開關式直流-直流轉換器之新型順滑模態控制

Abstract

本論文探討一種新型順滑模態控制器應用在開關式直流--直流電源轉換 器( 降壓型, 昇壓型和反轉型 ). 藉由根值給定法, 在我們限制的三個條 件下, 選擇適當的特徵值, 以獲得一個合適的順滑方程式. 進一步的, 利 用順滑模態控制理論與禮亞普諾穩定理論, 導出三條不等式以規範系統穩 定與到達的範圍. 我們系統設計目的正是將系統導引至原點, 而原點也將 被證實是一個漸進穩定點. 同時, 我們也探討更簡化地選取順滑方程式. 利用可變結構理論將系統軌跡從原點導進規劃的穩定與到達範圍. 最後, 將此新的設計方法應用在開關式直流--直流電源轉換中, 以印證其可行 性. This thesis applies the sliding-mode theory to the design of DC- to-DCswitched power converters, which are Buck (with parasitic resistance), Boost and Buck-Boost converters and modeled as bilinear systems. Anew design scheme ofconventional pole- assignment method. Further based on the sliding-modetheory, a reaching-and-sliding region and a stable-sliding region are derived and most importantly the equilibrium point is bounded in theirintersection and shown to be asymptotically stable. In addition,variable structure method in phase-plane is suggested to steer the system into this intersection from the initial condition. One simplesttype of sliding function is also discussed, which only requires the measurement of inductor current. Finally, simulation results demonstratethe success of the proposed sliding-mode technique.