1

COURSE PLANNER

SUBJECT: CONTROL OF ELECTRICAL

DRIVE[2160913]

B.E. – THIRD YEAR

Class – Electrical 2014

Term: 16/2 (DEC-16 to APR-17)

Faculty: PROF. C. P.VAIDYA PROF. P. D. SOLANKI

PROF. T. S. GAJJAR PROF. N. B. KANTHARIA

CONTENTS:

1. Course Outcomes

2. Course Contents [Syllabus]

3. List of Reference Books

4. List of Experiments

5. Major Equipment Required for Experiments

6. List of Open Source Software and Learning websites required for experiments

7. Active Learning Assignment and Tutorial.

INSTRUCTIONS:

1. This set of Assignment-Tutorial consist the collection of questions of past GTU Question papers.

2. Attend the questions which are frequently asked in GTU exams and/or the questions which are

Bold Marked.

3. Students should make a separate Chapter wise Files [Write in File Pages] to solve these

Questions.

4. Students must solve these given set of Assignments by themselves only.

5. Assessment of given assignment should be done regularly after completion of each chapter by

Students from the respective faculty members.

2

1. Course Outcomes

SUBJECT NAME: Control of Electric Drive [2160913]

After learning the course the students should be able to:

1. Select a drive for a particular application based on power rating.

2. Select a drive based on mechanical characteristics for a particular drive application.

3. Operate and maintain solid state drives for speed control of DC and AC machines.

4. Operate and maintain solid state drives for speed control of various special electrical machines.

3

2. Course Contents

[Syllabus]

Subject Code: 2160913

Subject Name: Control of Electric Drive

Sr.

No

Topics Total

Hrs.

%

Weightage

1

Introduction: History Of Dc Drive -Electronic Control -Solid

State Control • State Of Art Of Dc Drive • Block Diagram Of

Drive - Part Of Electrical Drive

2

06

2 Dynamics of Electrical Drives:Types of Load-Quadratal

diagram of speed –torque characteristics – Types and

Characteristics of load torque – Dynamics of motor- load

combination – steady state & transient stability of an electrical

drive – Determination of moment of inertia.

06 15

3 Dc Drives:Speed-torque characteristics: DC separately excited,

shunt and series motors. Modified speed-torque characteristics

with resistive control; Analysis for speed-torque equations in

terms of firing angle and duty cycle; Modified speed-torque

characteristics with phase controlled converters for continuous

conduction and discontinuous conduction, Modified speed-torque

characteristics with DC-DC converters for continuous conduction

and discontinuous conduction; Closed loop speed control schemes;

Dynamic model of DC machine; Speed and position control

scheme using the dynamic model.

10 24

4 Scalar control of AC machines:Review of V/f control; VSI

based Induction Motor control; Harmonics and Harmonic torques

with VSI; Selection of carrier frequency and harmonic spectrum;

Advantages of V/f control over other scalar control techniques;

Various operating modes for doubly fed induction machine: Sub-

synchronous and super-synchronous motoring and generating;

Static Scherbius drive: Design aspects like speed range, power

factor, ratings of components; Closed-loop speed control schemes:

slip control, current limit control; CSI fed IM; Speed-torque

characteristics with current source; Comparison with VSI based

control

10

24

5 Dynamic modeling and Vector control: Dynamic model of induction motor:ABC reference frame,

Arbitrary reference frame, stationary reference frame, rotating

reference frame;Principle of Vector control, Field oriented control:

