單切換開關零電流切換串並聯共振式轉換器

Single-Switch Zero-Current-Switching Topology with Series-Parallel Resonant Converter

郭祐睿(You-Ruei Guo)

指導教授 ： 吳明芳

共同指導教授 ： 莊英俊

崑山科技大學/工程學院/電機工程研究所/碩士(2011年)

摘要

共振式轉換器目前已經被大量運用各類高頻切換式轉換器並以取代傳統硬切換式轉換器，原因在於共振式轉換器具有電路體積小，重量輕，低切換損失以及高效率等優點，且會因為共振槽內電容和電感不同的組合方式而產生不同的共振效果與型式，而且共振式轉換當開關在切換時可以達到零電流切換(Zero Current Switching，ZCS)或零電壓切換(Zero Voltage Switching，ZVS)可減少開關在切換時所造成的切換損失，提高轉換器的效率。
有別於一般傳統D類共振式轉換器需要兩個功率開關相較之下，本文所提出一個新型E類單切換開關零電流切換串並聯共振式轉換器，使用單一個開關來減少開關上的切換損失，在電路的整體效率上有明顯的提高。
最後針對轉換器的操作原理實做E類轉換器，並且利用實驗結果以及電腦模擬驗證理論的分析，實驗結果令人滿意，本論文所提出的轉換器效率最高可以達到92％的轉換效率。

關鍵字

E類轉換器 ； 柔切技術

並列摘要

Because of the advantages of small circuit size, light weight, low switching loss and high efficiency, resonant converters have now been widely used in various kinds of high-frequency switching converters to replace traditional hard-switching ones. The different combinations of the capacitance and inductance in resonant tank can produce different resonant effects and patterns. Besides, a resonant converter can also achieve ZCS (Zero Current Switching) or ZVS (Zero Voltage Switching) at the time of switching, which can reduce switching losses and enhance the efficiency of converters.
Different from traditional class-D resonant converters that require two power switches, the class-E single-switch, ZCS, series-parallel resonant converter presented in this study used only a single switch to lower switching losses to significantly improve overall circuit efficiency.
In this study an class-E converter was made based on the operation principle of converters, and the results of experiment and computer simulation analysis were satisfactory. The conversion efficiency of the converter could
reach up to 92%.

並列關鍵字

class-E converter ； soft-switching.

參考文獻

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