具同步整流錯相式DE類諧振轉換器研製

本論文主旨為設計並製作「具同步整流錯相式DE類諧振轉換器」。所提DE類諧振電路由前端的D類半橋諧振換流與後端的E類整流電路串接組成，在電感性負載與模組化設計基礎上，以結構錯相及同步整流方式併聯操作，具有架構簡單、高效率、高功率密度、低輸出漣波與低成本等優點。在控制部份，本論文以L6599為控制晶片，運用頻率調變方法，達到輸出穩壓之目的；同步整流則利用IR1168進行自激控制以提升效率。本論文經由理論分析、設計與模擬，實際製作180W/19V/9.4A錯相式同步整流DE類諧振轉換器與非錯相非同步轉換器各一組，以進行比較與分析，對於E類整流電路易產生振鈴效應的問題，本論文亦提出改善方法。經由實驗及測試，證明所提電路的理論預期與實驗結果相當一致，功率開關在全負載範圍皆可零電壓導通，最大效率在80%負載可達92.8%。

關鍵字

錯相式轉換器； DE 類諧振轉換器；零電壓切換；同步整流

並列摘要

This thesis deals with the analysis and implementation of interleaved Class DE resonant converter with synchronous rectification. The proposed converter consists of Class D resonant inverter at the front end and Class E rectifier at the rear end. Based on inductive load and modular design, the converter is configured to operate with two modules interleaved in parallel and synchronized in rectification. Advantages of such a converter include simple structure, high efficiency, high power density, low output ripple, and better cost effectiveness. To account for converter control, L6599 as the frequency modulation IC to regulate the output voltage and IR1168 as the self-driving synchronous rectifier to enhance converter efficiency have been used. Except theory, design and simulation, two prototype converters with rating 180W/19V/9.4A, one has interleaved structure and the other has not, are constructed respectively for performance comparison. The remedy to mitigate the ringing effect caused by parasitic elements in the class E rectifier is proposed and discussed. As a result, the experimental measurements find good agreements with theory anticipation. Zero voltage switching is realized in full load range. With the ringing effect being eliminated moderately, the converter maximum efficiency is found to be 92.8% at the 80% load.