Optimal Design and Tradeoffs Analysis for Planar Transformer in High Power DC-DC Converters

Ziwei Ouyang; Ole Cornelius Thomsen; Michael A. E. Andersen

Optimal Design and Tradeoffs Analysis for Planar Transformer in High Power DC-DC Converters

Ziwei Ouyang, Ole Cornelius Thomsen, Michael A. E. Andersen

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

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Abstract

A planar magnetic is a low profile transformer or inductor utilizing planar windings instead of the traditional windings made of Cu-wires. In this paper, the important factors for planar transformer design including winding loss, core loss, leakage inductance and stray capacitance have been investigated individually. The tradeoffs among these factors have to be analyzed in order to achieve optimal parameters. Combined with a certain application, four typical winding arrangements have been compared to illustrate each their advantages and disadvantages. An improved interleaving structure with optimal behaviors is proposed, which constructs the top layer paralleling with the bottom layer and then in series with the other turns of the primary so that a lower magneto motive force (MMF) ratio m can be obtained as well as minimized AC resistance, leakage inductance and even stray capacitance. A 1.2-kW full-bridge DC-DC converter prototype employing the improved planar transformer structure has been constructed, over 96% efficiency is achieved and a 2.7% improvement compared to the non-interleaving structure is obtained.

Original language	English
Title of host publication	The 2010 International Power Electronics Conference - ECCE ASIA - IPEC-Sapporo 2010
Publisher	IEEE
Publication date	2010
ISBN (Print)	978-1-4244-5395-5
Publication status	Published - 2010
Event	The 2010 International Power Electronics Conference - ECCE ASIA - IPEC-Sapporo 2010 - Sapporo, Japan Duration: 1 Jan 2010 → …

Conference

Conference	The 2010 International Power Electronics Conference - ECCE ASIA - IPEC-Sapporo 2010
City	Sapporo, Japan
Period	01/01/2010 → …

Bibliographical note

Copyright 2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

Keywords

DC-DC
stray capacitance
Planar transformer
leakage inductance
winding loss
interleaving
core loss

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@inproceedings{b0b52f1c0ec44524b5a98b1e16a812f5,

title = "Optimal Design and Tradeoffs Analysis for Planar Transformer in High Power DC-DC Converters",

abstract = "A planar magnetic is a low profile transformer or inductor utilizing planar windings instead of the traditional windings made of Cu-wires. In this paper, the important factors for planar transformer design including winding loss, core loss, leakage inductance and stray capacitance have been investigated individually. The tradeoffs among these factors have to be analyzed in order to achieve optimal parameters. Combined with a certain application, four typical winding arrangements have been compared to illustrate each their advantages and disadvantages. An improved interleaving structure with optimal behaviors is proposed, which constructs the top layer paralleling with the bottom layer and then in series with the other turns of the primary so that a lower magneto motive force (MMF) ratio m can be obtained as well as minimized AC resistance, leakage inductance and even stray capacitance. A 1.2-kW full-bridge DC-DC converter prototype employing the improved planar transformer structure has been constructed, over 96% efficiency is achieved and a 2.7% improvement compared to the non-interleaving structure is obtained.",

keywords = "DC-DC, stray capacitance, Planar transformer, leakage inductance, winding loss, interleaving, core loss",

author = "Ziwei Ouyang and Thomsen, {Ole Cornelius} and Andersen, {Michael A. E.}",

note = "Copyright 2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.; The 2010 International Power Electronics Conference - ECCE ASIA - IPEC-Sapporo 2010, ECCE ASIA ; Conference date: 01-01-2010",

year = "2010",

language = "English",

isbn = "978-1-4244-5395-5",

booktitle = "The 2010 International Power Electronics Conference - ECCE ASIA - IPEC-Sapporo 2010",

publisher = "IEEE",

address = "United States",

}

Optimal Design and Tradeoffs Analysis for Planar Transformer in High Power DC-DC Converters. / Ouyang, Ziwei; Thomsen, Ole Cornelius; Andersen, Michael A. E.

The 2010 International Power Electronics Conference - ECCE ASIA - IPEC-Sapporo 2010. IEEE, 2010.

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

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AU - Ouyang, Ziwei

AU - Thomsen, Ole Cornelius

AU - Andersen, Michael A. E.

N1 - Copyright 2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

PY - 2010

Y1 - 2010

N2 - A planar magnetic is a low profile transformer or inductor utilizing planar windings instead of the traditional windings made of Cu-wires. In this paper, the important factors for planar transformer design including winding loss, core loss, leakage inductance and stray capacitance have been investigated individually. The tradeoffs among these factors have to be analyzed in order to achieve optimal parameters. Combined with a certain application, four typical winding arrangements have been compared to illustrate each their advantages and disadvantages. An improved interleaving structure with optimal behaviors is proposed, which constructs the top layer paralleling with the bottom layer and then in series with the other turns of the primary so that a lower magneto motive force (MMF) ratio m can be obtained as well as minimized AC resistance, leakage inductance and even stray capacitance. A 1.2-kW full-bridge DC-DC converter prototype employing the improved planar transformer structure has been constructed, over 96% efficiency is achieved and a 2.7% improvement compared to the non-interleaving structure is obtained.

AB - A planar magnetic is a low profile transformer or inductor utilizing planar windings instead of the traditional windings made of Cu-wires. In this paper, the important factors for planar transformer design including winding loss, core loss, leakage inductance and stray capacitance have been investigated individually. The tradeoffs among these factors have to be analyzed in order to achieve optimal parameters. Combined with a certain application, four typical winding arrangements have been compared to illustrate each their advantages and disadvantages. An improved interleaving structure with optimal behaviors is proposed, which constructs the top layer paralleling with the bottom layer and then in series with the other turns of the primary so that a lower magneto motive force (MMF) ratio m can be obtained as well as minimized AC resistance, leakage inductance and even stray capacitance. A 1.2-kW full-bridge DC-DC converter prototype employing the improved planar transformer structure has been constructed, over 96% efficiency is achieved and a 2.7% improvement compared to the non-interleaving structure is obtained.

KW - DC-DC

KW - stray capacitance

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KW - leakage inductance

KW - winding loss

KW - interleaving

KW - core loss

M3 - Article in proceedings

SN - 978-1-4244-5395-5

BT - The 2010 International Power Electronics Conference - ECCE ASIA - IPEC-Sapporo 2010

PB - IEEE

T2 - The 2010 International Power Electronics Conference - ECCE ASIA - IPEC-Sapporo 2010

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