基于移相全橋的同步整流DC/DC變換器設計

摘要：本文詳細分析了基于移相全橋的同步整流DC/DC變換器工作原理，結合軟開關的實現對其中主要元器件進行了設計和選型，采用Matlab建模對變換器仿真研究，最后通過采用TMS320F28335芯片對變換器驅動信號和控制程序進行了軟件設計。樣機實驗結果表明，成功實現了軟開關和同步整流，減少了變換器的開關損耗和開通損耗，符合設計要求。 敘詞：移相全橋 同步整流 DC/DC變換器 Abstract：This paper describes the synchronous rectification DC / DC converter works based on phase-shift full-bridge. Combining with the realization of soft-switching, the main components are designed and selected. We do simulation research on converter via Matlab modeling. Finally, we realize software design of inverter drive signal and control program by using TMS320F28335 chip. The simulation results show that soft switch and synchronous rectification are successfully realized, the switching loss and opening loss of the converter are reduced. The experiment meets the design requirements. Keyword：Phase-shift full-bridgeSynchronous rectificationDC/DC Converter