ECEN 5807 Modeling and Control of Power Electronics Systems

Spring 2007 Calendar

Chapter, section and problem numbers are based on the textbook Fundamentals of Power Electronics, second edition. The course policies, including instructions for off-campus students are posted on the course vitals page. Homework solutions are posted in password-protected folders of the course web site. The passwords will be sent by email, upon receipt of your work. If you have not received the password for the work you submitted, please contact the instructor by email.

The schedule is subject to change - check this page regularly.

Updated 5/09/07

Monday	Wednesday	Friday
January 15 No classes, Martin Luther King, Jr. Day	1. January 17 Introduction Reading assignment: Section 7.4. Start averaged switch modeling and simulation (Section 7.4 and Appendix B)	2. January 19 Averaged switch modeling and simulation (Section 7.4 and Appendix B)
3. January 22 Averaged switch modeling and simulation (Section 7.4 and Appendix B) Homework 1 assigned: problems 7.15 (30 pts), 7.16 (40 pts) and 7.17 (30 pts). Reading/simulation assignment: read Section B.1; run PSpice to repeat the simulation example of section B.1.3. You can use the model and the circuit netlist from the textbook. For this assignment, you do not need to turn in anything, but let the instructor know if you had troubles or questions related to running the simulation. Homework 1 solutions Problem 7.15 Problem 7.16 Problem 7.17	4. January 24 Averaged switch modeling and simulation (Section 7.4 and Appendix B) Slides for today's lecture: Application in simulation Alternative switch network definitions and an example of switching loss modeling Additional references on circuit averaging and averaged-switch modeling: G.W.Wester, R.D.Middlebrook, "Low-frequency characterization of switched dc-dc converters." IEEE Trans. on Aerospace and Electronic Systems, Vol. 9, May 1973, Page(s):376 - 385. V.Vorperian, "Simplified analysis of PWM converters using model of PWM switch. Continuous conduction mode", IEEE Trans. on Aerospace and Electronic Systems, Vol. 26, Issue 3, May 1990 Page(s):490 - 496	5. January 26 Introduction to Input Filter Design (Chapter 10)
6. January 29 Extra-Element Theorem (Appendix C) Homework 1 due Homework 2 assigned Homework 2 solutions Additional EET reference: R.D.Middlebrook, "Null double injection and the extra element theorem," IEEE Trans. on Education, Volume 32, Issue 3, Aug. 1989, Page(s):167 - 180.	7. January 31 Examples of Extra-Element Theorem applications	8. February 2 Examples of Extra-Element Theorem applications SEPIC example
9. February 5 Examples of Extra-Element Theorem applications SEPIC example continued Homework 2 due Homework 3 assigned Homework 3 solutions	10. February 7 Input Filter Design (Chapter 10)	11. February 9 Input Filter Design (Chapter 10)
12. February 12 Input Filter Design (Chapter 10) N-Extra-Element Theorem Homework 3 due Homework 4 assigned Homework 4 solutions	13. February 14 N-Extra-Element Theorem   Here is the N-EET paper (including a proof) by Middlebrook at al. Reading this paper is completely optional - no homework or exam questions will assume knowledge of the materials presented in this paper.	14. February 16 N-Extra-Element Theorem examples Extensions of N-EET when the dc asymptote is zero
15. February 19 Middlebrook's Feedback theorem supplementary materials Middlebrook's Feedback theorem derivation (slides for taking notes) Homework 4 due Homework 5 assigned Homework 5 solutions	16. February 21 Modeling the discontinuous conduction mode (Chapter 11 and Appendix B). Chapter 11 slides.	17. February 23 Modeling the discontinuous conduction mode (Chapter 11 and Appendix B). Chapter 11 slides.
