A Comparison of Switching Power Losses in the DC-DC Converters

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  • 各種DC-DCコンバータにおけるスイッチング損失の比較
  • カクシュ DC-DC コンバータ ニ オケル スイッチング ソンシツ ノ ヒカク

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Abstract

The DC-DC converters are used for a lot of applications, such as HEVs (hybrid electric vehicles) , EVs (electric vehicles) and DC-power grids. However, on the other hand, the DC-DC converter requires further improvements in conversion efficiency, cost and size. There are mainly three types of hard switched DC-DC converters: buck, boost and buck-boost (a single switch-type and a double switch-type) . Comparisons of losses (conduction losses of the switching power devices, and an inductor loss) in these DC-DC converters have been reported. However, as far as the authors know, there has been no comparison of the switching losses in the buck-boost DC-DC converters. Therefore, in this paper, the authors describe a comparison of the switching losses in various DC-DC converters with a simple analysis and computer simulation.

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