Laminated Permanent Magnets Enable Compact Magnetic Components in Current Source Converters

Xiangyu Han; Zheng An; Mickael J. Mauger; Joseph Benzaquen; Rajendra Prasad Kandula; Deepak Divan

doi:10.1109/ECCE47101.2021.9595580

Laminated Permanent Magnets Enable Compact Magnetic Components in Current Source Converters

Xiangyu Han, Zheng An, Mickael J. Mauger, Joseph Benzaquen, Rajendra Prasad Kandula, Deepak Divan

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

Magnetic components play a key role in determining the size, cost, efficiency of a power converter. They are more significant in current source converters, where the dc-link energy is stored in an inductor/transformer. In such cases, the magnetics have a predominantly DC flux, superimposed by an AC flux at switching frequency. Previously, permanent magnets have been proposed to offset the DC flux and thereby reduce the size, cost, and losses of the inductors/transformers. This paper starts by analyzing the issue of eddy currents when using such standard permanent magnets, especially in medium frequency applications, making them practically unusable. Alternatively, the paper proposes the use of laminated permanent magnets to reduce these eddy currents and thereby realize the benefits of offsetting the DC flux to reduce the size, cost, and loss of inductors/transformers. Using a soft-switching solid-state transformer as an example, experimental results are presented to show the impact of eddy currents in standard permanent magnets when used with a medium frequency transformer. Experimental results showing the benefits of using laminated magnets in reducing the eddy currents are presented.

Original language	English
Title of host publication	2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	5515-5522
Number of pages	8
ISBN (Electronic)	9781728151359
DOIs	https://doi.org/10.1109/ECCE47101.2021.9595580
State	Published - 2021
Externally published	Yes
Event	13th IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Virtual, Online, Canada Duration: Oct 10 2021 → Oct 14 2021

Publication series

Name	2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings

Conference

Conference	13th IEEE Energy Conversion Congress and Exposition, ECCE 2021
Country/Territory	Canada
City	Virtual, Online
Period	10/10/21 → 10/14/21

Funding

ACKNOWLEDGMENT The authors would like to thank the Center for Distributed Energy at Georgia Tech, Atlanta for their support of this research. In addition, the authors would also like to thank Xiwei Zheng, Brandon Royal, and all mechanical assistants for helping with the build of the hardware prototypes.

Keywords

DC inductor filters
Flyback transformers
eddy current loss
laminated magnets
medium-frequency transformers

Access to Document

10.1109/ECCE47101.2021.9595580

Cite this

Han, X., An, Z., Mauger, M. J., Benzaquen, J., Kandula, R. P., & Divan, D. (2021). Laminated Permanent Magnets Enable Compact Magnetic Components in Current Source Converters. In 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings (pp. 5515-5522). (2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE47101.2021.9595580

Han, Xiangyu ; An, Zheng ; Mauger, Mickael J. et al. / Laminated Permanent Magnets Enable Compact Magnetic Components in Current Source Converters. 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2021. pp. 5515-5522 (2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings).

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title = "Laminated Permanent Magnets Enable Compact Magnetic Components in Current Source Converters",

abstract = "Magnetic components play a key role in determining the size, cost, efficiency of a power converter. They are more significant in current source converters, where the dc-link energy is stored in an inductor/transformer. In such cases, the magnetics have a predominantly DC flux, superimposed by an AC flux at switching frequency. Previously, permanent magnets have been proposed to offset the DC flux and thereby reduce the size, cost, and losses of the inductors/transformers. This paper starts by analyzing the issue of eddy currents when using such standard permanent magnets, especially in medium frequency applications, making them practically unusable. Alternatively, the paper proposes the use of laminated permanent magnets to reduce these eddy currents and thereby realize the benefits of offsetting the DC flux to reduce the size, cost, and loss of inductors/transformers. Using a soft-switching solid-state transformer as an example, experimental results are presented to show the impact of eddy currents in standard permanent magnets when used with a medium frequency transformer. Experimental results showing the benefits of using laminated magnets in reducing the eddy currents are presented.",

