ECET 3904 Electric Drives

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17 Οκτ 2013 (πριν από 4 χρόνια και 22 μέρες)

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ECET 3904



Electric

Drives

3
-
3
-
4

Course

Description:

This course c
overs basic
AC/DC electric
-
machine drives for speed/position control.


I
t presents an
i
ntegrated discussion of electric machines, power electronics, and control systems.


Computer
simulatio
ns

are used for understanding power
-
electronics based converters and the design of feedback
controllers
.


Applications

of electric drives can be found

in electric transportation, robotics, process
control, and energy conservation.


Prerequisite:

ECET 2310
and ECET 3500

Required Text

Electric Drives


An Integrated Approach
, Ned Mohan, Revised year 2003 edition
.

Course Outcomes

After successfully completing this course, students, will able to demonstrate that

they can do the
following
:

1.

Describe the structure of Electric Drive systems and their role in various applications such as
flexible production systems, energy conservation, renewable energy, transportation etc., making
Electric Drives an enabling technolo
gy.


2.

Understand the basic requirements placed by mechanical systems on electric drives.


3.

Review phasors and three
-
phase electric circuits.


4.

Understand the basic principles of power electronics in drives using switch
-
mode converters and
pulse width modul
ation to synthesize the voltages in dc and ac motor drives.


5.

Understand the basic concepts of magnetic circuits as applied to electric machines.


6.

Understand the two basic principles (generation of force and emf) that govern electromechanical
energy conve
rsion.


7.

Describe the operation of dc motor drives to satisfy four
-
quadrant operation to meet mechanical
load requirements.


8.

Design torque, speed
,

and position controller
s

of motor drives.


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9.

Clearly learn to use space vectors presented on a physical basis

to describe the operation of an ac
machine.


10.

Understand the basic principles of Permanent Magnet AC (Self
-
Synchronous AC) drives.


11.

Describe the operation of induction machines in steady state that allows them to be controlled in
induction
-
motor drives.


12.

Learn speed control of induction motor drives in an energy efficient manner using power
electronics.


13.

Learn the basic operation of stepper motors and switched
-
reluctance motor drives.


14.

Get an appreciation of power quality issues in powering electric dr
ives.


15.

Appreciate how the use of space vectors easily explains vector control of ac drives.


Topics Covered

1.

Introduction to electric drive systems.

2.

Understanding mechanical system requirements

for electric drives
.

3.

Review of basic electric circuits.

4.

Basic

understanding of switch
-
mode power electronic converters in electric drives.

5.

Magnetic circuits

6.

Basic principles of electro
-
mechanical energy conversion.

7.

DC
-
motor drives and electronically
-
commutated motor drives.

8.

Designing feedback controllers for motor d
rives.

9.

Introduction to AC machines and space vectors.

10.

Sinusoidal permanent magnet AC (brushless DC) drives, LCI
-
synchronous motor drives, and
synchronous generators.

11.

Induction
-
motors: balanced, sinusoidal steady state operation.

12.

Induction
-
motor drives: spe
ed control.

13.

Vector control of induction
-
motor drives.

14.

Reluctance drives: stepper
-
motor and switched
-
reluctance drives.

15.

Energy efficiency of electric drives and inverter
-
motor interactions.

16.

Powering electric drives: power quality issues.

17.

Ancillary issues in

drives: sensors, ASICs, and micro
-
controllers
.


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Assessment and Policies

Attendance

Roll will be taken daily.
You are responsible

for any missed notes, handouts, assignments,
announcements, etc.

Homework

Homework problems will be assigned, collected, and
graded. The purpose of the homework is to learn
the methods of problem solving, rather than being absolutely correct. More emphasis will be placed on
how the problem is solved as opposed to simply arriving at a correct answer. NO CREDIT WILL BE
GIVEN F
OR LATE HOMEWORK.

Exams

There will be two mid
-
term exams. They will be announced in class one week in advance. You will be
given
fifty

minutes of class time to take each exam. No makeup quizzes or tests will be given unless
previous arrangements are mad
e with your instructor. Otherwise, a grade of zero will be recorded for
any missed grades. In the case of extrem
e emergency
, contact your instructor as soon as possible.

Laboratory Experiments and Reporting

Laboratory experiments are an essential part of

ECET courses.
All

of the laboratory experiments are
real
-
time performed on physical devices. The ability to report technical information in a clear and
concise manner is one of the most important practical skills that a technically trained person can
de
velop.

If we were to rate the skills possessed by an individual trained to use and understand electrical and
electronic theory, the ability to communicate effectively in written English would surely rank as high
as, if not higher than the ability to constr
uct reliable circuits, make accurate measurements, and
understand the results of the experiments. The results and conclusions drawn from experimental
procedures are of little value unless they

can be communicated to others.

Students are required to docume
nt all laboratory activity in a bound, quadrule, composition notebook.
Adherence to the format will help ensure that the report is complete and well organized. Students are
graded for format, procedure, clarity and coherence, originality, grammar and spel
ling, accuracy, effort,
completeness, neatness and promptness.

SPSU requires a passing lab grade in order to pass the class.

Roll will be taken in each lab. No
makeup labs will be given unless previous arrangements are made with your instructor. Otherwi
se, a
grade of zero will be recorded for any missed labs. In the case of extreme emergencies, contact your
instructor as soon as possible.


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Final Exam

The final exam will be comprehensive covering all topics discussed in class
. You will be given one
hour
and fifty minutes

to take the exam. Taking the final exam is mandatory. There will be no
exemptions.

Evaluation Method


Course Evaluation

Grade Composition

Grade Scale

Attendance/Participation

5%

90


100

A

Homework

10%

80


89

B

Exams

40%

70


79

C

Lab

20%

60


69

D

Final Exam

25%

Below 60

F


General Information


Neatness on submitted work is important. Work that is sloppy and/or contains spelling and
grammatical errors will be penalized.

You may appeal any grade received. If you choose to appeal

a grade, the instructor reserves the right
to re
-
grade the entire test or assignment.
All appeals for re
-
evaluation of a grade must be made
within one week of the assignment being returned to you.

You are responsible for being academically honest as defi
ned by the academic dishonesty rules in the
general catalog.
Cheating will not be tolerated.

Students with disabilities who believe that they may need accommodations in this class are encouraged
to contact the counselor working with disabilities at (678)
915
-
7244 as soon as possible to better ensure
that such accommodations are implemented in a timely fashion.