ELK332E, G. Komurgoz - Deniz Yildirim - ELECTRICAL MACHINES II

Syllabus

Course Objectives

To provide an undergraduate level of knowledge on synchronous and DC machines used for generation of electric energy and driving industrial loads by means of basic magnetic field theory and energy conversion principles.

Course Description

Construction of synchronous machines, excitation fields and their Fourier analysis, two-axis theory of salient-pole machines, reactances, armature reaction in synchronous generators and motors, equivalent circuits, characteristics at no-load and full load condition, phasor diagrams, short-circuit ratio, short-circuit current, synchronization, starting of synchronous motors, active and reactive power regulation, excitation methods, torque equations. Armature reaction, commutation, generator and motor characteristics, speed control and starting methods of DC machines.

Course Outcomes

Students will have an understanding of the operating principles and characteristics of the synchronous and direct current machines.

Textbook

S. J. Chapman, Electric Machinery Fundamentals, 3rd ed., McGraw-Hill, 1999.

Please visit the book's web site for the current Errata and supplemantary materials of the textbook. (Textbook can be obtained from Literatur Bookstore on campus)

Other reference books that can be helpful for this course:

A. E. Fitzgerald, C. Kingsley, S. D. Umans, Electric Machinery, 5th ed., McGraw-Hill, 1990.
S. A. Nasar, Electric Machines and Power Systems, Vol. 1, McGraw-Hill, 1995.
P. C. Sen Principles of Electric Machines and Power Electronics, John-Wiley & Sons, 1989.
R. H. Englemann, W. H. Middendorf, Handbook of Electric Motors, Marcel Dekker, 1995.

Pre-requisite(s)

There is no pre-requisite(s) for this course, however, your success in this course heavily depends on the good knowledge of the following topics:

Phasor analysis of AC circuits, computing RMS and average values, power factor, meaning of leading and lagging power factors.
Apparent, real, and reactive powers in single- and three-phase power system.
Algebra with complex numbers, transformation from rectangular to polar coordinate and vice-versa.

The above subjects will not be covered/explained in the class - this course assumes you have sufficient knowledge of these topics. If you feel that your background on the above material is insufficient, you are advised to take a look at your circuit's and mathematic's notes and/or books.

Computer Requirement

Use of programs such as Matlab, Mathematica, Maple, Excel, etc. may be required for some problems

Division of Course Credit (%)

Mathematics and Basic Science ....: None
Engineering Science ...................: 100
Engineering Design .....................: None
Social Sciences .........................: None

Grading Policy

Term Project = 15% Two Midterm Exams = 40% Final = 45%

A minimum of 70% attendance to the lectures (10 out of 14 lectures) are required to enter the Final Exam. Students who do not satisfy this requirement will be given a grade of VF and will not allowed to take the Final Exam.

Exam Policy

A grade of 0 out of 100 in project and/or exams implies you were not present in the exam or did not submit your project.

Midterm exams and final exam will be open notes/open books.

Dishonesty behavior of any kind in exams and/or term project will not be tolerated at all. Failure to comply will result in a disciplinary action.

Project Policy

There will be a term project for this course and each student is going to investigate and present a topic related to the course content.

The due date for the term project is at the end of the semester, i.e. the last class date. You have to submit your project and the project report to me at the due date. There will be a presentation of your project to the class on the due date where you will be describing your project details. Final presentations will be limited to at most 15 minutes. Presentations must be prepared in a computer environment (hand-written presentations will not be accepted) and they will be held in a room where a computer and a data projector are available.

A brief guideline about the things that you should keep in mind when preparing a technical report and presentation is given in CourseMaterial page.

DISHONESTY BEHAVIORS AND ACTIONS OF ANY KIND IN THE TERM PROJECT WILL NOT BE TOLERATED AT ALL.

YOU MAY COMMUNICATE WITH THE OTHER STUDENTS REGARDING THE DESIGN OF YOUR SUPPLY. HOWEVER, YOU ARE NOT ALLOWED TO WORK IN GROUPS. ALL WORK MUST BE YOUR OWN.

FAILURE TO COMPLY WILL RESULT IN AN FF GRADE IN THE COURSE AND A DISCIPLINARY ACTION.

		Weekly Lecture Subjects
		The following timetable is approximate and is given for informational purposes only. The subjects and the dates may change depending on the subject's coverage .
		Week Subject
		Introduction, brief outline and the main purpose of this course. Synchronous machines: types and construction, excitation methods, Induced voltage and induced torque in AC machines, the effect of coil pitch, distributed windings in AC machines. Internal generated voltage of a synchronous generator, equivalent circuit, phasor diagram, power and torque in synchronous generators. Synchronous generator model parameters, short circuit ratio, synchronous generator operating alone. Parallel operation of AC generators, frequency-power and voltage-reactive power characteristics, operation of generators with large power systems. Transient stability of synchronous generators, short circuit transients, voltage, speed, frequency, apparent power, and power factor rating. Effect of salient poles: Direct- and quadrature- axis theory, determination of equivalent circuit, power angle characteristics of salient-pole machines. Synchronous Motors: principles of operation, equivalent circuit, torque-speed curve, effect of field current changes on synchronous motor characteristics, power factor correction, synchronous capacitor or synchronous condenser, starting synchronous motors. DC machinery fundamentals, teh induced voltage and induced torque in a rotating loop, commutation and armature construction, different winding connections, lap, wave and frog leg windings. Armature reaction, commutation effects, compensation windings, losses in DC machines. The equivalent circuit of a DC motor, magnetization curve, seperately excited and shunt DC motors. Terminal characteristics of a DC shunt motor, speed control, permanent magnet DC motor. The series DC motor, terminal characteristics, speed control, Compounded DC motor: cumulatively compounded, differentially compounded, torque-speed characteristic. Starting of DC motors, Ward-Leonard system and solid-state speed controllers, DC generators: seperately excited and shunt DC generators, voltage build up in shunt generators, terminal characteristics of seperately excited and shunt DC generators, series connected DC generator, cumulatively and differentially compounded DC generators.