The goal of this paper is , by serial / parallel combination technique of two - transistos forward converters ( ttfcs ) , to keep the merits of the ttfc , and to overcome the shortages of it . the interleaving technique is adopted , while in combining ttfcs . the interleaving technique lowers the net ripple amplitude and raises the effective ripple frequency of the overall converter without increasing switching losses or device stresses 組合式雙管正激變換器由雙管正激變換器串并聯(lián)構成,應用交錯控制策略,在保留雙管正激變換器功率開關管電壓應力低和可靠性高的優(yōu)點同時,克服了等效占空比小、副邊二極管電壓應力高、輸出電流脈動大等缺點。