以切換電感與切換電容為主體架構之高增益升壓直流轉換器的設計與實作

Design and Implementation of High-Gain Switched-Inductor-Switched-Capacitor-Based Step-Up DC-DC Converter

陳昱彰(Yu-chang Chen)

指導教授 ： 張原豪

朝陽科技大學/資訊學院/資訊工程系/碩士(2013年)

摘要

本文旨在提出一閉迴路設計之以切換式電感與切換式電容為主體架構之高增益升壓直流轉換器的設計與實作(Design and Implementation of High-Gain Switched-Inductor-Switched-Capacitor-Based Step-Up DC-DC Converter)，並結合相位產生器與脈波寬度調變技術(Pulse-Width-Modulation, PWM)為基礎的增益補償器，以進行控制整個電路升壓轉換率與電壓調節。在本文提出的電力轉換電路中包含了兩個階段來討論：(i) 前級電路：二階串並聯切換電容式電路， (ii) 主要級電路：二階並聯切換電感式諧振升壓電路。前級的SC電路中，可以提供3倍的電壓增益供應到後級電路。在後級的SI電路的升壓增益可以達到 2/(1-D)，而D代表的是SI電路中MOSFET的Duty-Cycle。理論上，當SISCC的Duty-Cycle大約在0.67時，可以達到16倍升壓。在此，本論文採用PWM技術，透過閉迴路補償實際電壓值與期望電壓值之間的誤差以增強輸出的調整能力，也針對了負載變動與電源變動下加強輸出的強健性。此閉迴路SISCC的設計使用了OrCAD Pspice 進行電路模擬並了幾個例子，如穩態輸出電壓轉換、輸出電壓對電源變動或電源雜訊抑制能力以及負載變動時轉換器的調節能力。最後實作電路，以證實本文提出轉換器的可行性。

關鍵字

串並聯 ； 升壓轉換器 ； 切換式電容(SC) ； 切換式電感(SI) ； 脈波寬度調變(PWM) ； 諧振式升壓 ； 高增益

並列摘要

A closed-loop scheme of High-Gain Switched-Inductor-Switched- Capacitor-Based Step-Up DC-DC Converter is proposed by using a phase generator and pulse-width-modulation-based(PWM-based) gain compen- sator for step-up DC-DC conversion and regulation. In the power part of SISCC there are two cascaded stages including: (i) pre-stage: a two-stage serial-parallel switched-capacitor (SC) circuit, and (ii) core-stage: two switched-inductor (SI) resonant boosters in parallel. In the pre-stage SC circuit, it provides at most 3 times voltage of source Vs for supplying the rear boosters. In the core-stage SI boosters, the step-up gain can reach to 2/(1-D), where D means the duty cycle of the MOSFET in SI. Theoretical this SISCC can boost the output voltage Vo to 16 times when D= 0.67. Further, the PWM technique is adopted not only to enhance the output regulation for the compensation of the dynamic error between the practical and desired outputs, but also to reinforce output robustness against source or loading variation. Finally, the closed-loop SISCC is designed by OrCAD SPICE and simulated for some cases: steady-state and dynamic response (source/loading variation). All results are illustrated to show the efficacy of the proposed scheme.

並列關鍵字

Serial-Parallel ； High-Gain ； Resonant Boost ； Switched-Inductor ； Switched-Capacitor ； Pulse-Width-Modulation ； Step-Up Converter

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