Answered: (f) More than two unstable open-loop…

(f) More than two unstable open-loop poles, DC gain is 1.25, with following Nyquist plot: 2 -1 -2 -3 -2 -1 0 1 2 Re{L(io) {(o)u

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.3P

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Concept explainers

Operational Amplifier

An operational amplifier also called op amp is an integrated circuit or analog circuit that takes input as a differential voltage and produces output as a single-ended voltage. It is an IC that can amplify weak electric signals.An op amp has one output pin and two input pins. The basic role of an opamp is to amplify the voltage difference between the two input voltages. It is also used in filtering or to perform mathematical operations or in signal conditioning.

Question

Each item below describes key characteristics of a particular system (that is, a plant transfer function).

For each system, describe the effect of proportional control on the stability of the closed-loop system.

Specifically, 1) what can you say for small gains, and 2) what for large gains? (E.g., stable, unstable, inconclusive.) Provide a short explanation of your answers, with sketches as necessary.

(f)
More than two unstable open-loop poles, DC gain is 1.25, with following Nyquist plot:
2
-1
-2
-3
-2
-1
0
1
2
Re{L(io)
{(o)u

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