以3階多相式倍壓器為主之直流-交流轉換器設計分析

Design and Analysis of 3-Stage-Multiphase-Voltage-Doubler-Based DC-AC Converter

羅梓瑤(Zih-yao Luo)

指導教授 ： 張原豪

朝陽科技大學/資訊學院/資訊工程系/碩士(2009年)

摘要

本論文提出以3階多相式倍壓器(Multi-phase Voltage Doublers,MPVD)為主並結合正弦脈波寬度調變(Sinusoidal Pulse Width Modulated,SPWM )控制之直流-交流轉換器，可以用來驅動電激發光器(electroluminescent lamp,EL)所需之交流電壓。為了降低電路系統的負擔，大多數可攜式電子裝置採用單一鋰離子電池作為輸入電壓，但是此電源不足以提供電激發光器所需之交流電，本文利用切換式電容升壓電路為主，先將低電壓升壓至所需求的直流電壓，再經由單相全橋換流器(Inverter)將直流電壓轉換成交流電壓。在本論文中，我們利用PI控制器來補償輸出電壓，以供應不同負載需求。本論文使用Orcad v10.5與Pspice來模擬電路，針對閉迴路電路進行靜態與動態模擬與量測數據，最後亦實作出電路，實驗結果為多相式倍壓器
(直流-直流轉換器)可將直流電3V升壓至23V，並經由全橋式換流器轉換成所需參考電壓之交流電，透過迴授系統使輸出具有補償與調整功能，交流總諧波失真率介於15.6%~24.5%。

關鍵字

多相式電壓倍壓器、正弦脈波寬度調變、換流器

並列摘要

The main purposed of this paper is to propose a three-stage multiphase voltage doublers (MPVD)-based DC-AC converter by sinusoidal PWM (SPWM) control, and then it can provide step-up AC output for electroluminescent lamp (EL) drive. Since the MPVD is employed here, we can obtain 8 times the voltage of source just by the least number of 3 pumping capacitors. This converter use single-phase full-bridge inverter to exchange DC voltage to AC voltage and then employ PI controller to obtain a stable voltage of output be following voltage of reference, while the power supply receive noise. In order to have output regulation, SPWM control is need have. This converter can make AC output be following the reference of voltage command. In this study, the MPVD-based DC-AC converter (inverter) is simulated via OrCAD and some cases discussed, including steady-state response and dynamic-state response for some variation. Finally, a prototype is also constructed and experimental results are presented to verify the feasibility of the proposed converter. The experimental result of total harmonic distortion is between 15.6%~24.5%.

並列關鍵字

Inverter ； multiphase voltage doublers(MPVD) ； sinusoidal PWM (SPWM)

參考文獻

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[2] J. A. Starzyk, Y. W. Jan, and F. Qiu, “A DC-DC charge pump design based on voltage doublers,” IEEE Trans. Circuits and Systems.

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[1]張原豪，結合切換式電容電路與電感式升壓調整器之白光二極體驅動晶片設計分析，國科會專題研究計劃，編號：NSC 94-2213-E-324-023，2005。