新型零電壓切換負載共振式轉換器

A Novel Zero-Voltage-Switching Loaded-Resonant Converter

陳泳嶂(Yung-Chang Chen)

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

目前在已知的轉換器中E類共振式轉換器為效率最高，且共振
式轉換器會因共振槽內的共振電感與共振電容排列組合不同產生不同的共振效果，當共振式轉換器功率開關操作於零電壓切換(Zero Voltage Switching, ZVS)或零電流切換(Zero Current Switching, ZCS)，故可減少功率開關切換時造成的切換損失，提高轉換器之效率，充分達到能源不必要的浪費效果。
本論文研製的新型零電壓切換負載共振式轉換器，將功率開關在
零電壓切換(Zero Voltage Switching, ZVS)狀態下操作，可降低其切換損失，提昇轉換器之效率，且功率開關僅有單一個，驅動訊號也只需要一組。不同於傳統D類共振式轉換器需要兩個功率開關，驅動訊號則需兩組，如此一來製作成本勢必提高，電路效率也無法達到預期之目標，所以本論文研製低成本、高效率的新型零電壓切換負載共振式轉換器。

最後將實作之新型零電壓切換負載共振式轉換器的元件參數、規
格時候結果與模擬結果相互比較，驗證本論文所提之新型零電壓切換負載共振式轉換器，最後經實測證實此新型零電壓切換負載共振式轉換器整體電路效率達96.92%，實作結果令人相當滿意，也達到預期之目標以上。

關鍵字

零電壓切換 ； E類共振式換器

並列摘要

In the currently known converters, the class E resonant converter is the most efficient one, and different combinations of resonant inductance and resonant capacitance inside the resonant trough of the resonant converter can produce different resonance effects, so that when the resonant converter power switch is operated at zero voltage switching (ZVS) or zero current switching (ZCS), the losses due to power switch on-and-off can be reduced, and the converter efficiency is thus enhanced, to avoid unnecessary waste of energy.
Presented in this paper is the novel zero-voltage-switch loaded resonant converter whose power switch can be operated at a zero voltage switching (ZVS) mode to reduce the switching losses so as to improve the converter efficiency. This new converter needs only a single power switch as well as a single set of driving signals, while the traditional class D resonant converter needs two power switches and two sets of driving signals, which inevitably results in higher production costs and won’t be able to reach the expected circuit efficiency. As a result, this paper is for the development of the novel low-cost and high efficient zero-voltage-switch loaded resonant converter.

並列關鍵字

zero voltage switching ； class E resonant converter

參考文獻

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