Modeling and Control of Power Electronics Systems

ECEN 5807 Spring 2011

Announcements

  • (5/01) Final exam clarifications:
    • Problem 1, AC input 90-140 Vrms
    • Problem 1, part (c), the load is power sink as shown on page 3
    • Problem 2, part (d), "..use the Tan model..." should be "...use the CPM model (4)..."
  • (4/26) A corected HW13 has been posted.
  • (4/25) For on-campus students, 5-day take-home final exam will be handed out in class on Friday, April 29. The exam is due by 2pm on Wednesday, May 4 in the instructor's office. Off campus students can request the final exam by email to the instructor any time after 3pm on Friday, April 29. The exam is due 5 days after the receipt of the exam. All off-campus work must be received by 2pm (Mountain time) on Wednesday, May 11. Work received after this deadline will receive no credit.
  • (4/22) Homework 13 is due in class (for on-campus students) on Friday, April 29 (lecture 44). Off-campus students have a one-week grace period, which ends Friday, May 6, 5pm Mountain time.
  • (4/20) Handout slides and a reference paper about PV inverters have been added on the schedule page, lecture 40
  • (04/15) Homework 12 is due in class (for on-campus students) on Friday, April 22 (lecture 41). Off-campus students have a one-week grace period, which ends Friday, April 29, 5pm Mountain time.
  • (04/11) In HW11, in the buck-boost converter, the output voltage reference polarity ((-) top, (+) bottom) is such that the DC output voltage V is positive.
  • (04/08) Homework 11 is due in class (for on-campus students) on Friday, April 15 (lecture 38). Off-campus students have a one-week grace period, which ends Friday, April 22, 5pm Mountain time.
  • (04/06) A corrected verison of Problem 1 in HW10 has been posted.
  • (04/01) Homework 10 is due in class (for on-campus students) on Friday, April 8 (lecture 35). Off-campus students have a one-week grace period, which ends Friday, April 15, 5pm Mountain time.
  • (03/30) A corrected verison of Problem 1 in HW9 has been uploaded. The statement "no artificial ramp is employed" has been deleted.
  • (03/19) Homework 9 is due in class (for on-campus students) on Friday, April 1 (lecture 32). Off-campus students have a one-week grace period, which ends Friday, April 8, 5pm Mountain time.
  • (03/19) Midterm exam solutions have been posted on the Assignments page (bottom section). Username/password have been sent by email.
  • (03/19) There will be no office hours during the week of March 21-25.
  • (03/11) Homework 8 is due in class (for on-campus students) on Friday, March 18 (lecture 29). Off-campus students have a one-week grace period, which ends Friday, March 25, 5pm Mountain time.
  • (03/07) In Midterm exam problem 2(d), the transfer function coefficients should be expressed in terms of the converter parameters (Lf, Cf, M, Re, C)
  • (03/07) Additional materials and references have been posted related to introduction to sampled-data modeling and more-accurate current-mode control models
  • (02/26) switch.lib has been updated to address problems encountered in flyback simulations in problem 1 of HW7. See comments in CCM-DCM1 and CCM-DCM2 models.
  • (02/25) For on-campus students, midterm exam will be handed out in class on Friday, March 4 and will be due in class on Friday, March 11. Off-campus students can request the midterm exam by email to the instructor on or after Friday, March 4. The exam will be due 7 days after the receipt of the exam by email, but no later than Friday, March 18, 5pm Mountain time. Education Officer is not required.
  • (02/25) Homework 7 is due in class (for on-campus students) on Friday, March 4 (lecture 23). Off-campus students have a one-week grace period, which ends Friday, March 11, 5pm Mountain time.
  • (02/19) Simulation results and files have been added to HW4 solutions.
  • (02/18) Homework 6 is due in class (for on-campus students) on Friday, February 25 (lecture 20). Off-campus students have a one-week grace period, which ends Friday, March 4, 5pm Mountain time.
  • (02/11) Homework 5 is due in class (for on-campus students) on Friday, February 18 (lecture 17). Off-campus students have a one-week grace period, which ends Friday, Feb 25, 5pm Mountain time.
  • (02/09) For Spice simulations of the flyback converter in HW4 you can use "CCM3" and "transformer" models from switch.lib. The "transformer" model includes magnetizing inductance and turns ratio, but no leakage inductances or losses. Here is an LTspice transformer symbol. Other LTspice symbols for switch.lib models can be found on the textbook Spice page.
  • (02/04) Homework 4 is due in class (for on-campus students) on Friday, February 11 (lecture 14). Off-campus students have a one-week grace period, which ends Friday, Feb 18, 5pm Mountain time..
  • (02/01) A note to off-campus students: please include your email address on the front page of the work you submit to make it easier for CAETE to scan and email graded work back to you.
  • (01/27) Homework 3 is due in class (for on-campus students) on Friday, February 4 (lecture 11). Off-campus students have a one-week grace period.
  • (01/27) For Homework 1, the grace period for off-campus students expires Friday January 28 at 5pm Mountain time.
  • (01/21) Homework 2 is due in class (for on-campus) students on Friday, January 28 (lecture 8). Off-campus students have a one-week grace period.
  • (01/16) Fig.2 in Problem 2 of HW1 has been corrected.
  • (01/14) Homework 1 is due in class (for on-campus) students on Friday, January 21 (lecture 5). You can upload your work electronically via CULearn. For other options, see the Vitals and info page.
  • (01/12) We are switching to a different recording system, so the link to on-line lectures has been updated. Starting with lecture 2, the recorded lectures will be at the new location which has been emailed to your colorado.edu email address.
  • (01/10) It appears that there was a problem with Tegrity recording of lecture 1 - slides may not be visible. I have asked CAETE people to look into this. Here are the slides covered in Lecture 1.
  • (01/10) Lecture 1 Introduction slides have been posted.After the course introducution we will start with an introduction to modeling and simulations of switched-mode converters using MATLAB/Simulink
  • (01/09) A MATLAB/Simulink page has been added to the course materials
  • (01/09) The class starts Monday, January 10 in ECCS 1B12 (CAETE studio)
  • (01/09) A blog has been setup to encourage and enable both on-campus and off-campus students to post questions, comments, ideas, discussions or pointers to on-line resources related to course materials and homework assignments. Student registered for the course will receive an email invitation to join the blog.
  • (12/31) Software requirements: a Spice simulator and MATLAB/Simulink. LTspice is a recommended free Spice simulator. Other Spice simulators are acceptable, but the instructor may not be able to provide any tool-specific support. MATLAB/Simulink are available to on-campus students in all computer labs, including the Power Lab and Circuits Lab computers. Off-campus students are entitled to purchase student versions of the required MATLAB/Simulink components: MATLAB & Simulink Student Version (currently version R2010a): $99, and Simulink Control Design (an add-on package): $29.

Advanced modeling and control topics in power electronics, and power factor corrected supplies. Averaged switch modeling of converters, computer simulation, ac modeling of the discontinuous conduction mode, the current programmed mode, null double injection techniques in linear circuits, input filter design, harmonics in power systems, and low-harmonic rectifiers.

Prerequisite: ECEN 5797. ECEN 5807 is offered in alternate springs, including Spring 2011. Instructor: Prof. Dragan Maksimovic. It is one of the three courses required for the Professional Certificate in Power Electronics.

The course is offered both to regular on-campus students and also to off-campus students via CAETE. Students registered through CAETE can receive lectures via videotape or DVD, web-based streaming video, or live TV. Further details of the course policies, including procedures for off-campus students, are listed on the Vitals page.