A dual pulse modulated five-element multi-resonant DC-DC converter and its performance evaluations
A dual pulse modulated five-element multi-resonant DC-DC converter and its performance evaluations
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DOI：
10.1109/ecce.2013.6647363
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发表时间：
2013-10
期刊：
影响因子：
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通讯作者：
H. Mizutani;T. Mishima;M. Nakaoka
中科院分区：
文献类型：
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作者：
H. Mizutani;T. Mishima;M. Nakaoka
五元件多谐振（LLC-LC）DC-DC变换器可以通过实用范围的脉冲频率调制（PFM）获得宽范围的输出功率和电压调节。然而，这是一个缺点，由于LC反谐振电路中的传导功率损耗，在轻负载条件下功率转换效率恶化。为了解决这一技术问题，将脉冲密度调制（PDM）作为子模式功率调节方案应用于LLC-LC DC-DC变换器。本文介绍了PFM/PDM双模控制LLC - LC DC-DC变换器的基本性能，并进行了实验验证。从效率、输出电压和功率调节特性等方面对LLC - LC DC-DC变换器与传统LLC DC-DC变换器进行了比较，并从实用角度对LLC - LC DC-DC变换器的有效性进行了评价。
A five-element multi-resonant(LLC - LC) dc-dc converter can attain the wide range output power and voltage regulations by a practical-range pulse frequency modulation (PFM). It is a drawback, however, the power conversion efficiency deteriorates under the light load condition due to the conduction power loss in the LC anti-resonant circuit. As a solution to this technical problem, the pulse density modulation (PDM) is applied to the LLC-LC dc-dc converter as the submode power regulation scheme. In this paper, the essential performances of the new prototype of the PFM/PDM dual mode controlled LLC - LC dc-dc converter are presented with the experimental verification. The comparison between the LLC - LC dc-dc converter and the conventional LLC dc-dc converter is described in terms of efficiency as well as output voltage and power regulations characteristics, and the effectiveness of the LLC - LC dc-dc converter is evaluated from a practical point of view.