A comparative study of methods for calculating ac winding losses in permanent magnet machines

Narges Taran; Vandana Rallabandi; Dan M. Ionel; Greg Heins; Dean Patterson

doi:10.1109/IEMDC.2019.8785396

A comparative study of methods for calculating ac winding losses in permanent magnet machines

Narges Taran, Vandana Rallabandi, Dan M. Ionel, Greg Heins, Dean Patterson

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

14 Scopus citations

Abstract

In this study different methods of estimating the additional ac winding loss due to eddy currents at open-circuit are explored. A comparative study of 2D and 3D FEA, and hybrid numerical and analytical methods is performed in order to recommend feasible approaches to be employed. Axial flux permanent magnet (AFPM)machine case studies are included, namely a machine with open slots and a coreless configuration. These machine topologies are expected to present a substantial amount of ac winding loss, which would therefore need to be considered during optimal design. This study is one of the first ones to compare meticulous 3D FEA models with more approximate, but faster solution methods which can be employed in the optimization process. The study is comprehensive and includes other discussions relevant to the subject matter, including the selection of the number of turns, the effect of the conductor cross section shape, the placement of each turn for the two machines under study, and the meshing of the turns for FEA based methods. Furthermore, the paper also proposes a measurement method for additional open-circuit winding losses.

Original language	English
Title of host publication	2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019
Pages	2265-2271
Number of pages	7
ISBN (Electronic)	9781538693490
DOIs	https://doi.org/10.1109/IEMDC.2019.8785396
State	Published - May 2019
Event	11th IEEE International Electric Machines and Drives Conference, IEMDC 2019 - San Diego, United States Duration: May 12 2019 → May 15 2019

Publication series

Name	2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019

Conference

Conference	11th IEEE International Electric Machines and Drives Conference, IEMDC 2019
Country/Territory	United States
City	San Diego
Period	5/12/19 → 5/15/19

Bibliographical note

Funding Information:
ACKNOWLEDGMENT The support of Regal Beloit Corporation, University of Kentucky, the L. Stanley Pigman endowment and the SPARK program, and ANSYS Inc. is gratefully acknowledged.

Publisher Copyright:
© 2019 IEEE.

Keywords

Axial flux
Coreless
Eddy currents
Open circuit winding losses
PM machines
Proximity effect
Skin effect

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering
Mechanical Engineering

Access to Document

10.1109/IEMDC.2019.8785396

Cite this

Taran, N., Rallabandi, V., Ionel, D. M., Heins, G., & Patterson, D. (2019). A comparative study of methods for calculating ac winding losses in permanent magnet machines. In 2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019 (pp. 2265-2271). Article 8785396 (2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019). https://doi.org/10.1109/IEMDC.2019.8785396

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title = "A comparative study of methods for calculating ac winding losses in permanent magnet machines",

abstract = "In this study different methods of estimating the additional ac winding loss due to eddy currents at open-circuit are explored. A comparative study of 2D and 3D FEA, and hybrid numerical and analytical methods is performed in order to recommend feasible approaches to be employed. Axial flux permanent magnet (AFPM)machine case studies are included, namely a machine with open slots and a coreless configuration. These machine topologies are expected to present a substantial amount of ac winding loss, which would therefore need to be considered during optimal design. This study is one of the first ones to compare meticulous 3D FEA models with more approximate, but faster solution methods which can be employed in the optimization process. The study is comprehensive and includes other discussions relevant to the subject matter, including the selection of the number of turns, the effect of the conductor cross section shape, the placement of each turn for the two machines under study, and the meshing of the turns for FEA based methods. Furthermore, the paper also proposes a measurement method for additional open-circuit winding losses.",

keywords = "Axial flux, Coreless, Eddy currents, Open circuit winding losses, PM machines, Proximity effect, Skin effect",

author = "Narges Taran and Vandana Rallabandi and Ionel, {Dan M.} and Greg Heins and Dean Patterson",

note = "Funding Information: ACKNOWLEDGMENT The support of Regal Beloit Corporation, University of Kentucky, the L. Stanley Pigman endowment and the SPARK program, and ANSYS Inc. is gratefully acknowledged. Publisher Copyright: {\textcopyright} 2019 IEEE.; 11th IEEE International Electric Machines and Drives Conference, IEMDC 2019 ; Conference date: 12-05-2019 Through 15-05-2019",

year = "2019",

month = may,

doi = "10.1109/IEMDC.2019.8785396",

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Taran, N, Rallabandi, V, Ionel, DM, Heins, G & Patterson, D 2019, A comparative study of methods for calculating ac winding losses in permanent magnet machines. in 2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019., 8785396, 2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019, pp. 2265-2271, 11th IEEE International Electric Machines and Drives Conference, IEMDC 2019, San Diego, United States, 5/12/19. https://doi.org/10.1109/IEMDC.2019.8785396

A comparative study of methods for calculating ac winding losses in permanent magnet machines. / Taran, Narges; Rallabandi, Vandana; Ionel, Dan M. et al.
2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019. 2019. p. 2265-2271 8785396 (2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019).

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

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AU - Taran, Narges

AU - Rallabandi, Vandana

AU - Ionel, Dan M.

AU - Heins, Greg

AU - Patterson, Dean

N1 - Funding Information: ACKNOWLEDGMENT The support of Regal Beloit Corporation, University of Kentucky, the L. Stanley Pigman endowment and the SPARK program, and ANSYS Inc. is gratefully acknowledged. Publisher Copyright: © 2019 IEEE.

PY - 2019/5

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N2 - In this study different methods of estimating the additional ac winding loss due to eddy currents at open-circuit are explored. A comparative study of 2D and 3D FEA, and hybrid numerical and analytical methods is performed in order to recommend feasible approaches to be employed. Axial flux permanent magnet (AFPM)machine case studies are included, namely a machine with open slots and a coreless configuration. These machine topologies are expected to present a substantial amount of ac winding loss, which would therefore need to be considered during optimal design. This study is one of the first ones to compare meticulous 3D FEA models with more approximate, but faster solution methods which can be employed in the optimization process. The study is comprehensive and includes other discussions relevant to the subject matter, including the selection of the number of turns, the effect of the conductor cross section shape, the placement of each turn for the two machines under study, and the meshing of the turns for FEA based methods. Furthermore, the paper also proposes a measurement method for additional open-circuit winding losses.

AB - In this study different methods of estimating the additional ac winding loss due to eddy currents at open-circuit are explored. A comparative study of 2D and 3D FEA, and hybrid numerical and analytical methods is performed in order to recommend feasible approaches to be employed. Axial flux permanent magnet (AFPM)machine case studies are included, namely a machine with open slots and a coreless configuration. These machine topologies are expected to present a substantial amount of ac winding loss, which would therefore need to be considered during optimal design. This study is one of the first ones to compare meticulous 3D FEA models with more approximate, but faster solution methods which can be employed in the optimization process. The study is comprehensive and includes other discussions relevant to the subject matter, including the selection of the number of turns, the effect of the conductor cross section shape, the placement of each turn for the two machines under study, and the meshing of the turns for FEA based methods. Furthermore, the paper also proposes a measurement method for additional open-circuit winding losses.

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A comparative study of methods for calculating ac winding losses in permanent magnet machines

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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Cite this