摘要：隨著電力電子技術(shù)的發(fā)展，出現(xiàn)利用電力電子器件構(gòu)成的新型變壓器。特別是具有輸入電壓和輸出電壓基本成比例特性的不可調(diào)壓形式的直流變壓器，得到了越來(lái)越多的人們關(guān)注。本文提出一種組合式雙管正激直流變壓器，詳細(xì)地分析了其工作原理以及輸入、輸出特性、零電壓條件，最后在原理樣機(jī)上進(jìn)行實(shí)驗(yàn)驗(yàn)證。實(shí)驗(yàn)結(jié)果證明理論分析的正確性。 敘詞：直流變壓器 零電壓開(kāi)關(guān) 雙管正激變換器 Abstract：With the development of power electronic technology, transformer function can be realized by using power devices. So the DC transformers whose voltage is not regulated are focused on in resent years. In this paper, a novel combined DC transformer based on two-transistor forward converters is proposed and is analyzed in detailed. And the output characteristic, zero-voltage switching condition is also discussed. At last, the experiment results verify the performance of the proposed DC transformer. Keyword：DC Transformer, Zero-voltage-switching, Two-transistor forward converter