Mitigation of Circulating Currents in Parallel Foil Windings for Medium Frequency Transformers

Siamak Pourkeivannour; Mitrofan Curti; Uwe Drofenik; Andrea Cremasco; Elena A. Lomonova

doi:10.1109/TMAG.2022.3178489

Mitigation of Circulating Currents in Parallel Foil Windings for Medium Frequency Transformers

Siamak Pourkeivannour (Corresponding author), Mitrofan Curti, Uwe Drofenik, Andrea Cremasco, Elena A. Lomonova

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

The practicality of parallel foil windings assembled on medium frequency transformers (MFTs) is analyzed and experimentally verified. The efficiency improvement in case of equal current sharing in parallel windings in contrast to single foil is numerically validated. The presence of circulating currents between parallel windings is investigated using the impedance matrix of the foil windings where the impedances are numerically computed. For experimental validations, an MFT prototype with parallel foil windings is manufactured and the effect of additional external impedances on reducing the circulating currents is addressed. A simple and practical technique is proposed to ensure equal current sharing between parallel windings of MFTs coupled with series resonant converters (SRCs).

Original language	English
Article number	9783087
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	58
Issue number	9
DOIs	https://doi.org/10.1109/TMAG.2022.3178489
Publication status	Published - 1 Sept 2022

Keywords

Circulating Currents
electromagnetic coupling
medium frequency transformers (MFTs)
Parallel Windings
parallel windings
medium-frequency transformers (MFTs)
Circulating currents

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title = "Mitigation of Circulating Currents in Parallel Foil Windings for Medium Frequency Transformers",

abstract = "The practicality of parallel foil windings assembled on medium frequency transformers (MFTs) is analyzed and experimentally verified. The efficiency improvement in case of equal current sharing in parallel windings in contrast to single foil is numerically validated. The presence of circulating currents between parallel windings is investigated using the impedance matrix of the foil windings where the impedances are numerically computed. For experimental validations, an MFT prototype with parallel foil windings is manufactured and the effect of additional external impedances on reducing the circulating currents is addressed. A simple and practical technique is proposed to ensure equal current sharing between parallel windings of MFTs coupled with series resonant converters (SRCs).",

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AU - Pourkeivannour, Siamak

AU - Curti, Mitrofan

AU - Drofenik, Uwe

AU - Cremasco, Andrea

AU - Lomonova, Elena A.

PY - 2022/9/1

Y1 - 2022/9/1

N2 - The practicality of parallel foil windings assembled on medium frequency transformers (MFTs) is analyzed and experimentally verified. The efficiency improvement in case of equal current sharing in parallel windings in contrast to single foil is numerically validated. The presence of circulating currents between parallel windings is investigated using the impedance matrix of the foil windings where the impedances are numerically computed. For experimental validations, an MFT prototype with parallel foil windings is manufactured and the effect of additional external impedances on reducing the circulating currents is addressed. A simple and practical technique is proposed to ensure equal current sharing between parallel windings of MFTs coupled with series resonant converters (SRCs).

AB - The practicality of parallel foil windings assembled on medium frequency transformers (MFTs) is analyzed and experimentally verified. The efficiency improvement in case of equal current sharing in parallel windings in contrast to single foil is numerically validated. The presence of circulating currents between parallel windings is investigated using the impedance matrix of the foil windings where the impedances are numerically computed. For experimental validations, an MFT prototype with parallel foil windings is manufactured and the effect of additional external impedances on reducing the circulating currents is addressed. A simple and practical technique is proposed to ensure equal current sharing between parallel windings of MFTs coupled with series resonant converters (SRCs).

KW - Circulating Currents

KW - electromagnetic coupling

KW - medium frequency transformers (MFTs)

KW - Parallel Windings

KW - parallel windings

KW - medium-frequency transformers (MFTs)

KW - Circulating currents

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DO - 10.1109/TMAG.2022.3178489

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Mitigation of Circulating Currents in Parallel Foil Windings for Medium Frequency Transformers

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