Fall 2015 -- ECEN 3170 -- Energy Conversion 1

The study of AC and DC Electrical Motors and Generators

Last Revisions on 6/24/2015

On occasion this page maybe updated or enhanced.

Did you know that

the electrical machine in a power generation plant

is fundamentally no different than

an electrical vehicle motor?

Did you know that after completing two years

of an electrical engineering curriculum,

you have gained enough fundamental knowledge

to study the specifics of both of them?

Do you like fast cars? How about fast motorcycles?

Do you like fast-green cars? How about fast-green motorcycles?

Did I just not hear a Tesla go by?

A ZERO motorcycle sounds like …. nothing …..

The “LiveWire” is so quiet, Harley gave it a unique sound.

The moral:

Could the future automotive engineer

be an electrical engineer?

This course covers pre-requisite material for

Adjustable AC Drives ECEN 4167/5737

(Electrical Drives for Electrical Vehicles)

Course Overview

 Read/study during the first week a Circuits 2 Review handout. Brief review of phasors Balanced three-phase circuits Wye and delta connections Introduction to machinery principles Rotational motion – Newton’s Law b.       Forces/torques of electric machines The magnetic field Faraday’s Law Lorentz Force Law Real and reactive power in single phase circuits, power triangle Transformers Single and three-phase Equivalent circuits Per-unit systems of measurement 6.       AC-machinery fundamentals a.       A simple rotating loop in a uniform magnetic field b.       Rotating magnetic field                                                                i.      The ingenious concept of a three-phase distributed winding energized by a three phase power supply creates a rotating magnetic field c.        Induced torque in an AC machine d.       Power flows and losses Synchronous generator from a magnetic field point of view Equivalent circuit Phasor diagram Power-flow Stability, transients Operating alone Operating on an infinite bus House diagram Synchronous motors and condensers Starting, stability Use the damper windings as introduction to induction motors Three-phase induction motors Equivalent circuit Torque-speed curves derived from a magnetic field point of view Torque-speed curves derived from the equivalent circuit point of view NEMA A, B, C, D designs Power-flow Starting in-rush DC machinery fundamentals Internal generated voltage and torque Commutation Power-flow DC motors                                                                i.      Separately excited,                                                               ii.      Series excited                                                             iii.      Shunt excited                                                             iv.      Compound excited                                                              v.      Torque curves If time permits: Single phase motors                                                                i.      Universal motors                                                               ii.      Two-phase motors                                                             iii.      Split-phase start, capacitor start, permanent-split capacitor start, capacitor-start/run We will use Matlab and Simulink Every day course details will be on D2L.   REQUIRED Course Material Text book: Stephen J. Chapman, Electric Machinery Fundamentals, 5th Edition, McGraw Hill, ISBN-13:978-0-07-352954-7. Older editions are NOT acceptable. Student version of Matlab/Simulink The 120° time shift combined with the 120° spatial shift produces a Rotating Magnetic Field The (4) equations of motion in “real world format” www.mathworks.com

Course Vitals

Instructor: Harry Hilgers

 hhhilgers@mesanetworks.net            Office: OT 352 Regular office hours: TBD

Teaching Assistant

Ø  Joshua Woodward Joshua.Woodward@Colorado.EDU

Ø  Office: OT 352

Ø  Regular office hours: Tu/Th  -- TBD

Lecture material

Ø  There is only enough class time to lecture just the core points.

ü  So it stands to reason that you read the material before coming to lecture and study it thoroughly afterwards.

ü  I will predominantly lecture with ppt charts from the text book.

Ø  I will have some hardware in the form of motors that should help with visualization

During Lectures

Ø  I encourage asking questions. The only dumb question is the one not asked.

Ø  If a question is not enough “on point” or the answer becomes too time consuming, I may suggest holding off until office hours.

In class-quizzes

Ø  One to three unannounced in-class per week

Ø  To allow for unexpected missed attendance I will drop the three lowest grades

Ø  I will contact the distance-learning students as to how these quizzes will be handled.

Homework Assignments

Ø  One HW assignment per week.

ü  You will scan your HW and drop it into the drop box on D2L prior to the due date/time.

ü  Late HW receives zero credit.

Exams

Ø  Three in-class mid-term exams

Ø  An in-class final exam

ü  I will contact the distance-learning students as to how these exams will be handled.

The final grade is computed as follows:

Ø  Each of three  midterm exams: 15%

Ø  Final exam: 25%

Ø  HW: 15% (I will drop the lowest grade)

Ø  Quizzes: 15% (I will drop the three lowest grades)

Website

Ø  This will be on D2L.

Ø  It will be used for HW assignments, announcements, calendar, exam dates, etc.

Ø  I recognize that the amount of material is very large.

Ø  Therefore by necessity some material will only be covered “on the surface”.

Ø  It is impossible for you to become an expert at it in a short semester.

Ø  So it is my goal to introduce the material to a level so that later, when you need to apply it, you will have enough background and will not be afraid to open a book and study the different aspects in detail.

Ø  The demand for Energy Conversion Engineers is on the increase; especially in the power generation industry and in the electrical vehicle industry.

Ø  I want to make sure that with this course you have enough fundamentals that you can make a good impression when going to a job interview in the Energy Conversion world.

Ø  Very often the Energy Conversion Industry as well as Electrical Consulting Industry requires Engineers that have a PE License.

ü  I urge you to look into this.

Last but for sure not least

Ø  If you qualify for accommodations because of a disability, please submit to me a letter from Disability Services in a timely manner so that your needs may be addressed.

ü  Disability Services determines accommodations based on documented disabilities. (303-492-8671, Willard 322)

Ø  Every effort will be made to reasonably and fairly deal with students who have serious religious observances that conflict with scheduled exams, assignments, etc.

ü  Please notify me well in advance, so that there is time to make adequate arrangements.

ü  The Boulder campus policy can be read at http://www.colorado.edu/policies/fac_relig.html

Ø  All students will be expected to comply with the Boulder campus honor code.

ü  This honor code can be viewed at http://www.colorado.edu/academics/honorcode/

Ø  Students and faculty each have responsibility for maintaining an appropriate learning environment.

ü  Those who fail to adhere to such behavioral standards may be subject to discipline.

ü  Professional courtesy and sensitivity are especially important with respect to individuals and topics dealing with differences of race, culture, religion, politics, sexual orientation, gender, gender variance, and nationalities.

ü  The campus policy can be read at http://www.colorado.edu/policies/classbehavior.html