Control of Quasi-Resonant Converters Using Model Predictive Control

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Ebad, Mehdi | 2008

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39337 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Tahami, Farzad
Abstract:
DC-DC switching convertors are power electronic circuits that have various applications nowadays. Quasi-resonant convertors are a kind of these convertors that are of great interest due to their simple structure and soft switching. The goal of controlling these convertors is to achieve constant output voltage while varying the input voltage and the load by choosing a proper switching frequency. Classic controllers show drawbacks in the case of high input voltage and load tolerance, and this nonlinear behavior of the systems results in some practical challenges. In this thesis, nonlinear predictive controller for quasi-resonant Buck convertors is designed. Having designed the linear predictive controller, the need to nonlinear controllers will be shown. Then, EDMC and MMPC nonlinear predictive controllers are designed and their results are compared to PID controller. The main goal of this thesis is to show the power of predictive controllers and specially EDMC controllers in comparison with other classic controlling methods
Keywords:
Nonlinear Predictive Control ; Extended Dynamic Matrix Control (EDMC) ; Multimodel Predictive Control (MMPC) ; Switching Power Supply

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