Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Textbook Question
Chapter 32, Problem 6SQ
Describe the operation of Figure 32–5 (B) by adding jumper wire “A” to the original circuit.
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consider the circuit below. Assume it uses ideal diodes with the details specified above. the left side of the circuit is basically a wheatstone bridge, hooked to the right side, which is a differential op amp. a) what is the voltage between junctions "A" and "B" if R2 is 201 ohms? b) what are the minimum and maximum values of R2 can be without the op amp hitting saturation?remember that for the diodes to be ideal you they have to have a turn on voltage of 0.6 volts.
The capacitors in the circuit shown below have no energy stored in them and then switch “S1” closes at time t=0. Assume the ideal op amp does not saturate. As stated above assume the diodes are ideal with parameters specified above.
Diodes are at 0.6 Volts
Show the derivations of the mathematical equations for v(t) at Locations A and B for t≥ 0
Phase (deg)
Magnitude (dB)
-20
-40
-60
-80
-100
°
-90
-180
-270
10-1
(i)
°
Problem 5
Consider a unity (negative) feedback system with a proportional controller. The Bode plot of the
plant transfer function G(s) is given as below.
System: sys
Frequency (rad/s): 1
Magnitude (dB): 13.9
System: sys
Frequency (rad/s): 14.9
Magnitude (dB): 6.58
System: sys
Frequency (rad/s): 1
Phase (deg): -9.76
10°
System: sys
Frequency (rad/s): 25.6
Magnitude (dB): -0.0703
System: sys
Frequency (rad/s): 41.3
Magnitude (dB): -8.06
System: sys
Frequency (rad/s): 200
Magnitude (dB): -44.4
System: sys
Frequency (rad/s): 14.9
Phase (deg): -110
System: sys
Frequency (rad/s): 25.6
Phase (deg): -148
System: sys
Frequency (rad/s): 41.3
Phase (deg): -180
System: sys
Frequency (rad/s): 200
Phase (deg): -247
101
Frequency (rad/s)
102
Find the gain crossover frequency, phase crossover frequency, gain margin and phase
margin of the system. Is the closed-loop system stable?
(ii)
What is the steady-state error of the…
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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