keywords = "DC inductor filters, Flyback transformers, eddy current loss, laminated magnets, medium-frequency transformers",

author = "Xiangyu Han and Zheng An and Mauger, {Mickael J.} and Joseph Benzaquen and Kandula, {Rajendra Prasad} and Deepak Divan",

note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; 13th IEEE Energy Conversion Congress and Exposition, ECCE 2021 ; Conference date: 10-10-2021 Through 14-10-2021",

year = "2021",

doi = "10.1109/ECCE47101.2021.9595580",

language = "English",

series = "2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings",

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Han, X, An, Z, Mauger, MJ, Benzaquen, J, Kandula, RP & Divan, D 2021, Laminated Permanent Magnets Enable Compact Magnetic Components in Current Source Converters. in 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings. 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings, Institute of Electrical and Electronics Engineers Inc., pp. 5515-5522, 13th IEEE Energy Conversion Congress and Exposition, ECCE 2021, Virtual, Online, Canada, 10/10/21. https://doi.org/10.1109/ECCE47101.2021.9595580

Laminated Permanent Magnets Enable Compact Magnetic Components in Current Source Converters. / Han, Xiangyu; An, Zheng; Mauger, Mickael J. et al.
2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2021. p. 5515-5522 (2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Laminated Permanent Magnets Enable Compact Magnetic Components in Current Source Converters

AU - Han, Xiangyu

AU - An, Zheng

AU - Mauger, Mickael J.

AU - Benzaquen, Joseph

AU - Kandula, Rajendra Prasad

AU - Divan, Deepak

PY - 2021

Y1 - 2021

N2 - Magnetic components play a key role in determining the size, cost, efficiency of a power converter. They are more significant in current source converters, where the dc-link energy is stored in an inductor/transformer. In such cases, the magnetics have a predominantly DC flux, superimposed by an AC flux at switching frequency. Previously, permanent magnets have been proposed to offset the DC flux and thereby reduce the size, cost, and losses of the inductors/transformers. This paper starts by analyzing the issue of eddy currents when using such standard permanent magnets, especially in medium frequency applications, making them practically unusable. Alternatively, the paper proposes the use of laminated permanent magnets to reduce these eddy currents and thereby realize the benefits of offsetting the DC flux to reduce the size, cost, and loss of inductors/transformers. Using a soft-switching solid-state transformer as an example, experimental results are presented to show the impact of eddy currents in standard permanent magnets when used with a medium frequency transformer. Experimental results showing the benefits of using laminated magnets in reducing the eddy currents are presented.

AB - Magnetic components play a key role in determining the size, cost, efficiency of a power converter. They are more significant in current source converters, where the dc-link energy is stored in an inductor/transformer. In such cases, the magnetics have a predominantly DC flux, superimposed by an AC flux at switching frequency. Previously, permanent magnets have been proposed to offset the DC flux and thereby reduce the size, cost, and losses of the inductors/transformers. This paper starts by analyzing the issue of eddy currents when using such standard permanent magnets, especially in medium frequency applications, making them practically unusable. Alternatively, the paper proposes the use of laminated permanent magnets to reduce these eddy currents and thereby realize the benefits of offsetting the DC flux to reduce the size, cost, and loss of inductors/transformers. Using a soft-switching solid-state transformer as an example, experimental results are presented to show the impact of eddy currents in standard permanent magnets when used with a medium frequency transformer. Experimental results showing the benefits of using laminated magnets in reducing the eddy currents are presented.

KW - DC inductor filters

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T3 - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings

SP - 5515

EP - 5522

BT - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 13th IEEE Energy Conversion Congress and Exposition, ECCE 2021

Y2 - 10 October 2021 through 14 October 2021

ER -

Han X, An Z, Mauger MJ, Benzaquen J, Kandula RP, Divan D. Laminated Permanent Magnets Enable Compact Magnetic Components in Current Source Converters. In 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2021. p. 5515-5522. (2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings). doi: 10.1109/ECCE47101.2021.9595580

Laminated Permanent Magnets Enable Compact Magnetic Components in Current Source Converters

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