Stator Flux Control

and Rotor Flux Control; Direct torque control; Comparison of

10 21

4

FOC

and DTC, Introduction to Synchronous motor and BLDC machine

drive

6 Applications of Electric DrivesIntroduction to Solar and

batterypowered Drives; Introduction to traction Drives; Servo

motor drive requirement –control and implementation

04 10

5

3. List of Reference Books

1. Bimal K. Bose, “Modern Power Electronics and AC Drives”, Pearson Education

2. VedamSubrahmanyam, “Electric Drives”, TMH (I), Second Edition,

3. G..K. Dubey, “ FundamentalsofElectrical Drives”, Narosa Publishing House, New Delhi, 2nded. 2001.

4. G. K. Dubey, “Power Semiconductor Controlled Drives”, Prentice Hall International Edition. 1989.

5. J.M.D. Murphy and F.G. Turnbull, “Power Electronics Control of AC Motors”, Peragmo

6. R.Krishnan, “ElectricMotorDrives–Modeling,AnalysisandControl” PHI

7. Werner Leonhard, “Control of Electrical Drives”, 3rd ed., Springer, 2001

8. Theodore Wildi, “Electrical Machines, Drives and Power Systems”, sixth edition, Pearson

6

4 List of Experiments

SR.

NO. NAME OF PRACTICLES

1 Overview about electrical drive lab.

2 To study different methods of speed control of dc motor

3 To study and simulate speed control of separately excited dc motor with 1-phase semi

controlled drive.

4 To study and simulate speed control of separately excited dc motor with 1-phase fully

controlled drive.

5 To study and simulate scalar controlled of dc motor with armature resistance current

control method.

6 To study and simulate scalar controlled dc motor of closed loop voltage control method.

7a To study and simulate inverter based open loop speed control of induction motor by 120

mode of conduction.

7b To study and simulate inverter based open loop speed control of induction motor by 180

mode of conduction.

8 To study and simulate single phase ac voltage controller based speed control of ac motor

9

To study & simulate 3-phase to 2-phase transformation.

a. Park transformation

b. Clark transformation

10 To study and obtain i-v and p-v characteristics of pv solar panel.

7

5.Major Equipment Required for Experiments

Lab set up following.

1. Computer Lab with 20 computers.

COMPUTER SYSTEM

CPU INTEL P4 2.93 GHZ CORE2 DUO E7500

MOTHER BOARD INTEL P4 DG41RQ

HARD DISK 320 GB WESTERN DIGITAL

SALES

RAM 1GB DDR-2 PC 677 MHZ DYNET

CABINET P4 INTEX WITH SMPS

MONITER 15.6'' LCD LG

KEY BOARD 104 LOGITECH

MOUSE OPTICAL LOGITECH

2. Solar Panel of 80 W ratting.

8

6 List of Open Source Software and Learning

Websites Required for Experiments

1. http://www.electrical4u.com/electrical-drives/

2. http://nptel.ac.in/courses/108104011/

3. http://electrical4u.com/types-of-dc-motor-separately-excited-shunt-series- compound-dc-motor/

4. https://www.wisconline.com/learn/careerclusters/stem/iau13208/fundamentals- of-a-dc-motor

5. http://www.ni.com/white-paper/3656/en/

6.http://www.minarik.com/drupal/content/products/Electrical%3E%3EControl%3E%3EDrives%3E%3EDC

%20Drives/0

7. http://electrical-engineering-portal.com/download-center/books-and-guides/siemens-basics-of-

energy/basics-of-dc-drives

8. https://www.joliettech.com/products/dc-variable-speed-drives/dc-drive-fundamentals/

9. http://www.eetimes.com/

10. http://www.ohioelectricmotors.com/a-guide-to-electric-drives-and-dc-motor-control-688

11.http://www.slideshare.net/psksiva13/63814075electrical-drivesandcontrollecturenotes

12. http://metalab.uniten.edu.my

9

7 Active Learning Assignment and Tutorial.

1. Preparation of Power Point Slides which Include Videos, Animation, Pictures and Graphics for

better Understanding theory and practical work. 2. Tutorial

ATTEMPT ALL

SR

NO. QUESTION YEAR MARKS

1 Give the comparison of A.C & D.C drives.

2 Define Electrical drive. Draw the block diagram of electrical

drive & explain each part of it. 2016 07

3 What is electric drive? Advantages of electrical drive. 2016 07

Chapter-1 Introduction:

History Of Dc Drive -Electronic Control -Solid State Control • State Of Art Of

Dc Drive • Block Diagram Of Drive - Part Of Electrical Drive

10

Chapter-2 Dynamics of Electrical Drives :Types of Load-Quadratal diagram of speed –

torque characteristics – Types and Characteristics of load torque – Dynamics of

motor- load combination – steady state & transient stability of an electrical drive

– Determination of moment of inertia.

