Multielement Resonant Converters With a Notch Filter on Secondary Side

Multielement Resonant Converters With a Notch Filter on Secondary Side
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次级侧带有陷波滤波器的多元件谐振转换器

DOI:
10.1109/tpel.2015.2507263
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发表时间:
2016-06
影响因子:
6.7
通讯作者:
Xing Yan
Xing Yan
中科院分区:
工程技术1区
文献类型:
--
作者:
Wu Hongfei;Jin Xiang;Hu Haibing;Xing Yan

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这封信提出了新的多元件谐振转换器,这是传统的LLC谐振转换器的改进拓扑结构,用于电压升压应用。陷波滤波器被引入到LLC谐振变换器的次级侧。在有限的开关频率范围内,所提出的谐振变换器的电压增益可以低至零。因此,传统LLC谐振转换器的启动和短路输出电路保护问题可以用所提出的解决方案来解决。此外,还可以减少谐振回路的循环能量。与原边带陷波滤波器的多元件谐振变换器相比,该变换器可以降低陷波滤波器的导通损耗,并在谐振频率处提供更高的电压增益。分析了所提出的谐振变换器的拓扑结构和特性。实验结果验证了所提方法的有效性和优越性。
This letter proposes novel multielement resonant converters, which are improved topologies of the conventional LLC resonant converter, for voltage step-up applications. A notch filter is introduced into the secondary side of the LLC resonant converter. The voltage gain of the proposed resonant converters can be as low as zero with limited switching frequency range. Therefore, the start-up and short output circuit protection issues of the conventional LLC resonant converter can be solved with the proposed solutions. Furthermore, the circulating energy of the resonant tank can be reduced as well. In comparison with the multielement resonant converters with a notch filter on primary side, the proposed converter can help to reduce the conduction losses associated with the notch filter and provide higher voltage gain at the resonant frequency. The topologies and characteristics of the proposed resonant converters are analyzed. Experimental results are given to verify the effectiveness and the advantages of the proposed solutions.
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