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首页> 外文期刊>Power Electronics, IET >Dual-transformer soft-switching DC–DC resonant converter with multiple resonant elements
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Dual-transformer soft-switching DC–DC resonant converter with multiple resonant elements

机译：具有多个谐振元件的双变压器软开关DC-DC谐振转换器

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摘要

A novel dual-transformer DC-DC converter with multiple resonant elements is proposed. Owing to the multi-resonant feature, the converter is able to achieve a wide DC voltage gain range through the proper selection of resonant parameters. The operating frequency is restricted within a narrow scope. The potential high-frequency losses are avoided, which apparently contributes to efficiency improvement. Besides, since the proposed converter contains more resonant frequencies, it is possible to additionally transmit the third-order active power to the load. All the power switches have realised the turn-on soft-switching, while the diodes obtain the soft-switching or quasi-soft-switching for both the turn-on and turn-off periods. To verify the theoretical analyses, a 500W prototype is established in the laboratory. The experimental results demonstrate that the proposed converter can maintain relatively high efficiency (approximate to 95%) among a wide load range. The highest efficiency reaches 95.4% at 300W.
机译：提出了一种具有多个谐振元件的新型双变压器DC-DC转换器。由于具有多谐振功能，该转换器能够通过适当选择谐振参数来实现宽的直流电压增益范围。工作频率被限制在一个狭窄的范围内。避免了潜在的高频损耗，这显然有助于提高效率。此外，由于所提出的转换器包含更多的谐振频率，因此可以额外地将三阶有功功率传输到负载。所有电源开关都实现了导通软开关，而二极管在导通和关断期间均获得了软开关或准软开关。为了验证理论分析，在实验室中建立了一个500W的原型。实验结果表明，提出的转换器可以在较宽的负载范围内保持较高的效率（约95％）。 300W时最高效率达到95.4％。

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