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- W4379985064 abstract "As a differentiating technology from the conventional technology utilizing a Litz wire, a low-cost and simple structure that reduces in-plane eddy-current loss due to the leakage magnetic flux generated in the copper-foil windings of a medium-frequency transformer (MFT) was devised. An MFT based on this structure was prototyped by processing a tapered cross-section at both ends of the copper foil of the windings. The frequency-versus-AC-resistance ( <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>R<sub>ac</sub></i> ) and current-versus-winding loss ( <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>W<sub>C</sub></i> ) performances of the windings were evaluated by short-circuit test. According to the results of the test, <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>R<sub>ac</sub></i> of the prototyped MFT at operating frequency of around 1 kHz can be reduced by up to 8% compared that of an MFT with conventional copper-foil windings. In addition, <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>W<sub>C</sub></i> of the prototyped MFT was estimated by the finite element method (FEM) within an error of 2% in consideration of the in-plane eddy-current loss of the copper foils." @default.
- W4379985064 created "2023-06-10" @default.
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- W4379985064 date "2023-01-01" @default.
- W4379985064 modified "2023-09-23" @default.
- W4379985064 title "Eddy-Current Reduction Structure of Copper Foil Winding for Medium-Frequency Transformer in DC-grid Applications" @default.
- W4379985064 doi "https://doi.org/10.1109/tmag.2023.3284497" @default.
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