EBK ELECTRICAL MOTOR CONTROLS FOR INTEG
5th Edition
ISBN: 8220101434760
Author: ROCKIS
Publisher: ATP
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Chapter 3.1, Problem 1CP
To determine
Whether the double insulated power tools required to have a plug with the grounding connection or not.
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K
Q1/ For the system G(s)=
(s+2)(s+4)(s+5)
H(s)=1
a. Draw the Bode log-magnitude and phase plots.
b. Find the range of K for stability from your Bode plots.
c. Evaluate gain margin, phase margin, zero dB frequency, and 180°
frequency from
your Bode plots for K = 200
Q3/A unity-feedback system with the forward transfer function
S(S+7)
is operating with a closed-loop step response that has 15% overshoot. Do the
following:
a. Evaluate the settling time.
b. Design a PD compensator to decrease the settling time by three times.
K
Q2/ Consider the system G(S)
H(S)=1.5 0.4923.
S(S+1)(S+2)
a. Evaluate the steady-state error for a unit ramp input.
b. Design a lag compensator to improve the steady-state error by a factor of
10(increase the static velocity error constant Kv to about 10 times) to get a new
dominant closed-loop poles. s=-0.3± j0.55. place the zero of the lag compensator
at s=-0.05
c. if R1= 10K, R2=5K2, R3= 10K2 design the lag compensator using Op amp
Chapter 3 Solutions
EBK ELECTRICAL MOTOR CONTROLS FOR INTEG
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