Lecture Set 0

ECE32100/ECE51012Electromechanical Motion Devices/

Electromechanics

S.D. Sudhoff

Spring 2018

Courses Meeting Together

• Courses

�ECE32100 Live {321L}

�ECE32100 Video {321V}

�ECE51012 On Campus {510C}

�ECE51012 Off Campus – Pro Ed {510P}

• Differences

�321V and 510C will take exams elsewhere

�510P will take exams at designated sites

�510C/510P will have modified homework and exams 2

What This Course is About

• Fundamental concepts related to the analysis of electromechanical devices

• Fundamental and quantitative understanding of the operating principals of electromechanical devices

• Some design considerations

• Concentration on the physics, the operating principals, and the modeling

3

What This Course is Not About

• Not about how to pick electromechanical devices from a catalog

• Not about a technology survey

• Not about how to use an equation

4

5

Background

• BSEE, Purdue, 1988

• MSEE, Purdue, 1989

• PhD, Purdue, 1991

• P.C. Krause and Associates, 1991-1993

• University of Missouri – Rolla, 1993-1997

• Purdue, 1997 -

6

Background

• Interests (Technical)

�Electromechanical Devices

�Power Magnetics

�Applied Automatic Control

�Evolutionary Computing / Optimization Techniques

�Automated Design

• Interests (Non-Technical)

�Distance Running

�Amateur Astronomy (WVAS)

�Bad Science Fiction

7

Course Objectives

1. Ability to Analyze/Design Electromagnetic Devices

2. Understand Principles of Electromagnetic Energy Conversion

3. Understand Time-Varying Transformations

4. Analysis/Understanding of DC, Brushless DC, Induction Machines

5. Analysis of Power Converters for DC Machines

8

Topics

• Magnetically Coupled Circuits (7)• Energy Conversion (6)• VR Stepper Motors (3)• DC Machines (4)• DC/DC Power Converters (3)• Rotating MMF (5)• Reference Frame Theory (2)• Brushless DC Machines (5)• Transformers (1)• Induction Machines (6)• Exams (3)

9

Course Text

• P.C. Krause, O. Wasynczuk, S.D. Pekarek, “Electromechanical Motion Devices, 2nd Edition”

• S.D. Sudhoff, “Lecture Handouts for ECE321”, available through the course web site

10

Before You Take This Course

• Prerequisites

�EE202 and Phys 261

• Also, You Should Be Good At

�Calculus

�Basic Linear Algebra

11

Contact Information

• Instructor: Professor S.D. Sudhoff

�Office: Wang 2057

�E-mail: sudhoff@purdue.edu

�Phone: 765-494-3246

�Office Hours: See course web site

• Course Web Site

�http://cobweb.ecn.purdue.edu/~sudhoff/

12

Contact Information

• Area Secretary: Chris Ramsey

�Office: Wang 2080

�E-mail: cramsey@purdue.edu

�Phone: 765-494-6442

• Teaching Assistant: Stephanie Johnson

�E-mail: john1254@purdue.edu

�Office hours: See course web site

13

Homework

• Put your name and course {321L, 321V, 510C, 510P} in upper right hand corner of each homework.

• Homework will be assigned every Wednesday (more or less) and due the following Wednesday (more or less)

14

Homework

• Homework submission:

�ECE321L Submit in class on paper. Due at beginning of period on due date.

�ECE321V, ECE510C, ECE510P. Submit via single PDF file to Chris Ramsey. Due at 10 pm your local time on due date.

�Filename should be ECE321V_HWX_Jane_Doe.pdfECE510P_HWX_John_Doe.pdf (X=homework number)

Homework

• The percent of homework you correctly answer over the semester will be calculated.

• Late homework will not be accepted• You may freely discuss your homework with other

students; however, individual work is expected.• Lowest 3 homework scores will be dropped.

15

16

Mini-Project

• A small design project will be assigned during the course of the semester.

17

Exams

• Exam 1: Friday, February 9, 2018 (in-class)• Exam 2: Monday, March 5, 2018 (in-class)• Exam 3: Friday, April 6, 2018 (in-class)• Exam 4: Final Exam Period (1st Hour)

�Non-cumulative portion over last material• Exam 5: Final Exam Period (2nd Hour)

�Cumulative portion over entire course• Average Exam Score

�Your average exam score will be taken to be the average of Exam 1 – Exam5, with Exam 5 replacing the lowest of the Exam 1 – Exam 4 scores (if it is higher than the lowest).

Exam Policies – Calculator (321 and 595)

• Effective beginning in January 2015, the onlycalculator permitted for exams in ECE undergraduatecourses (those at the 10000 – 40000 level) will be theTexas Instruments TI-30X IIS scientific calculator.This is an inexpensive calculator with a 2-line display,a fraction feature, one or two-variable statistics, simpleconversions, and basic scientific & trigonometricfunctions. Students are encouraged to familiarizethemselves with the use of this calculator well inadvance of any exam.