18. February 26 Modeling the discontinuous conduction mode (Chapter 11 and Appendix B). Chapter 11 slides.Combined DCM/CCM model (this is a previously taped lecture) Homework 5 due Homework 6 assigned Semilog paper Homework 6 solutions	19. February 28 Finish modeling the discontinuous conduction mode (Chapter 11 and Appendix B): high-frequency effects (this is a prevously taped lecture) More about dynamic modeling of DCM converters and high-frequency effects in particular can be found in: Maksimovic/Cuk 1991 (Unified DCM model)  Sun et al. 2001 (Consistent averaged DCM model)	20. March 2 Introduction to sampled-data modeling
21. March 5 Introduction to sampled-data modeling Homework 6 due Midterm Exam handed out (for on-campus students)	22. March 7 Introduction to sampled-data modeling Start Chapter 12, Current-programmed control: for taking notes in class, use these CPM lecture slides (1) Note: CPM lectures will follow a slightly different approach compared to the textbook Chapter 12. For reference, these are the original Chapter 12 slides.	23. March 9 Current-programmed control: simple first-order model Current-programmed control, CPM lecture slides (2) MATLAB file used to plot CPM inductor-current frequency responses can be found in the updated Introduction to sampled-data modeling
24. March 12 Chapter 12, Current-programmed control: more accurate models Homework 7 assigned Semilog paper Homework 7 solutions Midterm Exam due (for on-campus students) Midterm Exam solutions	25. March 14 Current-programmed control, CPM lecture slides (3)	26. March 16 Current-programmed control
27. March 19 Current-programmed control CPM lecture slides (4) Homework 7 due	28. March 21 Current-programmed control	29. March 23 Finish CPM control: CPM lecture slides (5) Homework 8 assigned Homework 8 solutions Reference papers about more advanced CPM modeling approaches
March 26 Spring break, no classes	March 28 Spring break, no classes	March 30 Spring break, no classes
30. April 2  Input filter design for CPM-controlled converters; reference paper: Y.Jang, R.W.Erickson, "Physical origins of input filter oscillations in current programmed converters," IEEE Transactions on Power Electronics, Vol.7, No.5, Oct.1992. Slides for lecture notes   Introduction to Average current-mode control; reference papers: L.Dixon, "Average current mode control of switching power supplies," 1990. J.Sun, R.M.Bass, "Modeling and practical design issues for average current control," IEEE APEC 1999.	31. April 4 Modeling of converters with Average current-mode control.	32. April 6   Introduction to digital control Homework 9 assigned  Homework 9 solutions Homework 8 due
33. April 9 Introduction to digital control	34. April 11 Introduction to digital control	35. April 13 Introduction to digital control Homework 10 assigned Homework 10 solutions Homework 9 due
36. April 16 Introduction to AC-DC rectifiers: Power and Harmonics in Nonsinusoidal Systems (Chapter 16 slides) Line-Commutated Rectifiers (Chapter 17 slides): Section 17.1	37. April 18 Finish Introduction to AC-DC rectifiers (Chapters 16 and 17)	38. April 20 Pulse-Width Modulated Rectifiers (Chapter 18 slides) Section 18.1 Homework 10 due
39. April 23 Sections 18.2 and 18.3 Section 18.3.1, average current control Homework 11 assigned Homework 11 solutions	40. April 25 Section 18.3.1, average current control, and Section 18.3.2, CPM, Section 18.3.3, critical conduction mode and hysteretic control	41. April 27 Section 18.3.4 NLC control Section 18.4 Single-phase converter systems, energy storage and voltage loop
42. April 30 Section 18.4.2 Modeling the outer low-bandwidth control system Section 18.5 RMS values of rectifier waveforms	43. May 2 Section 18.5.2 Comparison of single-phase rectifier topologies Section 18.6 Modeling losses and efficiency	44. May 4 last day of classes Final exam handed out Homework 11 due
		On campus students: final exam is due by 9am on Thursday, May 10. Off campus students: request the final exam by email upon completion of HW11. All off-campus work must be received by Friday, May 18.