本研究探討應用模糊控制於可程式之非反向同步升降壓直流電 源轉換器之設計。整體架構分為非反向同步升降壓直流電源轉 換器與微控制器兩部分。非反向同步升降壓直流電源轉換器負 責電源升降壓穩壓動作,微控制器透過光敏電阻控制轉換器之 輸出電壓。此系統中應用了光敏電阻,由於光敏電阻之物理模 型極為複雜,因此對光敏電阻之物理模型進行深入之探討,並 設計模糊控制器解決光敏電阻物理模型複雜之問題。最後利用 本設計成功的執行鋰電池充電,驗證本設計的實用性。 關鍵字: 同步升降壓直流電源轉換器、光敏電阻、模糊控制。
This thesis discusses the fuzzy logic control for a programmable non-inverting synchronous buck-boost DC/DC power converter design. The system contains two major subsystems, namely, a non-inverting synchronous buck-boost power converter and a microcontroller based control unit. The system uses a light dependent resistor (LDR) to bridge the control of the power converter. Due to complexities of the dynamic model of the LDR, a comprehensive study of the dynamical behavior of the LDR is conducted. A fuzzy logic controller is then developed to achieve a satisfactory design. The proposed design is successfully verified through a Li-ion battery charging experiment.