Nyquist diagram.
(S+2)(S+4)(S+6)
b. Use your Nyquist diagram to find the range of gain, K, for stability
Chapter 8 Solutions
Electric machinery fundamentals
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