CONTROL SYSTEM:-

Introduction to control system:- Concept of feedback and Automatic control, Effects of

feedback,Objectives of control system, Definition of linear and nonlinear systems, Elementary
concepts ofsensitivity and robustness. Types of control systems, Servomechanisms and
regulators, examples offeedback control systems. Transfer function concept. Pole and Zeroes of a
transfer function. Propertiesof Transfer function.

Mathematical modeling of dynamic systems:- Translational systems, Rotational systems,

Mechanicalcoupling, Liquid level systems, Electrical analogy of Spring–Mass-Dashpot system.
Block diagramrepresentation of control systems. Block diagram algebra. Signal flow graph.
Mason’s gain formula. Control system components: Potentiometer, Synchros, Resolvers, Position
encoders. DC and AC tacho-generators. Actuators. Block diagram level description of feedback
control systems for positioncontrol, speed control of DC motors, temperature control, liquid level
control, voltage control of an Alternator.

Time domain analysis:- Time domain analysis of a standard second order closed loop system.
Concept of undamped natural frequency, damping, overshoot, rise time and settling time.
Dependence of time domain performance parameters on natural frequency and damping ratio.
Step and Impulse response of first and second order systems. Effects of Pole and Zeros on
transient response. Stability by pole location. Routh-Hurwitz criteria and applications.

Error Analysis:- Steady state errors in control systems due to step, ramp and parabolic inputs.
Concepts of system types and error constants.

Stability Analysis:- Root locus techniques, construction of Root Loci for simple systems. Effects
ofgain on the movement of Pole and Zeros.

Frequency domain analysis of linear system:- Bode plots, Polar plots, Nichols chart, Concept
ofresonance frequency of peak magnification. Nyquist criteria, measure of relative stability, phase
andgain margin. Determination of margins in Bode plot. Nichols chart. M-circle and M-Contours
inNichols chart.

Control System performance measure:- Improvement of system performance through

compensation. Lead, Lag and Lead- lag compensation, PI, PD and PID control.

State variable Analysis:- Concepts of state variables. State space model. Diagonalization of State
Matrix. Solution of state equations. Eigenvalues and Stability Analysis. Concept of controllability
and observability. Pole-placement by state feedback. Discrete-time systems. Difference
Equations. State-space models of linear discrete-time systems. Stability of linear discrete-time
systems.

Text books:-
1. Modern Control Engineering, K. Ogata, 4th Edition, Pearson Education
2. Control System Engineering, I. J. Nagrath & M. Gopal. New AgeInternational Publication.
 3. Control System Engineering, D. Roy Choudhury, PHI 4. Control System, A. Ambikapathy,
Khanna Publishing House 5. Automatic Control Systems, B.C. Kuo & F. Golnaraghi, 8th
Edition, PHI

Reference books:-
1. Control Engineering Theory & Practice, Bandyopadhyaya, PHI 2. Control systems, K.R. Varmah,
Mc Graw hill

3. Control System Engineering, Norman Nise, 5th Edition, John Wiley & Sons

4. Modern Control System, R.C. Dorf & R.H. Bishop, 11th Edition, PearsonEducation.

5. Control System Design, C. Goodwin Graham, F. Graebe F. Stefan, Salgado.E. Mario, PHI

6. Modeling & Control of dynamic system, Macia&Thaler, Thompson

7. Modern Control Technology Components & Systems, 3rd edition, C.T Kilian,Cengage Learning

8. Modern Control Engineering, Y. Singh & S. Janardhanan, Cengage Learning

9. Control System Engineering, R. Anandanatarajan& R. Ramesh Babu, ,SCITECH

10. Automatic Control system, A. William, Wolovich, Oxford

POWER ELECTRONICS
Introduction:- Concept of power electronics, application of power electronics, uncontrolled
converters,advantages and disadvantages of power electronics converters, power electronics
systems,power diodes, power transistors, power MOSFETS, IGBT and GTO.

PNPN devices:- Thyristors, brief description of members of Thyristor family with symbol, V-
Icharacteristics and applications. Two transistor model of SCR, SCR turn on methods,switching
characteristics, gate characteristics, ratings, SCR protection, series and paralleloperation, gate
triggering circuits, different commutation techniques of SCR.

Phase controlled converters:- Principle of operation of single phase and three phase half wave, half
controlled, full controlled converters with R, R-L and RLE loads, effects of freewheeling diodes and
source inductance on the performance of converters. External performance parameters of
converters, techniques of power factor improvement, single phase and three phase dual converters

DC-DC converters:- Principle of operation, control strategies, step up choppers, types of choppers
circuits based on quadrant of operation, performance parameters, multiphase choppers.

Inverters:- Definition, classification of inverters based on nature of input source, wave shape of
outputvoltage, method of commutation & connections. Principle of operation of single phase
andthree phase bridge inverter with R and R-L loads, performance parameters of inverters,methods of
voltage control and harmonic reduction of inverters.
Resonant Pulse Converters:- Introduction, Series Resonant inverter, Parallel Resonant inverter, Zero-
Current Switching Resonant converters, Zero-Voltage Switching Resonant converter, Two quadrant
Zero-Voltage Switching Resonant converter, Resonant DC link inverter.

Applications:- Speed control of AC and DC motors. HVDC transmission. Static circuit breaker,
UPS,static VAR controller.

Text books:-
1. Power Electronics, M.H. Rashid,4th Edition, Pearson
2. Power Electronics, P.S. Bimbhra, Khanna Publishing House.
3. Power Electronics, V.R. Moorthi, Oxford.
4. Power Electronics, M.D. Singh and K.B. Khanchandani, Tata Mc Graw Hill.

Reference books:-
1. Modern Power Electronics & AC drives, B.K. Bose, Prentice Hall
2. Power Electronics, Mohan,Undeland&Riobbins, Wiley India
3. Element of power Electronics, Phillip T Krein, Oxford.
4. Power Electronics systems, J.P. Agarwal, Pearson Education.
5. Analysis of Thyristor power conditioned motor, S.K. Pillai, University Press.
6. Power Electronics, M.S. Jamal Asgha, PHI.
7. Power Electronics : Principles and applications, J.M. Jacob, Thomson