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

13 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

Funding Information:
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.

Publisher Copyright:
© 2021 IEEE.

ASJC Scopus subject areas

Automotive Engineering
Electrical and Electronic Engineering
Control and Optimization
Transportation

Access to Document

10.1109/ITEC51675.2021.9490162

Cite this

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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.",

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

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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

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

Abstract

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Bibliographical note

ASJC Scopus subject areas

Access to Document

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