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首页> 外文期刊>Industrial Electronics, IEEE Transactions on >A New Current-Driven Synchronous Rectifier for Series–Parallel Resonant ( $LLC$) DC–DC Converter
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A New Current-Driven Synchronous Rectifier for Series–Parallel Resonant ( $LLC$) DC–DC Converter

机译:一种用于串联并联谐振($ LLC $)DC-DC转换器的新型电流驱动同步整流器

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摘要

A new synchronous rectifier (SR) driving method is proposed using primary current sensing in this paper. Because the magnetizing current of transformer is included in the primary winding of transformer, it cannot be used to generate the driving signals of SRs directly. A current-compensating winding in current transformer (CT) is used to cancel out the magnetizing current and generate suitable driving signals for SR. Therefore, one CT is used to generate two driving signals for two SRs in $LLC$ converter with a center-tapped rectifier. This current-driven method is simple and low cost for high-output-current dc–dc application. A 150-W dc–dc prototype using $LLC$ half-bridge converter with the proposed SR circuit is built up to verify the theoretical analysis.
机译:提出了一种利用初级电流感应的新型同步整流器(SR)驱动方法。由于变压器的励磁电流包含在变压器的初级绕组中,因此它不能直接用于生成SR的驱动信号。电流互感器(CT)中的电流补偿绕组用于抵消励磁电流并为SR生成合适的驱动信号。因此,在带有中心抽头整流器的$ LLC $转换器中,一个CT用于为两个SR生成两个驱动信号。对于高输出电流dc-dc应用,这种电流驱动方法简单且成本低。建立了一个150W dc-dc原型,使用带有建议的SR电路的$ LLC $半桥转换器,以验证理论分析。

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