新型半橋式單級電力轉換器之研製

Development of the Novel Half-Bridge Single-Stage Power Converter

蕭賀璞(Ho-Pu Hsiao)

指導教授 ： 歐勝源

國立臺北科技大學/電資學院/電力電子產業研發碩士專班/碩士(2007年)

https://doi.org/10.6841/NTUT.2007.00191

摘要

本篇論文主要是探討如何利用元件的移位及同步切換之方式將傳統具有功因校正電路之雙級式電力轉換電路合併成為單級式電力轉換電路，並且利用此技術將半橋式(Half-Bridge)AC/DC功因校正電路與半橋式DC/DC轉換器合併，設計出新型半橋式單級電力轉換電路。
傳統雙級式架構具有高功率因數以及低輸入電流諧波等優點，但其缺點為：能量經由兩次處理，故其效率較差，而且雙級架構需要兩組控制電路，故電路面積以及開關元件數量也隨之增加。若以成本的觀點來看，雙級式電力轉換電路較不適合用於低功率方面的應用。為了改良上述之缺點，便研發出單級電力轉換電路。
本篇論文所設計之新型半橋式單級電力轉換電路，當前級的半橋式功因校正電路操作在不連續模式時，本身便具有相當良好之功因校正能力，故可以將原先之兩組控制器合併為一組控制器，且同樣具有相當良好之功因校正能力。
本論文首先討論負載變動對儲能電容之影響以及解決方法，然後說明本新型半橋式單級電力轉換電路之動作及設計，最後實際製作一百瓦之硬體電路並且以實測驗證其電路動作與理論設計符合。

關鍵字

單級式 ； 功因校正電路 ； 半橋轉換器

並列摘要

This thesis discusses how to transform two-stage power converter to single-stage power converter by component placement and synchronous switching technology. Moreover, the novel half-bridge single-stage power converter combines a half-bridge AC/DC PFC converter with a half-bridge DC/DC converter by these methods.
In general, the main advantages of two-stage power converter are high power factor, low input current harmonics and so on. However, it has some disadvantages, including (1) the poor efficiency due to twice power process; (2) the two-stage structure needing extra controller, larger area of circuit and more switch components. According to the viewpoint of cost, this two-stage PFC converter is unsuitable to be used in low-power applications. In order to improve these disadvantages, the single-stage power converter is development.
The novel half-bridge single-stage power converter proposed in this thesis has inherent gift of great power factor correction function, even the PFC inductor operates in DCM. Therefore, the original two controllers can be integrated into one single controller, and it still has great power factor correction function.
First of all, the effect of the bulk capacitor due to load variation and how to solve this problem are discussed in this thesis. The operation and design of the proposed single-stage converter are then analyzed. Finally, experimental results show good conformation with the theoretical analysis.

並列關鍵字

Single-stage ； PFC converter ； Half-bridge converter

參考文獻

[2]Q. Zhao, F.C. Lee and F. S. Tsai, “Design optimization of an off-line input harmonic current corrected flyback converter”, APEC '99, vol. 1, March 1999, pp. 91 – 97.

[3]F. S. Tsai, P. Markowski and E. Whitcomb, “Off-line flyback converter with input harmonic current correction”, INTELEC '96, Oct. 1996, pp.120 – 124.

[4]J. Qian, Q. Zhao and F.C. Lee, “Single-stage single-switch power factor correction AC/DC converters with DC bus voltage feedback for universal line applications”, Power Electronics, IEEE Trans., vol. 13, Nov. 1998, pp.1079 – 1088.

[5]M. Qiu, G. Moschopoulos, H. Pinheiro and P. Jain, “Analysis and design of a single stage power factor corrected full-bridge converter”, APEC '99, vol. 1, March 1999, pp.119 – 125.

[6]R. Redl and L. Balogh, “Design considerations for single-stage isolated power-factor-corrected power supplies with fast regulation of the output voltage”, APEC '95, vol. 1, March 1995, pp.454 – 458.