• This policy addresses the potential for academicdishonesty given the features of many advancedcalculators (programmability, large memory capacity,wireless communication, etc.), thus ensuring theintegrity of the exam. In addition, a commoncalculator provides a fair and uniform examexperience for all students

18

19

Exam Policies

• No computers, cell-phones, PDAs, slide rules, abacus, rulers, etc., except as noted. TI-30X IIS scientific calculators are allowed. Bring one.

• If you forget a calculator, I will loan you one subject to my supply. It will cost you 10 pts. I will distribute these in the order people request them until I run out. If I run out, you will have to do the best you can w/o a calculator. Calculators may not be shared.

• If you have a similar calculator to the one specified, but not the one specified, it will cost you 10 pts.

• If you have a calculator substantially different from the one specified I won't allow you to use it, but will loan you one if I have one (subject to the 10 pt penalty). If I run out, you'll have to do the best you can without.

Exam Policies

• One 8.5 by 11 inch piece of paper (both sides) allowed for each exam. Two sheets are allowed for the final.

• If I can see any course materials other than the crib sheet, it is considered cheating (I do not even want to see a closed book – put all books in a closed opaque backpack)

• Do not look past your own desk. Hats with front brims are not allowed.

• Graded exams are released if a regrade is needed.

20

Exam Policies

• Makeup exams will only be rarely allowed, as your lowest exam score, if it is lower than your Exam 5 score, will be replaced by your Exam 5 score. In the event of a makeup exam I will ask questions orally and you will write answers on a piece of paper.

• Bring your student ID to exams.• Write your student ID on the exam. Do not write your name

on the exam.• Exams will be curved on a per test basis.• Regrade form should be turned in within 2 weeks of date the

exam is returned

21

Exam Policies (Continued)

• 321L: Exams will be in class

• 321V and 510C: Exams will be at the same time as the 321L exams, but in a different room

• 510P: Exams will be on the same day, but at designated sites and times

23

Cheating

• At minimum, cheating will result in a zero on the assignment in question.

• All instances of cheating, even suspected cheating, will be reported to the ECE Assistant Head for Education and the Assistant Dean of Students

• Exams may by photographed/videotaped

24

Satisfying ABET {321L, 321V, 510C}

• Must satisfy if in 321L, 321V, 510C* whether graduate or undergraduate

• This course has five objectives. • You must demonstrate a level of achievement in each of

these to pass the course. • This may be done by satisfying the ABET exam. • The ABET Exam is a take-home exam is roughly 4 weeks

prior to end of semester.

*If at least one undergraduate registers

ABET Exam

• It is about the length of a one-hour exam• It may be viewed as practice for the cumulative final • It will have an ABET question over each objective • This exam is to be worked independently • Every answer must be completely correct to be accepted• We will grade as turned in; and let you know which

questions are incorrect• If you get a question wrong, you may rework and

resubmit until you get it correct or until the beginning of the last class period.

25

ABET Exam

• Late ABET exams will cause a reduction of your course average by 5 points / business day

• After 5 business days, the exam will no longer be accepted and you will fail the ABET exam

26

Nominal Course Grade

• Average exam score based on the average of the Exam 1 – Exam 5 scores, with the lowest of the Exam 1 – Exam 4 scores being replaced by the Exam 5 score, if that score is higher.

• Aggregate Score�80 % Average Exam Score

� 5 % Mini Project

�15 % Homework

• The +/- system for letter grades will be used27

28

Final Grade and ABET

• 321L,321V,510C*�If you don’t pass the ABET requirement, you will not be

eligible for a passing grade. �If you pass ABET requirements, your grade will be your

nominal grade except for adjustments for late ABET exams if applicable.

• 510P�You don’t need to worry about ABET. You can work the

ABET exam for practice or fun if you like.�Your grade will be your nominal grade.

*If no undergraduate register, this will not be necessary

Letter Grade Scale

• After rounding your cumulative score to an integer

• A-: 90-92, A: 93-96, A+: >= 97

• B-: 80-82, B: 83-86, B+: 87-89

• C-: 70-72, C: 73-76, C+: 77-79

• D-: 60-62, D: 64-66, D+: 67-69

• F: <=59

29

Disclaimer on Policies

• In the event of a worldwide pandemic, asteroid impact, global flood, Sharknado, zombies, killer shrews, Triffids, or invasion of space-alien homework-eating cyborg super beagles, or other such event, class policies may be adjusted midcourse. Information will be posted on course web site in such a case.

30

Personal Tragedies

• There is much that can go wrong in life, such as death ofa family member. While you are always welcome todiscuss such events with me, if you don’t want to pleasenote that you may miss an examand 3 homeworks withno questions asked. You should save your droppedhomework and exams just in case such an event occurs.If something happens which requires measures beyondthis, or which causes conflict with the final exam(whichcounts as two exams), please contact me.

31