Design Optimization of Coreless Axial-flux PM Machines with Litz Wire and PCB Stator Windings

Murat G. Kesgin; Peng Han; Narges Taran; Damien Lawhorn; Donovin Lewis; Dan M. Ionel

doi:10.1109/ECCE44975.2020.9236194

Design Optimization of Coreless Axial-flux PM Machines with Litz Wire and PCB Stator Windings

Murat G. Kesgin, Peng Han, Narges Taran, Damien Lawhorn, Donovin Lewis, Dan M. Ionel

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

25 Scopus citations

Abstract

Coreless axial-flux permanent-magnet (AFPM) machines may be attractive options for high-speed and high-power-density applications due to the elimination of core losses. In order to make full use of the advantages offered by these machines and avoid excessive eddy current losses in windings, advanced technologies for winding conductors need to be employed to suppress the eddy effect, such as the Litz wire and printed circuit board (PCB). In this paper, the best practices for designing Litz wire/PCB windings are discussed and a brief survey of state of the art PCB winding technology is provided. Three coreless AFPM machines are mainly considered. A design optimization procedure based on the multi-objective differential evolution algorithm and 3-dimensional (3D) finite element analysis (FEA) is proposed to take into account the ac winding losses of Litz wires and PCB traces in the machine design stage. Selected designs are being prototyped and will be tested with a customized test fixture.

Original language	English
Title of host publication	ECCE 2020 - IEEE Energy Conversion Congress and Exposition
Pages	22-26
Number of pages	5
ISBN (Electronic)	9781728158266
DOIs	https://doi.org/10.1109/ECCE44975.2020.9236194
State	Published - Oct 11 2020
Event	12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 - Virtual, Detroit, United States Duration: Oct 11 2020 → Oct 15 2020

Publication series

Name	ECCE 2020 - IEEE Energy Conversion Congress and Exposition

Conference

Conference	12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
Country/Territory	United States
City	Virtual, Detroit
Period	10/11/20 → 10/15/20

Bibliographical note

Publisher Copyright:
© 2020 IEEE.

Funding

ACKNOWLEDGMENT The support of the National Science Foundation, NSF Grant #1809876, of University of Kentucky, the L. Stanley Pigman endowment and ANSYS Inc., is gratefully acknowledged.

Funders	Funder number
ANSYS, Inc.
University of Kentucky
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China	1809876

Keywords

Axial-flux
Litz wire
PCB
coreless
electric machine
multi-objective optimization
permanent magnet

ASJC Scopus subject areas

Electrical and Electronic Engineering
Mechanical Engineering
Control and Optimization
Energy Engineering and Power Technology

Access to Document

10.1109/ECCE44975.2020.9236194

Cite this

Kesgin, M. G., Han, P., Taran, N., Lawhorn, D., Lewis, D., & Ionel, D. M. (2020). Design Optimization of Coreless Axial-flux PM Machines with Litz Wire and PCB Stator Windings. In ECCE 2020 - IEEE Energy Conversion Congress and Exposition (pp. 22-26). Article 9236194 (ECCE 2020 - IEEE Energy Conversion Congress and Exposition). https://doi.org/10.1109/ECCE44975.2020.9236194

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title = "Design Optimization of Coreless Axial-flux PM Machines with Litz Wire and PCB Stator Windings",

abstract = "Coreless axial-flux permanent-magnet (AFPM) machines may be attractive options for high-speed and high-power-density applications due to the elimination of core losses. In order to make full use of the advantages offered by these machines and avoid excessive eddy current losses in windings, advanced technologies for winding conductors need to be employed to suppress the eddy effect, such as the Litz wire and printed circuit board (PCB). In this paper, the best practices for designing Litz wire/PCB windings are discussed and a brief survey of state of the art PCB winding technology is provided. Three coreless AFPM machines are mainly considered. A design optimization procedure based on the multi-objective differential evolution algorithm and 3-dimensional (3D) finite element analysis (FEA) is proposed to take into account the ac winding losses of Litz wires and PCB traces in the machine design stage. Selected designs are being prototyped and will be tested with a customized test fixture.",

keywords = "Axial-flux, Litz wire, PCB, coreless, electric machine, multi-objective optimization, permanent magnet",

author = "Kesgin, \{Murat G.\} and Peng Han and Narges Taran and Damien Lawhorn and Donovin Lewis and Ionel, \{Dan M.\}",

note = "Publisher Copyright: {\textcopyright} 2020 IEEE.; 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 ; Conference date: 11-10-2020 Through 15-10-2020",

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doi = "10.1109/ECCE44975.2020.9236194",

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Kesgin, MG, Han, P, Taran, N, Lawhorn, D, Lewis, D & Ionel, DM 2020, Design Optimization of Coreless Axial-flux PM Machines with Litz Wire and PCB Stator Windings. in ECCE 2020 - IEEE Energy Conversion Congress and Exposition., 9236194, ECCE 2020 - IEEE Energy Conversion Congress and Exposition, pp. 22-26, 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020, Virtual, Detroit, United States, 10/11/20. https://doi.org/10.1109/ECCE44975.2020.9236194

Design Optimization of Coreless Axial-flux PM Machines with Litz Wire and PCB Stator Windings. / Kesgin, Murat G.; Han, Peng; Taran, Narges et al.
ECCE 2020 - IEEE Energy Conversion Congress and Exposition. 2020. p. 22-26 9236194 (ECCE 2020 - IEEE Energy Conversion Congress and Exposition).

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

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AU - Lawhorn, Damien

AU - Lewis, Donovin

AU - Ionel, Dan M.

PY - 2020/10/11

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N2 - Coreless axial-flux permanent-magnet (AFPM) machines may be attractive options for high-speed and high-power-density applications due to the elimination of core losses. In order to make full use of the advantages offered by these machines and avoid excessive eddy current losses in windings, advanced technologies for winding conductors need to be employed to suppress the eddy effect, such as the Litz wire and printed circuit board (PCB). In this paper, the best practices for designing Litz wire/PCB windings are discussed and a brief survey of state of the art PCB winding technology is provided. Three coreless AFPM machines are mainly considered. A design optimization procedure based on the multi-objective differential evolution algorithm and 3-dimensional (3D) finite element analysis (FEA) is proposed to take into account the ac winding losses of Litz wires and PCB traces in the machine design stage. Selected designs are being prototyped and will be tested with a customized test fixture.

AB - Coreless axial-flux permanent-magnet (AFPM) machines may be attractive options for high-speed and high-power-density applications due to the elimination of core losses. In order to make full use of the advantages offered by these machines and avoid excessive eddy current losses in windings, advanced technologies for winding conductors need to be employed to suppress the eddy effect, such as the Litz wire and printed circuit board (PCB). In this paper, the best practices for designing Litz wire/PCB windings are discussed and a brief survey of state of the art PCB winding technology is provided. Three coreless AFPM machines are mainly considered. A design optimization procedure based on the multi-objective differential evolution algorithm and 3-dimensional (3D) finite element analysis (FEA) is proposed to take into account the ac winding losses of Litz wires and PCB traces in the machine design stage. Selected designs are being prototyped and will be tested with a customized test fixture.

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ER -

Design Optimization of Coreless Axial-flux PM Machines with Litz Wire and PCB Stator Windings

Abstract

Publication series

Conference

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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