21EC43 Circuits & Controls syllabus for EC

Basic concepts and network theorems

Types of Sources, Loop analysis, Nodal analysis with independent DC and AC Excitations. (Textbook 1: 2.3, 4.1, 4.2, 4.3, 4.4, 10.6) Super position theorem, Thevenin’s theorem, Norton’s Theorem, Maximum Power transfer Theorem. (Textbook 2: 9.2, 9.4, 9.5, 9.7)

Two port networks:

Short- circuit Admittance parameters, Open- circuit Impedance parameters, Transmission parameters, Hybrid parameters (Textbook 3: 11.1, 11.2, 11.3, 11.4, 11.5)

Laplace transform and its Applications:

Step Ramp, Impulse, Solution of networks using Laplace transform, Initial value and final value theorem (Textbook 3: 7.1, 7.2, 7.4, 7.7, 8.4)

Basic Concepts and representation:

Types of control systems, effect of feedback systems, differential equation of physical systems (only electrical systems), Introduction to block diagrams, transfer functions, Signal Flow Graphs (Textbook 4: Chapter 1.1, 2.2, 2.4, 2.5, 2.6)

Time Response analysis:

Time response of first order systems. Time response of second order systems, time response specifications of second order systems (Textbook 4: Chapter 5.3, 5.4)

Stability Analysis:

Concepts of stability necessary condition for stability, Routh stability criterion, relative stability Analysis (Textbook 4: Chapter 5.3, 5.4, 6.1, 6.2, 6.4, 6.5)

Root locus:

Introduction the root locus concepts, construction of root loci

(Textbook 4: 7.1, 7.2, 7.3)

Frequency Domain analysis and stability:

Correlation between time and frequency response and Bode plots

(Textbook 4: 8.1, 8.2, 8.4)

State Variable Analysis:

Introduction to state variable analysis: Concepts of state, state variable and state models. State model for Linear continuous –Time systems, solution of state equations.

(Textbook 4: 12.2, 12.3, 12.6)

PRACTICAL COMPONENT OF IPCC

Using suitable hardware and simulation software, demonstrate the operation of the following circuits:

Experiments

1 Verification of Superposition theorem

2 Verification of Thevenin’s theorem

3 Speed torque characteristics of i)AC Servomotor ii) DC Servomotors

4 Determination of time response specification of a second order Under damped System, for different damping factors.

5 Determination of frequency response of a second order System

6 Determination of frequency response of a lead lag compensator

7 Using Suitable simulation package study of speed control of DC motor using i) Armature control ii) Field control

8 Using suitable simulation package, draw Root locus & Bode plot of the given transfer function. Demonstration Experiments (For CIE only, not for SEE)

9 Using suitable simulation package, obtain the time response from state model of a system.

10 Implementation of PI, PD Controllers.

11 Implement a PID Controller and hence realize an Error Detector.

12 Demonstrate the effect of PI, PD and PID controller on the system response.

Course Outcomes

At the end of the course the student will be able to:

1. Analyse and solve Electric circuit, by applying, loop analysis, Nodal analysis and by applying network Theorems.

2. Evaluate two port parameters of a network and Apply Laplace transforms to solve electric networks.

3. Deduce transfer function of a given physical system, from differential equation representation or Block Diagram representation and SFG representation.

4. Calculate time response specifications and analyse the stability of the system.

5. Draw and analyse the effect of gain on system behaviour using root loci.

6. Perform frequency response Analysis and find the stability of the system.

7. Represent State model of the system and find the time response of the system.

Assessment Details (both CIE and SEE)

• The weightage of Continuous Internal Evaluation (CIE) is 50% and for Semester End Exam (SEE) is 50%.
• The minimum passing mark for the CIE is 40% of the maximum marks (20 marks).
• A student shall be deemed to have satisfied the academic requirements and earned the credits allotted to each subject/ course if the student secures not less than 35% (18 Marks out of 50) in the semester-end examination (SEE), and a minimum of 40% (40 marks out of 100) in the sum total of the CIE (Continuous Internal Evaluation) and SEE (Semester End Examination) taken together

CIE for the theory component of IPCC

Two Tests each of 20 Marks (duration 01 hour)

• First test at the end of 5th week of the semester
• Second test at the end of the 10th week of the semester

Two assignments each of 10 Marks

• First assignment at the end of 4th week of the semester
• Second assignment at the end of 9th week of the semester

Scaled-down marks of two tests and two assignments added will be CIE marks for the theory component of IPCC for 30 marks.

CIE for the practical component of IPCC

• On completion of every experiment/program in the laboratory, the students shall be evaluated and marks shall be awarded on the same day. The 15 marks are for conducting the experiment and preparation of the laboratory record, the other 05 marks shall be for the test conducted at the end of the semester.
• The CIE marks awarded in the case of the Practical component shall be based on the continuous evaluation of the laboratory report. Each experiment report can be evaluated for 10 marks. Marks of all experiments’ write-ups are added and scaled down to 15 marks.
• The laboratory test (duration 03 hours) at the end of the 15th week of the semester /after completion of all the experiments (whichever is early) shall be conducted for 50 marks and scaled down to 05 marks. Scaled-down marks of write-up evaluations and tests added will be CIE marks for the laboratory component of IPCC for 20 marks.

SEE for IPCC

Theory SEE will be conducted by University as per the scheduled timetable, with common question papers for the course (duration 03 hours)

• The question paper will have ten questions. Each question is set for 20 marks.
• There will be 2 questions from each module. Each of the two questions under a module (with a maximum of 3 sub-questions), should have a mix of topics under that module.
• The students have to answer 5 full questions, selecting one full question from each module.

The theory portion of the IPCC shall be for both CIE and SEE, whereas the practical portion will have a CIE component only. Questions mentioned in the SEE paper shall include questions from the practical component.

• The minimum marks to be secured in CIE to appear for SEE shall be the 12 (40% of maximum marks-30) in the theory component and 08 (40% of maximum marks -20) in the practical component. The laboratory component of the IPCC shall be for CIE only. However, in SEE, the questions from the laboratory component shall be included. The maximum of 04/05 questions to be set from the practical component of IPCC, the total marks of all questions should not be more than the 20 marks.

SEE will be conducted for 100 marks and students shall secure 35% of the maximum marks to qualify in the SEE. Marks secured out of 100 shall be reduced proportionally to 50.

Suggested Learning Resources:

Text Books

1. Engineering circuit analysis, William H Hayt, Jr, Jack E Kemmerly, Steven M Durbin, Mc Graw Hill Education, Indian Edition 8e.

2. Networks and Systems, D Roy Choudhury, New age international Publishers, second edition.

3. Network Analysis, M E Van Valkenburg, Pearson, 3e.

4. Control Systems Engineering, I J Nagrath, M. Gopal, New age international Publishers, Fifth edition.