適用于汽車電源系統的全橋推挽式雙向DC-DC變換器

摘要：近年來，帶有超級電容器的儲能系統受到廣泛的關注和研究，逐漸發展成為電子化汽車的電源系統。本文提出了一種全橋推挽式雙向DC-DC變換器及其控制方法，通過實驗驗證，該系統能夠實現低壓大電流超級電容側和高壓弱電流傳動和蓄電池側之間充分的充放電操作。此外，利用零電壓（ZVS）技術，在高壓側設置無損耗緩沖電容和在低壓大電流超級電容側設置同步整流器，可以大大減小傳導損耗和電壓/電流浪涌。 敘詞：雙向DC-DC變換器 超級電容器 同步整流器 高頻功率變換 汽車電源系統 Abstract： In recent years, energy storage systems assisted by super capacitor have been widely researched and developed to progress power systems for the electronic vehicles. In this paper, a full-bridge/push-pull circuit-based bidirectional DC-DC converter and its control methods are proposed. From the results of detailed experimental demonstration, the proposed system is able to perform adequate charge and discharge operation between low-voltage high-current super capacitor side and high-voltage low-current side with drive train and main battery. Furthermore, conduction losses and voltage/current surge are drastically reduced by ZVS operation with loss-less snubber capacitor in high voltage side as well as the　synchronous　rectification in low-voltage high-current super capacitor side. Keyword：Bidirectional DC-DC converter, Super capacitor, Synchronous rectifier, High frequency power conversion, Automobile electric power system