Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 32, Problem 8SQ
To determine
Draw a schematic diagram for a two-speed control circuit using a standard duty selector switch for the “low” and “high” speeds. In the circuit, neglect “A” and “D” jumper wires and add a green pilot light for low speed and a red pilot light for high speed.
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EXAMPLE 4.4
In a binary symmetric communication (BSC) channel, the input bits transmitted over the channel
are either 0 or 1 with probabilities p and 1-p, respectively. Due to channel noise, errors are made.
As shown in Figure 4.4, the channel is assumed to be symmetric, which means the probability of
receiving 1 when 0 is transmitted is the same as the probability of receiving 0 when 1 is transmit-
ted. The conditional probabilities of error are assumed to be each e. Determine the average prob-
ability of error, also known as the bit error rate, as well as the a posteriori probabilities.
What is the bandwidth requirement in Hz for baseband binary transmission at 64 kbps, if the roll-off factor is 0.25?
EXAMPLE 6.4
Suppose the roll-off factor is 25% and the bandwidth of a baseband transmission system satisfying
the Nyquist criterion is 30 kHz. Determine the bit rate.
Solution
1+α
1
Chapter 32 Solutions
Electric Motor Control
Ch. 32 - Prob. 1SQCh. 32 - Prob. 2SQCh. 32 - What will happen if terminals T5 and T6 in Figure...Ch. 32 - Is the motor operating at high speed or low speed...Ch. 32 - Describe the operation of the line diagram in...Ch. 32 - Describe the operation of Figure 325 (B) by adding...Ch. 32 - In Figure 327, the motor cannot be started in high...Ch. 32 - Prob. 8SQ
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