quinta-feira, 8 de março de 2012
APEC 2012 DR. FRED LEE PLENARY
VIDEO LINK :https://ieeetv.ieee.org/player/html/viewer#apec-2012-dr-fred-lee-plenary
Dr. Fred Lee, University Distinguished Professor, Virginia Tech gives an in-depth talk about Current Mode Control and Modeling.
Time: 1:30 pm – 2:00 pm
Speaker: Dr. Fred Lee
University Distinguished Professor
"Current Mode Control and Modeling- 3 Decades of Progress"
The paper starts with a review of the history of development of current mode control and various modeling attempts. The topic of modeling for current mode control, although seemingly settled, still left many unsolved issues. Arthur Brown proposed the discrete time domain sample-data modeling, in the 80’s, which accurately predicted the sub-harmonic oscillation associated with the peak current model control. Subsequently, Brown’s discrete time domain model was reformulated and simplified by Ray Ridley in frequency domain to offer it as a design-oriented modeling and analysis tool. The discrete time sample-data modeling was essentially based on constant frequency operation. It has limited applications to other forms of current-mode control, such as variable frequency control and average current-mode control.