級聯型航空靜止變流器直流環節電路拓撲研究

摘要：基于級聯技術的新型航空靜止變流器的效率主要取決于其直流變換環節。針對低壓大電流應用,推挽正激變換器具有防止開關管的電壓尖峰和抑制變壓器偏磁等特點。本文詳細分析了推挽正激變換器的工作原理，對比研究了該變換器的三種次級整流結構，比較了各自的優缺點。實驗表明，采用全波整流的推挽正激變換器效率可以達到89%以上，為新型航空靜止變流器效率超過85%奠定了基礎。 敘詞：靜止變流器；推挽正激變換器；全橋整流；全波整流；倍流整流 Abstract：The efficiency of a novel aircraft static inverter based on cascaded inverter is mainly rested with its DC link. The push-pull forward converter has the advantages of preventing the high voltage spike of the switches and restraining magnetism deflection of the transformer in low-voltage high-current situation. In this paper, the principle of push-pull forward converter is analyzed in detail, three secondary-side rectifier topologies are studies contrastively and the advantages and disadvantages are compared. Finally, experimental results show that the efficiency of push-pull forward converter with full-wave rectifier is over 89%, which establishes the foundation of the novel aircraft static inverter’s efficiency exceeding 85%. Keyword：aircraft static inverter; push-pull forward converter; full-bridge rectifier; full-wave rectifier; current-doubler rectifier