1

Jahangirabad Institute of Technology MOHAMMED WARIS SENAN

Assistant Professor

Semester 4th

, 2016

MASTER SCHEDULE: ELECTRICAL MACHINES & CONTROL SYSTEM (NEE – 409)

week 1 Class 1 Monday, February 2,2015

Introduction to EMAC

Single phase Transformer:

Introduction Principle.

Class 2 Tuesday, February 3,2015

Efficiency Voltage regulation, O.C.& S.C. Tests

week 1 Class 3 Wednesday, February 4,2015

Three Phase Transformer:

Three phase transformer connections.

Class 4 Thursday, February 5,2015

Auto Transformer: Volt- Amp relations,

Efficiency, Advantages & Disadvantages,

Applications.

week 1 Class 5 Friday, February 6,2015

D.C. Motors: Concept of starting, Speed control,

Losses and Efficiency.

Saturday, February 7,2015

No class (Sports Day)

Week 2 Monday, February 9,2015

No class (Sports Day)

Class 6 Tuesday, February 10,2015

numerical

Week 2 Class 7 Wednesday, February 11,2015

Test

Class 8 Thursday, February 12,2015

Three phase Induction Motor: Construction,

Equivalent circuit, Torque equation .

Week 2 Class 9 Friday, February 13,2015

torque- slip characteristics, Speed control of 3-

phase I.M.

Saturday, February 14,2015

No class (Holi day)

Week 3 Class 10 Monday, February 16,2015

Alternator: Construction, e.m.f. equation,

Voltage regulation and its determination by

synchronous impedance method.

Tuesday, February 17,2015

No class (Holi day)

Week 3 Class 11 Wednesday, February 18,2015

Synchronous Motor: Starting methods.

Class 12 Thursday, February 19,2015

Effect of excitation on line current (V-curves),

Synchronous condenser.

Week 3 Class 13 Friday, February 20,2015

Servo Motor: Two phase AC and DC servo

motors

Class 14 Saturday, February 21,2015

Construction of two phase AC servo motor. &

their applications.

Week 4 Class 15 Monday, February 23,2015

Numerical Problems.

Class 16 Tuesday, February 24,2015

Numerical Problems.

Week 4 Class 17 Wednesday, February 25,2015

Revision of entire unit.

Class 18 Thursday, February 26,2015

Test

Week 4 Class 19 Friday, February 27,2015

Modeling of Mechanical System: Linear

mechanical elements, Force-voltage and force-

current analogy.

Class 20 Saturday, February 28,2015

Electrical analog of simple mechanical systems.

2

Week 5 Class 21 Monday, March 2,2015

Concept of transfer function.

Class 22 Tuesday, March 3,2015

Determinations of transfer function for simple

systems. Week 5 Class 23 Wednesday, March 4,2015

Control System: Open loop & closed loop

controls systems.

Class 24 Thursday, March 5,2015

advantages and disadvantages of open and

closed loop system.

Week 5 Friday, March 6,2015

No class (Holi day)

Saturday, March 7,2015

No class (Holi day)

Week 6 Monday, March 9,2015

No Class (Sessional I)

Tuesday, March 10,2015

No Class (Sessional I)

Week 6 Wednesday, March 11,2015

No Class (Sessional I)

Class 25 Thursday, March 12,2015

Signals: Unit step, Unit ramp, Unit impulse.

Week 6 Class 26 Friday, March 13,2015

Periodic signals with their mathematical

representation and characteristics.

Class 27 Saturday, March 14,2015

Revision of the unit.

Week 7 Class 28 Monday, March 16,2015

Numerical Problems

Class 29 Tuesday, March 17,2015

Numerical Problems

Week 7 Class 30 Wednesday, March 18,2015

Time Response Analysis: Time response of a

standard second order system.(Through

Numeric Problems)

Class 31 Thursday, March 19,2015

Response specifications of second order

system. .(Through Numeric Problems)

Week 7 Class 32 Friday, March 20,2015

Stability: Concept and types of stability.

.(Through Numeric Problems)

Class 33 Saturday, March 21,2015

Routh Hurwitz Criterion and its application for

determination of stability. .(Through Numeric

Problems)

Week 8 Class 34 Monday, March 23,2015

Polar plot, Nyquist stability criterion and

assessment of stability. .(Through Numeric

Problems)

Class 35 Tuesday, March 24,2015

Polar plot, Nyquist stability criterion and

assessment of stability continue. .(Through

Numeric Problems)

Week 8 Class 36 Wednesday, March 25,2015

Numerical Problems Class 37 Thursday, March 26,2015

Numerical Problems

Week 8 Class 38 Friday, March 27,2015

Revision

Saturday, March 28,2015

No Class (Holi day)

Week 9 Class 39 Monday, March 30,2015

Test

Tuesday, March 31,2015

Root Locus Techniques: Concept of root

locus. Week 9 Class 40 Wednesday, April 01,2015

Construction of root loci. Thursday, April 02,2015

No class( Holiday)

Week 9 Class 41 Friday, April 03,2015

Bode plot, Gain margin and Phase margin and

their determination

Class 42 Saturday, April 04,2015

Bode plot, Gain margin and Phase margin and

their determination

Week 10 Class 43 Monday, April 06,2015

Bode plot, Gain margin and Phase margin and

their determination

Class 44 Tuesday, April 07,2015

Process control : Introduction to P, PI

controllers.