ATTEMPT ANY THREE:

SR.

NO QUESTION YEAR MARK

1

Explain Four- Quadrate operation of motor driving a hoist load.

OR

Explain speed torque conventions and multi quadrant operation

of drives.

OR

Explain the four quadrant diagram of speed torque

characteristic using hoist load.

2016 07

2 Explain drive parameter, (1) Loads with rotational motion. (2) Loads

with translational motion. 2016 07

3

Explain various types of Load Characteristics for Different Load

Torque

OR

Explain the nature and classification of load torques.

2016 07

5 Explain the Fundamental Torque equation for electrical drive.

6

Derive the condition for steady state stability equilibrium of an

Electrical Drive, For sudden acceleration and deceleration in

Motor-Load system.

2016 07

7

Derive the equation for steady state stability of motor-Load system.

OR

Explain steady-state and transient stability of an electric drive.

2016 07

8 Explain Moment of Inertia and explain how to determine its value?

11

Chapter-3 Dc Drives: Speed-torque characteristics: DC separately excited, shunt and series

motors. Modified speed-torque characteristics with resistive control; Analysis for

speed-torque equations in terms of firing angle and duty cycle; Modified speed-

torque characteristics with phase controlled converters for continuous conduction

and discontinuous conduction, Modified speed-torque characteristics with DC-DC

converters for continuous conduction and discontinuous conduction; Closed loop

speed control schemes; Dynamic model of DC machine; Speed and position control

scheme using the dynamic model.

ATTEMPT ANY FIVE:

SR

NO. QUESTION YEAR MARKS

1

Draw & explain speed–torque characteristics of D.C motor.

OR

Explain speed torque characteristics of DC series motor, DC shunt

motor ,and PMDC motor

2016 07

2 Briefly explain different speed control methods of D.C motor

drive. 2016 07

3

Derive transfer function of separately excited D.C motor (D.C

motor drive) with armature control & draw block diagram or

dynamic model of it.

OR

Explain the dynamic model of dc motor drive.

2016 07

4

Derive transfer function of separately excited D.C motor (D.C

motor drive) with field control & draw block diagram or

dynamic model of it.

OR

Explain the dynamic model of dc motor drive.

2016 07

5 Explain closed loop speed control of DC motor drive using Block

diagram.

6 Explain closed loop position control of DC motor drive using Block

diagram.

7 Explain single phase fully controlled rectifier with CCM and DCM

8 Explain speed torque characteristics of DC series motor, DC shunt

motor ,and PMDC motor

09

A 200V dc series motor runs at 800rpm when operating at its full

load current of 10A. the motor resistance is 0.5Ω and magnetic

circuit can be assumed unsaturated, what will be the speed if (a) the

load torque is increase by 50% (b) the motor current is 5A.

2016 07

10

A 200V dc series motor has armature and field resistance of 0.2Ω

and 0.1Ω respectively. It takes a current of 20A from the supply

while running at 1300rpm. If an external resistance of 2Ω is added

in series with the motor calculate new armature current & speed.

2016 07

12

ATTEMPT ANY FIVE:

SR

NO. QUESTION YEAR MARKS

1

Explain Scalar control speed techniques for Induction motor.

OR

What are the disadvantages of scalar based speed control of

IM?

07

2 Explain constant torque and constant power region of Induction

Motor. 07

3 Explain difference between CSI and VSI. 07

4 Explain VSI fed Induction motor drive.

5 Explain the term Harmonics and Harmonic torques related with

VSI based drive. 07

6 Explain frequency controlled based speed control of IM. 07

7

Explain V/f speed control method for IM.

