Textbook and lecture slides
- Chapter 12 slides
- Lecture 20 powerpoint slides: high frequency modeling of DCM and introduction to sampling
- Lecture 21-22 powerpoint slides: Introduction to sampling
- Lectures 24-26 powerpoint slides: More accurate modeling of CPM (1)
- Lecture 27 powerpoint slides: More accurate modeling of CPM - the HF pole and Gvg-cpm
- Lecture 28 powerpoint slides: CPM - DCM and simulation
- Lecture 29: Erickson's handwritten notes on average current mode control
Selected reference papers related to more advanced CPM modeling topics
As discussed in the lectures, the "simple" and the "more-accurate" CPM models described in the Textbook are based on the averaging approach. The resulting models give practical and reliable predictions of CPM converter dynamic responses up to a fraction of the switching frequency. In particular, assuming a ramp has been added to reduce the noise sensitivity and to eliminate period-doubling instabilities in CPM controlled converters, the textb
The textbook continuous-time averaged models do not take into account sampling or aliasing effects. These effects are increasingly visible at modulation frequencies approaching one half of the switching frequency and beyond. Numerous attempts have been made to incorporate these effects into continuous-time averaged models. This page contains some of the key contributions in this area. Reading these papers is completely optional - these materials will not be addressed in ECEN5807 homework or exam problems.
- R.B.Ridley, "A new, continuous-time model for current-mode control," IEEE Transactions on Power Electronics, Volume 6, Issue 2, April 1991, pp. 271-280.
- F.D.Tan, R.D.Middlebrook, "A unified model for current-programmed converters," IEEE Transactions on Power Electronics, Volume 10, Issue 4, July 1995, pp. 397-408.
- D.J. Perreault, G.C.Verghese, "Time-varying effects and averaging issues in models of current-mode control," IEEE Transactions on Power Electronics, Volume 12, Issue 3, May 1997, pp. 453-461.
- F.J.Ascondo, Ch.Branas, R.Casanueva, D.Maksimovic, "Approaches to modeling converters with current programmed control," IEEE PEEW 2005. (Educational Workshop at IEEE PESC 2005); this paper summarizes similarities and differences among various models.