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首页> 外文期刊>Power Electronics, IEEE Transactions on >Analysis and Design of a High-Efficiency Full-Bridge Single-Stage Converter With Reduced Auxiliary Components
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Analysis and Design of a High-Efficiency Full-Bridge Single-Stage Converter With Reduced Auxiliary Components

机译：辅助部件减少的高效全桥单级变换器的分析与设计

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摘要

This paper presents a single-stage circuit topology consisting of the association of a full-bridge isolated dc–dc converter and two input inductors and two input diodes connected to the mains network, in order to obtain an isolated ac/dc switch mode power supply, with sinusoidal input current. The proposed topology does not use an input bridge rectifier, common in similar applications. The current in the two input inductors can, therefore, flow in both directions. Consequently, the proposed topology equally distributes the current by the four-bridge transistors that provide four input parallel boost power factor correctors (PFCs). The use of the four-bridge transistors to obtain the PFC function and regulate the output voltage with galvanic isolation is a new technique that makes this topology unique, which also contributes to improve the converter efficiency. The definition of appropriate control strategies permitting the accurate simultaneous regulation of output voltage and input current is hereby described. The interdependency between these two conversion processes is completely analysed, allowing for useful design rules. Experimental results were obtained in a 650-W laboratory prototype to verify the theoretical study. A maximum efficiency of 94% was obtained.
机译：本文提出了一种单级电路拓扑，该拓扑包括一个全桥隔离式dc-dc转换器和两个连接至电源网络的输入电感器和两个输入二极管的组合，以便获得隔离式ac / dc开关模式电源，具有正弦输入电流。提出的拓扑不使用在类似应用中常见的输入桥式整流器。因此，两个输入电感器中的电流可以在两个方向上流动。因此，提出的拓扑结构通过提供四个输入并联升压功率因数校正器（PFC）的四桥晶体管平均分配电流。使用四桥晶体管来获得PFC功能并通过电流隔离来调节输出电压是使这种拓扑结构独特的一项新技术，这也有助于提高转换器效率。在此描述了允许精确同时调节输出电压和输入电流的适当控制策略的定义。完全分析了这两个转换过程之间的相互依赖性，从而得出了有用的设计规则。在650 W的实验室原型中获得了实验结果，以验证理论研究。获得了94％的最大效率。

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