為改善文獻中所提交錯式雙併降壓轉換器的缺點，本論文提出一種新型的控制方式，亦即調整開關責任週期來調整電壓增益，且藉由交疊部分導通時間的非對稱相移，來達成部份開關的零電壓切換。此架構能改善傳統交錯式雙併降壓電路於開關工作週期低於50%時，無法零電壓切換的問題。使功率開關具柔性切換，可以提升轉換器整體效率，降低因切換損耗產生熱的問題，並具有低輸出電壓漣波之特性。最後設計並實作一120 W具非對稱相移控制之交錯式降壓轉換器，其輸入電壓範圍為54~84 V，輸出電壓為24 V，最高效率可達96%。

This thesis proposes a new control algorithm to improve the defect of the cited interleaved twin-buck converter in the literature. The algorithm can adjust the voltage gain by modulating the duty cycle. And by asymmetrically phase-shift the turn-on periods of the two active switches, i.e. partially overlapping the turn-on intervals, one of the active switch can benefit from zero-voltage-switching. When duty cycle is less than 50%, the problem of failure to zero-voltage switching on of the cited interleaved twin-buck converter can be improved. The switch with soft-switching will enhance the converter’s efficiency. In addition, heat issue cause by switching loss can be decreased and output voltage ripple can be lowered. In this thesis, a 120 -W prototype with input voltage ranging from 54 V to 84 V and 24 V output voltage is designed and implemented. According to the experimental results, the maximum efficiency is up to 96%.

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