昇圧入力形フルブリッジコンバータの不連続モード動作解析

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  • 富岡 聡
    九州大学大学院システム情報科学府電気電子システム工学専攻 : 博士後期課程
  • 二宮 保
    九州大学大学院システム情報科学研究院電気電子システム工学部門

書誌事項

タイトル別名
  • Analysis of Discontinuous Conduction Mode in Boost-Input Type Full Bridge Converter
  • ショウアツ ニュウリョクケイ フル ブリッジ コンバータ ノ フレンゾク モード ドウサ カイセキ

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抄録

A boost type converter is used in general for power-factor correction. In this case, a DC-DC converter is connected behind the boost converter to generate the isolated output voltage on secondary side. Such a two-stage converter has drawbacks of high cost, large size, and low efficiency. Previously, the full bridge converter that was combined with two boost converters has been proposed, and it is of high efficiency. However, this converter cannot be controlled in the duty ratio range of more than 0.5. This paper presents the improved converter that is able to be controlled for duty ratio of more than 0.5 by using the discontinuous conduction mode associated with the secondary inductor. As a result, a good power-factor-correction capability can be obtained. Furthermore, these characteristics were analyzed, and was confirmed experimentally.

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