电荷自维持电路可以较好地解决双管正激变换器、谐振复位正激变换器、RCD 复位正激变换器等拓扑同步整流采用自驱动方案而出现的死区问题。该文提出了一种新颖的电荷自维持电路，它比现有的电荷自维持电路在结构上更加简单，共态导通的时间更加短，抗干扰能力更强，驱动损耗更小。最后通过实验验证了该电路的有效性和实用性。 ABSTRACT: A novel charge-retention circuit, which can deal with the issue of dead time occurring in the self-driving circuit for synchronous rectifier typically adopted on the secondary side of the following topologies: dual-switch forward converter, resonant reset forward converter, RCD reset forward converter,is presented in this paper. Comparing with the existing charge-retention driving circuit, it has the merits of simplified structure, shorter common conduction time, better immunity to interference and reduced driving loss. Finally, both the validity and practicability are verified by the experimental results. KEY WORDS: Electric power engineering；Synchronous rectifier；Retention；Forward
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