ECE 464 Power Electronics
Fall 2009 Web Page
- Professor: Philip Krein
Email: krein AT
illinois.edu
Office Hours: Wednesdays 1:30-3 pm, 50 Everitt, or by appointment, 347 Everitt Lab
- Please note that help is also available in the lab (room
50) on Tuesdays 9:30-10:30am, 4-5pm, and on Wednesdays 3-4pm from the ECE
469 TAs.
Syllabus
Announcements --
8/24/09 Welcome to ECE 464!
The presentation used in the first session can be found here.
9/2/09
Six necessary rules for design and operation of power converters:
1. Conservation of energy.
2. The source conversion concept.
3. Kirchhoff's Voltage Law: do not attempt to
interconnect unlike voltages.
4. Kirchhoff's Current Law: provide a path for all
currents at all times.
5. The average voltage across an inductor is zero.
6. The average current through a capacitor is zero.
9/14/09 Test #1
will be held in class on Wednesday, September 30. The final exam schedule
calls out Thursday December 17 at 8:00am.
9/25/09 There will
be an optional review session on Monday, September 28 in room 50.
11/1/09 Test #2
will be held in class on Wednesday, November 11. It covers material
through Chap. 10.
11/4/09 Office
hours THIS WEEK ONLY are noon to 1pm because of a building meeting conflict.
I will also be available during some portion of the Friday open lab period.
You are welcome to send homework questions by e-mail.
11/9/09 As a
service to those who have been ill, with flu and otherwise, I have provided
access to a set of session notes that was prepared several years ago for a video
offering of the course. Please note that these on strictly on an "as-is"
basis, and for personal use by enrolled students.
Links here. No office
hours this week, given the exam Wednesday morning.
11/18/09 Prof. Krein will not be available Wednesday or Thursday,
but there will be hours in the lab staffed by the ECE 469 TAs per the regular
schedule.
12/10/09 You are
welcome to attend any or all of the ECE 469 project presentations, room 50,
12-3pm.
The final exam will be Thursday December 17, 8am-11am. Meet in room 165
Everitt.
Exams and Study Guides
Sample Exam with Solution Fall 2008,
Sample Exam 1
Homework and Readings, Solutions, and Reviews
- Homework Archive
- Homework #8 due Friday, October 31, 2009
Solutions
1. Problem 6 in Chap. 6.
2. An ac-ac converter has been constructed to take variable
three-phase ac from a wind generator and deliver it to a three-phase 60 Hz
ac grid. The generator output has been filtered to looks more or less
like an ac current source, but has a voltage that increases linearly with
wind speed. Its frequency ranges from 40 Hz at minimum wind speed to
300 Hz at maximum. The grid-side voltage is 4160 V line-to-line RMS.
The wind-side voltage is 5400 V line-to-line RMS at the maximum speed.
a. Draw a circuit that represents this function.
b. What switching frequencies do you recommend for the
expected operating range?
c. For the maximum wind speed, plot (and I DO NOT mean
sketch on looseleaf paper) the input voltage for any one of the line-to-line
connections. What is the amplitude of the wanted component of this
voltage?
3. Problem 4 in Chap. 7.
4. Problem 16 in Chap. 7.
5. Problem 6 in Chap. 9.
- Please read sections in Chap 7 except skip 7.4 and
7.5. Please read sections 9.1 and 9.2.
- Homework #9 due Friday, November 6, 2009
Solutions
1. Problem
9 in Chap. 9.
2. Problem 16 in Chap. 9.
3. Problem 21 in Chap. 9.
4. Problem 10 in Chap. 10.
5. Problem 3 in Chap. 10. Hint: the switching time is the
duration of the interval as a device changes from on to off or vice versa.
- Please read sections 9.3.1 and 9.4, then all of Chapter 10.
- Homework #10 due Friday, November 20, 2009
Solutions
1. Problem 13 in Chap. 10.
2. Problem 2 in Chap. 11.
3. Problem 10 in Chap. 11.
4. Problem 11 in Chap. 11.
- Homework #11 due Friday, December 4, 2009
Solutions
1. Problem 20 in Chap. 11.
2. Problem 24 in Chap. 11
3. Problem 2 in Chap. 12
4. Problem 4 in Chap. 12
5. Problem 12 in Chap. 12.
- Please read all of Chap. 12
- Reading in Chap. 13: sections 1-4, 6, 7, 10
- The examples in Section 13.13 might be of value, along with practice
problems such as 13.4 and 13.8a,b
Solutions
- Sample final exam
Other Material
Grainger Award
Last updated on
12/09/2009