本論文為研製一具低輸出電流漣波之降壓型轉換器。為達成此目的，本文為分別討論被動型電流漣波消除技術與疊接式降壓型轉換器之電流漣波消除技術，並深入研究疊接式降壓型轉換器之耦合電感形式與分離電感形式，比較各種電流漣波消除技術之優缺點後，因考量輸出電流漣波與暫態輸出電流之變化量，最終選用疊接式降壓型轉換器作為研究方向，在考慮開關間死區時間的影響下，雖然可以透過修正開關訊號來減少死區時間造成的IP與IS之電流變化斜率不匹配，透過搭配LC二階濾波器，來進一步降低因開關死區時間所產生之電流漣波，接著推導疊接式降壓型轉換器之耦合電感形式搭配LC二階濾波器之小訊號模型，並研究文獻[1]所提出RC – delay型控制器對暫態的影響，最後在模擬軟體與實作結果中得到驗證，1kW條件下的疊接式降壓型轉換器能成達低輸出電流漣波。

The thesis is to implement a buck converter with low output current ripple. In order to achieve the goal, this paper discusses the passive current ripple cancellation and stacked buck converter with current ripple cancellation respectively. The stacked buck converter can be classified into coupled inductor and separate inductor. After comparing the advantage and of the various methods, considering the output current ripple and transient response, finally choose stacked buck converter with coupled inductor as research direction. Although we can modify the switch signal to reduce the current ripple of the dead time. Further consideration of output current ripple that we can combine the stacked buck converter with LC filter. Deriving a small signal model of stacked buck converter with LC filter and discuss the transient response of the RC delay controller[1]. Under the condition of output power is 1kW, the stacked buck converter with LC filter reduce output current ripple effectively.

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