On the design of coreless permanent magnet machines for electric aircraft propulsion

Damien Lawhorn; Peng Han; Donovin Lewis; Yaser Chulaee; Dan M. Ionel

doi:10.1109/ITEC51675.2021.9490162

On the design of coreless permanent magnet machines for electric aircraft propulsion

Damien Lawhorn
, Peng Han
, Donovin Lewis
, Yaser Chulaee
, Dan M. Ionel

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

28 Scopus citations

Abstract

This paper presents design and prototyping studies for coreless and slotless permanent magnet (PM) machines, which have the potential for high power density and efficiency, and discusses their feasibility for electric aircraft propulsion. The emphasis is on axial flux permanent magnet (AFPM) machines with printed circuit board (PCB) stators that have advantages over their wired counterparts in terms of design flexibility, coil accuracy, manufacturing process reliability, and heat dissipation. Detailed electromagnetic finite element analysis models were developed and employed alongside analytical sizing equations to evaluate the performance of two dual-rotor single-stator coreless AFPM designs employing wave and spiral PCB winding patterns. Design considerations for a 10kW 2, 600rpm rating similar to the NASA X-57 electric aircraft propulsor motors are included. A 26-pole prototype machine has been developed and experimental testing results are presented.

Original language	English
Title of host publication	2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021
Pages	278-283
Number of pages	6
ISBN (Electronic)	9781728175836
DOIs	https://doi.org/10.1109/ITEC51675.2021.9490162
State	Published - Jun 21 2021
Event	2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021 - Chicago, United States Duration: Jun 21 2021 → Jun 25 2021

Publication series

Name	2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021

Conference

Conference	2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021
Country/Territory	United States
City	Chicago
Period	6/21/21 → 6/25/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

Funding

The support of the National Aeronautics and Space Administration (NASA) for research on electric aircraft power systems and components through the NASA Grant no. KY GF-20-055 and of the National Science Foundation (NSF) for research on special electric machines and power electronics drives through the NSF Award # 1809876 is gratefully acknowledged. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the NASA or the NSF. The support of University of Kentucky, the L. Stanley Pigman Endowment, of ANSYS, Inc., and of Regal Beloit Corp. is also gratefully acknowledged.

Funders	Funder number
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
National Aeronautics and Space Administration	KY GF-20-055

ASJC Scopus subject areas

Automotive Engineering
Electrical and Electronic Engineering
Control and Optimization
Transportation

Access to Document

10.1109/ITEC51675.2021.9490162

Cite this

@inproceedings{d43befbd6b6e48c38a946e5360433fcd,

title = "On the design of coreless permanent magnet machines for electric aircraft propulsion",

abstract = "This paper presents design and prototyping studies for coreless and slotless permanent magnet (PM) machines, which have the potential for high power density and efficiency, and discusses their feasibility for electric aircraft propulsion. The emphasis is on axial flux permanent magnet (AFPM) machines with printed circuit board (PCB) stators that have advantages over their wired counterparts in terms of design flexibility, coil accuracy, manufacturing process reliability, and heat dissipation. Detailed electromagnetic finite element analysis models were developed and employed alongside analytical sizing equations to evaluate the performance of two dual-rotor single-stator coreless AFPM designs employing wave and spiral PCB winding patterns. Design considerations for a 10kW 2, 600rpm rating similar to the NASA X-57 electric aircraft propulsor motors are included. A 26-pole prototype machine has been developed and experimental testing results are presented.",

author = "Damien Lawhorn and Peng Han and Donovin Lewis and Yaser Chulaee and Ionel, \{Dan M.\}",

note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; 2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021 ; Conference date: 21-06-2021 Through 25-06-2021",

year = "2021",

month = jun,

day = "21",

doi = "10.1109/ITEC51675.2021.9490162",

language = "English",

series = "2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021",

pages = "278--283",

booktitle = "2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021",

}

Lawhorn, D, Han, P, Lewis, D, Chulaee, Y & Ionel, DM 2021, On the design of coreless permanent magnet machines for electric aircraft propulsion. in 2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021. 2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021, pp. 278-283, 2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021, Chicago, United States, 6/21/21. https://doi.org/10.1109/ITEC51675.2021.9490162

On the design of coreless permanent magnet machines for electric aircraft propulsion. / Lawhorn, Damien; Han, Peng; Lewis, Donovin et al.
2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021. 2021. p. 278-283 (2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021).

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

TY - GEN

T1 - On the design of coreless permanent magnet machines for electric aircraft propulsion

AU - Lawhorn, Damien

AU - Han, Peng

AU - Lewis, Donovin

AU - Chulaee, Yaser

AU - Ionel, Dan M.

PY - 2021/6/21

Y1 - 2021/6/21

N2 - This paper presents design and prototyping studies for coreless and slotless permanent magnet (PM) machines, which have the potential for high power density and efficiency, and discusses their feasibility for electric aircraft propulsion. The emphasis is on axial flux permanent magnet (AFPM) machines with printed circuit board (PCB) stators that have advantages over their wired counterparts in terms of design flexibility, coil accuracy, manufacturing process reliability, and heat dissipation. Detailed electromagnetic finite element analysis models were developed and employed alongside analytical sizing equations to evaluate the performance of two dual-rotor single-stator coreless AFPM designs employing wave and spiral PCB winding patterns. Design considerations for a 10kW 2, 600rpm rating similar to the NASA X-57 electric aircraft propulsor motors are included. A 26-pole prototype machine has been developed and experimental testing results are presented.

AB - This paper presents design and prototyping studies for coreless and slotless permanent magnet (PM) machines, which have the potential for high power density and efficiency, and discusses their feasibility for electric aircraft propulsion. The emphasis is on axial flux permanent magnet (AFPM) machines with printed circuit board (PCB) stators that have advantages over their wired counterparts in terms of design flexibility, coil accuracy, manufacturing process reliability, and heat dissipation. Detailed electromagnetic finite element analysis models were developed and employed alongside analytical sizing equations to evaluate the performance of two dual-rotor single-stator coreless AFPM designs employing wave and spiral PCB winding patterns. Design considerations for a 10kW 2, 600rpm rating similar to the NASA X-57 electric aircraft propulsor motors are included. A 26-pole prototype machine has been developed and experimental testing results are presented.

UR - https://www.scopus.com/pages/publications/85114491750

UR - https://www.scopus.com/pages/publications/85114491750#tab=citedBy

U2 - 10.1109/ITEC51675.2021.9490162

DO - 10.1109/ITEC51675.2021.9490162

M3 - Conference contribution

AN - SCOPUS:85114491750

T3 - 2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021

SP - 278

EP - 283

BT - 2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021

T2 - 2021 IEEE Transportation Electrification Conference and Expo, ITEC 2021

Y2 - 21 June 2021 through 25 June 2021

ER -

On the design of coreless permanent magnet machines for electric aircraft propulsion

Abstract

Publication series

Conference

Bibliographical note

Funding

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this