3

Week 10 Class 45 Wednesday, April 08,2015

PID controllers.

Class 46 Thursday, April 09,2015

Characteristics, representation and

applications.

Week 10 Class 47 Friday, April 10,2015

Numerical Problems on Induction machines

Class 48 Saturday, April 11,2015

Numerical Problems on Induction machines

Practice session-1. Practice session-2

Details are found in the following sections: General Information, Class Schedule, and Project Schedule.

GENERAL INFORMATION

Teaching Staff:

Mr. Mohammad Imran, JIT EE, mdimran_rbl@yahoo.com

Course Web Site: http://www.jit.edu.in

Class Meetings: JIT HoD Room EE

Goals :

This subject is combination of Electrical machine and control system.so main object of this

ourse will e to i ti ate stude t’s est k owledge a out oder day machines as well as the

controlling instruments with possible methods of control system. At the completion of the

course students should be able to describe the constructions/features/application/operation of

machines as well as all the methods of control.

Course Objectives:

A. At the time of Sessional Exam No. 1 (after approximately 24 (Fifty five minutes of lectures), the students

should be able describe the following:

1. Understand the concepts of transformers (single phase, three phase and auto.)

2. Construction and performance of DC motors.

3. Difference between Single phase and three phase Induction motor.

4. S C and O C test of transformer.

5. e.m.f. injection in rotor circuit of slip ring controls.

6. Equivalent circuit.

7. Speed control methods.

8. Construction and application of alternators.

9. Should know the operation modes of Single phase I.M.

4

10. Construction and application of synchronous motor.

B. By the time of Exam No. 2 (after approximately 25 lectures), the students should be able describe the

items listed below:

1. Synchronous condenser and servo motor.

2. Modeling of mechanical system.

3. Difference between open loop system and closed loop system.

4. Transfer function.

5. Routh Hurwitz criterion.

6. Nyquist plot, Root loci plot.

7. Applications of Bode plot.

8. Polar plot.

9. P, Pi and PID controllers.

Course Outcome:

1. Able to analyze the performance of the machines.

2. Able to design and calculate the losses, efficiency and parameters of the machines and transformers.

3. Able to verify the theoretical results with analytical solution.

4. Able to generate the concepts regarding basics of Electrical Engineering such as Active power, Reactive

Power, Power Factor will be enhanced.

5. Conversion.(Electrical to mechanical and vice versa)

Grading:

Based On Four Points:

1. Sessional Marks (2 hours paper/ 30 Marks)

2. Attendance (10 Marks)

3. Assignments (Total 5/5 Marks)

4. Class Test (Total 3 / 10 Marks)

Class Preparation and Participation:

Reading assignments are given in the Class Schedule for each class session. You are expected to come to class

prepared to discuss the readings and the suggested questions. Your individual class participation grade will be

based upon your in-class remarks during discussions.

5

Classes and Topics

Class 1 Monday, February 2,2015

The core of the power TRANSFORMER is usually made of laminated cold-rolled magnetic steel that is grain

oriented such that the rolling direction is the same as that of the flux lines. This type of core construction tends to

reduce the eddy current and hysteresis losses. The eddy current loss Pe

is proportional to the square of the product of the maximum flux density BM(T), the frequency f(Hz), and

thickness t(m) of the individual steel lamination.

Core and Shell Types

Transformers are constructed in either a shell or a core structure.The shell-type transformer is one where the

windings are completely surrounded by transformer steel in the plane of the coil.Core- type transformers are

those that are not shell type.

Class 2 Tuesday, February 3,2015

There is a need to assess the quality of a particular transformer design. The most important measure for

performance is the concept of efficiency, defined as follows:

Class 3 Wednesday, February 4,2015

6

Class 4 Thursday, February 5,2015

e.m.f. injection in rotor circuit of slip ring controls.

Auto Transformer: Volt- Amp relations, Efficiency, Advantages & Disadvantages, Applications.

Class 5 Friday, February 6,2015

Class 6 Tuesday, February 10,2015

Numerical practice

Class 7 Wednesday, February 11,2015

7

Test

Class 8 Thursday, February 12,2015

Three Phase Induction Motor:

Poly phase ac motors are primarily three-phase and are by far the largest electric prime mover in all of

industry. They are offered in ranges from 5 up to 50,000 hp and account for a large percentage of the total

motor industry in the world. In number of units, the three-phase squirrel cage induction motor is the most

common. It is commercially available from 1 hp up to several thousand horsepower and can be used on

conventional ac power or in conjunction with adjustable speed ac drives. Fans, pumps, and material handling

are the most common applications.

When the torque-speed characteristics of a conventional ac induction motor need to be modified, the wound

rotor induction motor is used. These motors replace the squirrel cage rotor with a wound rotor and slip rings.

