Modeling Uncertainties in DC-DC Converters with MATLAB® and PLECS®

Modeling is the process of formulating a mathematical description of the system. A model, no matter how detailed, is never a completely accurate representation of a real physical system. A mathematical model is always just an approximation of the true, physical reality of the system dynamics.

Uncertainty refers to the differences or errors between model and real systems and whatever methodology is used to present these errors will be called an uncertainty model. Successful robust control-system design would depend on, to a certain extent, an appropriate description of the perturbation considered.

Modeling the uncertainties in the switch mode DC-DC converters is an important step in designing robust controllers. This book studies different techniques which can be used to extract the uncertain model of DC-DC converters. Once the uncertain model is extracted, robust control techniques such as ????8 and µ synthesis can be used to design the robust controller.

The book composed of two case studies. The first one is a buck converter and the second one is a Zeta converter. MATLAB® programming is used extensively throughout the book. Some sections use PLECS® as well.

This book is intended to be guide for both academicians and practicing engineers.

Acknowledgments.- Modeling Uncertainties for a Buck Converter.- Modeling Uncertainties for a Zeta Converter.- Authors' Biographies .

Farzin Asadi received his B.Sc. degree in Electronics Engineering and his M.Sc. degree in Control Engineering and Ph.D. degree in Mechatronics Engineering. Currently, he is with the department of Mechatronics Engineering at the Kocaeli University, Kocaeli, Turkey. Farzin has published 22 international papers and 2 books and is on the editorial board of 6 scientific journals. His research interests include switching converters, control theory, robust control of power electronics converters, and robotics.Sawai Pongswatd received a B.E., a M.E., and a D.E. from King Mongkuts Institute of Technology Ladkrabang (KMITL). Currently, he is an associate professor at the KMITL, Bangkok, Thailand. Assoc. Dr. Sawai Pongswatd is a chairman of technical committee (TC69) of the Thai Industrial Standards Institute and an instructor at the Fieldbus Certified Training Program (FCTP). His research focus on power electronics, energy conversion, and industrial applications.Kei Eguchi received his B.E., M.E., and D.E. from Kumamoto University, Kumamoto, Japan, in 1994, 1996, and 1999, respectively. Currently, he is a professor at the Fukuoka Institute of Technology, Fukuoka, Japan. Dr. Kei is a president of the Intelligent Networks and Systems Society, an associate editor of IJICIC, an associate editor of ICIC Express Letters, and a senior member of IEE of Japan, APCBEES, IRED, and SAISE. He has published more than 200 international papers. His research interests include switching converters, nonlinear dynamical systems, and intelligent circuits and systems.Ngo Lam Trung received a B.E. and a M.E. in computer engineering from Hanoi University of Science and Technology, Hanoi, Vietnam. He received a Ph.D. in functional control systems from Shibaura Institute of Technology, Tokyo, Japan. His research interests include embedded system, embedded software development, and mobile computing.