Lahore University of Management Sciences
EE 352 – Electromechanical Systems
Instructor
Room No.
Office Hours
Email
Telephone
Secretary/TA
TA Office Hours
Course URL (if any)
Spring 2014
Dr. Aamir Rashid
9-345A
TR 9:30am to 10:30 am
aamir.rashid@lums.edu.pk
8358
Course Basics
Credit Hours
Lecture(s)
Lab (per week)
Tutorial (per week)
Course Distribution
Core
Elective
Open for Student Category
Close for Student Category
4
Nbr of Lec(s) Per Week
Nbr of Lec(s) Per Week
Nbr of Lec(s) Per Week
2
2
1
Duration
Duration
Duration
75 mins
100 mins
50 mins
EE
Junior / Senior
Freshman / Sophomore
COURSE DESCRIPTION
This course introduces the fundamentals of DC and AC electromechanical systems to be used for variety of applications. The course starts with
the study of fundamental physical laws of electrical devices and appropriate mathematical models are developed to understand their operation
and design. The physical construction, operation and mathematical design of transformers, DC machines, and AC machines will be discussed in
detail. The speed control of rotating machines will also be introduced.
COURSE PREREQUISITE(S)
•
•
•
EE 242 Circuit II (Required)
PHY 102 Electricity and Magnetism (Required)
EE 330 EM Fields and Waves (Recommended)
COURSE OBJECTIVES
•
The main goal of this course is to teach the basic principles of electromechanical System such as electromagnetic actuators,
rotating electrical machines and transformers
Learning Outcomes
•
•
•
At the end of the course the students will be able to understand the operation, construction and design of nearly all types of
electromechanical systems.
Students will be expected to demonstrate their level of understanding through the laboratory work and solving exam problems.
They will also be able to identify the areas of research interests in this field.
Lahore University of Management Sciences
Grading Breakup and Policy
Assignment(s):
Home Work: 5%
Quizzes: 20%
Class Participation:
Attendance:
Midterm Examination: 35%
Final Examination: 40%
Lab grades will be assigned separately. Passing grades in both the lab and the course will be required for successful completion of the course.
Quiz: TBA
Practical Demonstration: TBA
Attendance: TBA
Lab Manual: TBA
Examination Detail
Midterm
Exam
Yes/No: Yes
Combine Separate: Combine
Duration: 150 mins
Preferred Date:
Exam Specifications: Calculators allowed, 1-page hand-written formula sheet allowed
Final Exam
Yes/No: Yes
Combine Separate: Combine
Duration: 150 mins
Exam Specifications: Calculators allowed, 2-page hand-written formula sheet allowed
COURSE OVERVIEW
Week/
Lecture/
Module
•
•
Recommended
Readings
Topics
Introduction to Machinery Principles, Laws
governing linear and rotational motion, The
Magnetic Field, Magnetic circuits
Electric losses in ferromagnetic materials,
Interaction of changing magnetic fields,
transformer , motor and generator principle
basics
1.1, 1.2, 1.3, 1.4
1.4, 1.5, 1.6, 1.7
•
The Ideal Transformer, Theory of Operation of
single phase transformer
2.3, 2.4
•
Equivalent Circuit of a Transformer,
Transformer Voltage Regulation and Efficiency
2.5, 2.7
Per-unit system, Auto Transformers
•
•
2.6, 2.9
A simple rotating loop between curved pole
faces, Commutation in a simple four-loop DC
8.1, 8.2
Objectives/
Application
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machine
•
Problems with commutation in real machines,
The internal generated voltage and induced
torque equations of DC machines
8.4, 8.5
The construction of DC Machines, Power flow
and losses in DC Machines
8.6, 8.7
Equivalent circuit, Magnetization curve
9.2, 9.3
•
Separately excited and Shunt DC Motors,
Permanent Magnet DC Motor
9.4, 9.5
•
Series DC Motor, The compound DC Motor,
DC motor efficiency calculations
9.6, 9.7, 9.10
•
Separately excited DC Generator, Shunt DC
Generator
9.12, 9.13
•
Series DC Generator, compounded DC
Generators
9.14, 9.15, 9.16
•
A simple loop in a uniform magnetic field, The
rotating magnetic field
4.1, 4.2
•
Induced voltage in an AC machine, Induced
torque in an AC machine
4.3, 4.4, 4.5
•
AC Machines power flows and losses, Voltage
and Speed regulation
4.7, 4.8
•
•
•
•
•
•
•
•
•
•
•
The speed of rotation of a synchronous
generator, The internal generated voltage of a
synchronous generator
The equivalent circuit of a synchronous
generator, The phasor diagram of a
synchronous generator
The synchronous generator operating alone,
Parallel operation of AC Generators
Basic principles of motor operation, Steadystate synchronous motor operation
Effect of load changes on a synchronous motor
Power-factor correction, Starting synchronous
motors
5.2, 5.3
5.4, 5.5, 5.6
5.8, 5.9
6.1, 6.2
6.2, 6.3, 6.4
Basic induction motor concepts, Equivalent
circuit of induction motor
Power and Torque in Induction motors
7.2, 7.3
Torque-speed characteristics
7.5
Speed control of induction motors
7.9, 7.12
7.4
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The induction generator
Textbook(s)/Supplementary Readings
Text book:
Electric Machinery Fundamentals (4th Edition) by Stephen J. Chapman
th
Electric Machinery (6 Edition) by A.E. Fitzgerald; Charles Kingsley, Jr; Stephen D. Umans
Reference books:
Principles of Electric Machines and Power Electronics (2nd Edition ) by P.C. Sen
LAB EXPERIMENT LIST
1
Design of an Inductor using Ferrite Core using different core shapes like
(i) Toroid shape
(ii) E-I shape
(iii) E-E shape
2
Observe Voltage Regulation in a Single Phase Transformer for
(i) Resistive Load
(ii) Capacitive Load
and observe the same for an Auto-Transformer in Step up or Step down configuration
3
Draw the equivalent circuit of a Single Phase Transformer by doing
(i) Open Circuit Test
(ii) Short Circuit Test
4
Plot the magnetic characteristics (Open Circuit Characteristics) of the Separately Excited DC Generator and Shunt Generator.
5
Load Characteristics of a DC Shunt Generator or Self Excited Generator
6
Load Characteristics of a DC Series Machine (Motor & Generator)
7
Load Test of DC Shunt & Separately Excited Motors
8
Find out the different components of Voltage drop inside a DC Shunt Generator at different loads and plot the curves
9
Load Characteristics of a Single Phase Capacitor Start Induction Motor
10
Load Characteristics of a 3-Phase Squirrel Cage Induction Motor
11
To run an Induction Motor as an Induction Generator
12
To perform Synchronization of an Synchronous Generator (Alternator) with WAPDA Bus Bar