A speed control system of an armature-controlled DC motor uses the back emf voltage of the motor as a feedback signal. (a) Draw the block diagram of this system (see Equation 2.66). (b) Calculate the steady- state error of this system to a step input command set- ting the speed to a new level. Assume that R, = L. = J = b = 1, the motor constant is Km = 1, and = 1. (c) Select a feedback gain for the back emf P5.10 %3D K, = signal to yield a step response with an overshoot of 15%.

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P5.10 A speed control system of an armature-controlled
DC motor uses the back emf voltage of the motor as a
feedback signal. (a) Draw the block diagram of this
system (see Equation 2.66). (b) Calculate the steady-
state error of this system to a step input command set-
ting the speed to a new level. Assume that R, = L. =
J = b = 1, the motor constant is Km = 1, and
K, = 1. (c) Select a feedback gain for the back emf
signal to yield a step response with an overshoot
of 15%.
%3!
Transcribed Image Text:P5.10 A speed control system of an armature-controlled DC motor uses the back emf voltage of the motor as a feedback signal. (a) Draw the block diagram of this system (see Equation 2.66). (b) Calculate the steady- state error of this system to a step input command set- ting the speed to a new level. Assume that R, = L. = J = b = 1, the motor constant is Km = 1, and K, = 1. (c) Select a feedback gain for the back emf signal to yield a step response with an overshoot of 15%. %3!
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