External resistors are used to adjust the torque-speed characteristics for speed control in such applications as

ac cranes and elevators.

Class 9 Friday, February 13,2015

Induction Motor Analysis.

The characteristic algebraic equations for the steady-state power, torque and efficiency of the ac induction

motor are derived. All voltages and currents are in sinusoidal steady state. The derivation of the equations can be

simplified by defining the complex motor impedance as,

8

9

10

Class 10 Monday, February 16,2015

Alternator: Construction, e.m.f. equation, Voltage regulation and its determination by synchronous

impedance method.

AC Generators

Today, most electric power is produced by synchronous generators. Synchronous generators rotate at a

constant speed, called synchronous speed. This speed is dictated by the operating frequency of the system and

the machine structure. There are also ac generators that do not necessarily rotate at a fixed speed such as

those found in windmills (induction generators); these generators, however, account for only a very small

percentage of today’s ge erated power.

Class 11 Wednesday, February 18,2015

Synchronous motors

Single-phase synchronous motors are only used below about 1/10 of a horsepower. Typical applications are

timing and motion control, where low torque is required at fixed speeds.

Class 12 Thursday, February 19,2015

Synchronous condenser:

Power factor plays an important role in power engineering, In this session, we will discuss that how

synchronous condenser improves power factor of a circuit.

Class 13 Friday, February 20,2015

Servo Motor: Two phase AC and DC servo motors

In this session, we will discuss about types of servo motors.

Class 14 Saturday, February 21,2015

Construction of two phase AC servo motor. In this session, explanation about construction of the AC servo motor.

Class 15 Monday, February 23,2015

Numerical Problems.

Class 16 Tuesday, February 24,2015

Numerical Problems.

Class 17 Wednesday, February 25,2015

Revision of entire unit.

Class 18 Thursday, February 26,2015

Test.

Class 19 Friday, February 27,2015

Modeling of Mechanical System:

Linear mechanical elements, Force-voltage and force- current analogy.

Class 20 Saturday, February 28,2015

Electrical analog of simple mechanical systems.

Class 21 Monday, March 2,2015

11

Concept of transfer function.

Class 22 Tuesday, March 3,2015

Measures of the Steady-State Response

In the steady state, the accuracy of the time response is an indication of how well the dynamic response follows

a desired time trajectory. Usually a test signal (reference signal) is selected to measure accuracy. In this

configuration, the objective is to force y(t) to track a reference signal r(t) as close as possible.

Class 23 Wednesday, March 4,2015

Control System: Open loop & closed loop controls systems.

Definition, block diagram and examples of open and closed loop.

Class 24 Thursday, March 5,2015

Advantages and disadvantages of open and closed loop system.

Class 25 Thursday, March 12,2015

Signals: Unit step, Unit ramp, Unit impulse.

Definition and schematic representation.

Class 26 Friday, March 13,2015

Periodic signals with their mathematical representation and characteristics.

Class 27 Saturday, March 14,2015

Demagnetizing effect, permanent magnet dc motors.

Class 28 Monday, March 16,2015

Revision of the unit.

Class 29 Tuesday, March 17,2015

Numerical Problems

Class 30 Wednesday, March 18,2015

Numerical Problems.

12

Class 31 Thursday, March 19,2015

Time Response Analysis: Time response of a standard second order system.(Through Numeric Problems)

Class 32 Friday, March 20,2015

Numeric Problems

Class 33 Saturday, March 21,2015

Numeric Problems

Class 34 Monday, March 23,2015

Numeric Problems

Class 35 Tuesday, March 24,2015

Numeric Problems

Class 36 Wednesday, March 25,2015

Numeric Problems

Class 37 Thursday, March 26,2015

Numeric Problems

Class 38 Friday, March 27,2015

Revision

Class 39 Monday, March 30,2015

test

Motors Class 40 Wednesday, April 01,2015

Construction of root loci. through numeric problem

Class 41 Friday, April 03,2015

Bode plot, Gain margin and Phase margin and their determination

(through numeric problem)

Class 42 Saturday, April 04,2015

Bode plot, Gain margin and Phase margin and their determination

(through numeric problem)

Class 43 Monday, April 06,2015

Bode plot, Gain margin and Phase margin and their determination

(through numeric problem)

Class 44 Tuesday, April 07,2015

13

Class 45 Wednesday, April 08,2015

14

Class 46 Thursday, April 09,2015

Characteristics, representation and applications.

Class 47 Friday, April 10,2015

Numerical Problems on Induction machines

READING PACKET TABLE OF CONTENTS

Reading Title

1. Dr. P. S. bimbhra, Electrical Machinery , Khanna Publisher

2. Ashfaq Hussain, Elctrical Machines , Dhanpat Rai & Company

3. Bakshi & Bakshi, Electromechanical Energy Conversion-II

4. Fitzerald, A.E., Kingsley and S.D. Umans, Electric Machinery ,Mc Graw Hill.

5. S.kartiya and sons. S.Hasan Sayeed