OR

Advantages of V/f control over other scalar control techniques

OR

Draw torque/speed characteristic of three phase Induction

motor and Explain V/F speed control of Induction motor.

07

8 Explain various operating modes for doubly fed induction

machine 07

9 Explain closed-loop speed control schemes with slip control &

current limit control

10 Explain Static Scherbius drive for speed control.

Chapter-4 Scalar control of AC machines :Review of V/f control; VSI based Induction

Motor control; Harmonics and Harmonic torques with VSI; Selection of carrier

frequency and harmonic spectrum; Advantages of V/f control over other scalar

control techniques; Various operating modes for doubly fed induction machine:

Sub-synchronous and super-synchronous motoring and generating; Static

Scherbius drive: Design aspects like speed range, power factor, ratings of

components; Closed-loop speed control schemes: slip control, current limit control;

CSI fed IM; Speed-torque characteristics with current source; Comparison with

VSI based control

13

Chapter-5 Dynamic modeling and Vector control: Dynamic model of induction motor:

ABC reference frame, Arbitrary reference frame, stationary reference frame,

rotating reference frame; Principle of Vector control, Field oriented control: Stator

Flux Control and Rotor Flux Control; Direct torque control; Comparison of FOC

and DTC, Introduction to Synchronous motor and BLDC machine drive.

ATTEMP ANY FIVE

SR

NO. QUESTION YEAR MARKS

1 State the advantages and applications of synchronous motor

drives. 2016 07

2

What is vector control method? Explain Advantage over

scalar speed control method of Induction motor.

OR

Explain the principle of vector control model for ac induction

motor drives.

2016 07

4

Derive and explain voltage controlled vector model of three

phase induction motor.

OR

Explain d-q model of induction motor

2016 07

5 Explain Park and Clarke Transformation Matrix. 07

6

Explain significance of dynamic modeling with fundamental

vector control model. Also State Assumptions made in deriving

vector control of Induction Motor.

07

8 Explain different Reference Frame Theorems for vector

controlled speed control of Three phase Induction motor. 07

9 Derive and explain Electromagnetic torque Te from arbitrary

reference frame model of induction motor. 07

10

Explain Flux vector estimation control method for voltage

control method. Also draw structure of Flux Vector

Estimation.

OR

Explain Field oriented vector control of IM of stator flux

estimation.

07

11 Explain Direct vector control model of Induction motor. 07

12 Explain Indirect vector control model of Induction motor. 07

13 Explain BLDC drive and synchronous motor drive in detail. 07

14 Comparison of FOC and DTC. 07

15 Explain Field oriented vector control of IM with rotor flux

estimation.

14

ATTEMP ANY THREE

SR

NO. QUESTION YEAR MARKS

1 Write disadvantages of solar pump drive using PMDC motor.

Explain working of solar pump drive using DC motor in detail.

2 Explain the basic structure of solar drives. 2016 07

3 Explain advantages & disadvantages of traction drives 2016 07

4 Explain working of solar pump drive using Induction motor. 2016 07

5

Explain working of solar pump drive using Battery.

OR

Explain basic structure of solar and battery powered drives.

2016 07

6

Explain working of servo motor drive & its advantages.

OR

Explain the servo motor drive requirement, control and

implementation.

2016 07

7 Explain working of D.C [PMDC] drive with chopper control for

electric vehicles [battery powered vehicles]

8 Explain working of Induction motor drive with VSI control for

electrical vehicles.

9 Explain control scheme & construction of D.C traction drive & its

disadvantages.

10 Explain construction & working of A.C traction drive. Mention its

advantages & limitations.

11 Write disadvantages of solar pump drive using PMDC motor.

Explain working of solar pump drive using DC motor in detail.

12 Explain working of solar pump drive using Induction motor.

Chapter-6 Applications of Electric Drives: Introduction to Solar and battery powered

Drives; Introduction to traction Drives; Servo motor drive requirement – control

and implementation