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首页> 外文期刊>Power Electronics, IET >Dynamics analysis of a low-voltage stress single-stage high-power factor correction ac/dc flyback converter
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Dynamics analysis of a low-voltage stress single-stage high-power factor correction ac/dc flyback converter

机译:低压应力单级大功率因数校正交流/直流反激转换器的动力学分析

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摘要

In this study, by integrating a power factor correction buck-boost cell with a dc/dc flyback cell and adding an auxiliary transformer for energy-divider approach, a single-stage high-power factor correction (HPFC) ac/dc flyback converter with low-voltage stress is proposed. The proposed converter exhibits the capabilities of high-power factor and low-voltage stress across the bulk capacitor when its dc/dc cell operates in continuous conduction mode. In this study, the operating principle is presented. The small-signal model of the proposed converter is also derived herein. It shows that the proposed converter with an auxiliary transformer exhibits better dynamical behaviour than the single-stage HPFC ac/dc flyback converter without an auxiliary transformer. Moreover, a proportional-integral controller is well designed for output voltage regulation. Finally, the accuracy of theoretical analysis and performances of overall system are thereby validated by experimental results.
机译:在这项研究中,通过将功率因数校正降压-升压型电池与dc / dc反激式电池集成在一起,并添加用于能量分配器方法的辅助变压器,可以实现单级高功率因数校正(HPFC)ac / dc反激式转换器,提出了低电压应力。当该转换器的dc / dc单元以连续导通模式工作时,其在大容量电容器两端具有高功率因数和低压应力的能力。在这项研究中,提出了工作原理。本文还推导了所提出的转换器的小信号模型。结果表明,与不带辅助变压器的单级HPFC交流/直流反激式转换器相比,建议的带辅助变压器的转换器具有更好的动态性能。而且,比例积分控制器设计得很好,可以调节输出电压。最后,通过实验结果验证了理论分析的准确性和整个系统的性能。

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